TOEFL 5000 Vocabulary Volume 1

  • abbreviation

    (n.) shortened form of a word or phrase
  • abnormal

    (adj.) deviating from what is normal
  • abort

    (v.) to terminate prematurely
  • abrasive

    (adj.) rough and harsh in texture
  • absence

    (n.) lack of presentness
  • absolutely

    (adj.) completely and unquestionably
  • abstract

    (adj.) tangible or concrete; theoretical
  • accidental

    (adj.) happening by chance
  • accompany

    (v.) to go along with
  • accomplished

    (adj.) highly skilled or completed
  • accounting

    (n.) recording financial transactions
  • acid

    (n.) sour-tasting corrosive substance
  • acidic

    (adj.) ph less than 7; sour
  • actual

    (adj.) real or existing
  • acupuncture

    (n.) traditional chinese needle therapy
  • adequate

    (adj.) sufficient for needs
  • adhere

    (v.) stick firmly to surface
  • adhesive

    (adj.) substance used for sticking
  • adjunct

    (n.) something added or attached
  • admit

    (v.) confess or allow entry
  • adventure

    (n.) exciting experience or activity
  • adventurous

    (adj.) willing to take risks
  • adversity

    (n.) difficult or undesirable conditions
  • advocate

    (v.) publicly support a cause
  • aerodynamics

    (n.) study of airflow around objects
  • affected

    (adj.) acted upon or influenced
  • affective

    (adj.) relating to emotion
  • aggravate

    (v.) worsen or intensify
  • aggregation

    (n.) group or collection
  • ailment

    (n.) minor illness or disorder
  • aircraft

    (n.) flying vehicle such as airplane
  • alert

    (n.) vigilant and attentive
  • alike

    (adj.) similar or identical
  • allegation

    (n,.) claim or accusation
  • alliteration

    (n.) repetition of initial sounds
  • alone

    (adj.) without others
  • alteration

    (n.) change or modification
  • alternation

    (n.) the act of changing back and forth
  • aluminum

    (n.) metal element with symbols al
  • amazement

    (n.) a feeling of great surprise or wonder
  • ambivalence

    (n.) conflicting feelings
  • amenable

    (adj.) willing to cooperate
  • analogy

    (n.) comparison to show similarity
  • analysis

    (n.) detailed examination
  • anecdote

    (n.) short interesting story
  • anesthetic

    (n.) drug that causes insensitivity
  • angular

    (adj.) shaped with sharp corners
  • annually

    (adv.) once a year
  • anthem

    (n.) song representing a nation
  • anthropology

    (n.) study of humans and cultures
  • anticipation

    (n.) expectation of something
  • antiquated

    (adj.) outdated or old-fashioned
  • antiquity

    (n.) ancient times or objects
  • antiseptic

    (n.) substance preventing infection
  • appointment

    (n.) scheduled meeting
  • apprentice

    (n.) learner under a mentor
  • approval

    (n.) official permission or agreement
  • approve

    (v.) officially agree to or accept
  • aquamarine

    (adj.) blue-green mineral or color
  • aquarium

    (n.) place for keeping aquatic animals
  • arboreal

    (adj.) relating to trees
  • archaeology

    (n.) study of ancient societies
  • architect

    (n.) designer of buildings
  • arithmetic

    (n.) mathematical calculations
  • armor

    (n.) protective covering in battle
  • arms

    (n.) weapons or weapons system
  • array

    (v.) arranged grouping or display
  • arsenal

    (n.) military storage of weapons
  • artery

    (n.) blood vessel carrying blood away from heart
  • articulate

    (v.) express clearly and effectively
  • ascent

    (n.) climb or upward movement
  • assignment

    (n.) task or duty assigned
  • association

    (n.) group of related people or things
  • assorted

    (adj.) mixed variety of items
  • assortment

    (n.) variety of different types
  • assume

    (v.) to suppose or take for granted
  • assumption

    (n.) belief accepted without proof
  • assure

    (v.) guarantee or promise confidently
  • astonish

    (v.) to surprise greatly
  • astute

    (adj.) shrewd and perceptive
  • asymmetrical

    (adj.) lacking symmetry or balance
  • athlete

    (n.) sports person or competitor
  • atomization

    (n.) breaking into small particles
  • atrophy

    (n.) gradual wasting away
  • attempt

    (n.) to try or make an effort
  • audience

    (n.) group watching or listening
  • aurora

    (n.) natural light display in skies
  • autonomous

    (adj.) independent or self-governing
  • avenue

    (n.) wide road or street
  • average

    (adj.) typical or standard amount
  • averse

    (adj.) disinclined or opposed
  • aviator

    (n.) airplane pilot
  • avoid

    (v.) stay away from
  • axis

    (n.) central line around which something rotates
  • bachelor

    (n.) unmarried man
  • backbone

    (n.) spinal column; main support
  • balloonist

    (n.) person who flies hot air balloons
  • bankruptcy

    (n.) legal state of financial failure
  • bar

    (n.) metal rod or barrier
  • barb

    (n.) sharp projection or criticism
  • bark

    (n.) outer covering of a tree or dog・s shout
  • barrel

    (n.) cylindrical container for liquids or goods
  • barrenness

    (n.) state of being unproductive or sterile
  • barter

    (v.) exchange goods or services without money
  • bean

    (n.) edible seed from a plant, often in pod
  • bear

    (v.) large mammal that hibernates or endures
  • beat

    (v.) strike or rhythm in music or movement
  • behalf

    (n.) in the interest or support of someone
  • below

    (adv.) at a lower level or position
  • besiege

    (v.) surround and attack with forces
  • bilateral

    (adj.) involving two sides or parties
  • billion

    (n.) number equal to a thousand million
  • biologist

    (n.) scientist who studies living organisms
  • bitterness

    (n.) intense painful or unpleasant emotion
  • blink

    (v.) quick closing and opening of eyes
  • blizzard

    (n.) heavy snowstorm with strong winds
  • blossom

    (n.) flower or period of flowering in trees
  • boast

    (v.) brag or speak proudly about oneself
  • bolster

    (v.) support or strengthen mentally or physically
  • boredom

    (n.) state of being uninterested
  • boring

    (adj.) causing boredom or dullness
  • boulder

    (n.) large rounded rock
  • bound

    (n.) tied or restricted; to move quickly
  • bowl

    (v.) round shallow dish for food or liquid
  • braid

    (v.) interlace three or more strands
  • breathe

    (v.) take air into or out of lungs
  • breathtaking

    (adj.) astonishingly beautiful or exciting
  • briny

    (adj.) salty like the sea
  • broaden

    (v.) make wider or more extensive
  • bud

    (n.) undeveloped flower or leaf on a stem
  • buggy

    (n.) small vehicle or carriages for children
  • bulb

    (n.) rounded underground plant storage
  • bundle

    (v.) collection of things tied or wrapped together
  • burrow

    (n.) hole or tunnel for habitation or concealment
  • cab

    (n.) vehicle for transporting passengers
  • cabal

    (n.) secret group seeking power or influence
  • cabin

    (n.) small shelter or house in the woods
  • cadence

    (n.) rhythmic flow of sounds or words
  • calculator

    (n.) device for performing mathematical calculations
  • cancel

    (v.) call off or terminate something
  • candid

    (adj.) honest and straightforward
  • carat

    (n.) unit of weight for precious stones
  • career

    (n.) a profession or occupation over time
  • cargo

    (n.) goods carried by ship, plane, or vehicle
  • caricature

    (n.) exaggerated humorous drawing
  • cater

    (v.) provide food or service for events
  • cause

    (n.) reason for an action or event
  • cease

    (v.) come to an end or stop
  • ceremonial

    (n.) relating to formal events or rituals
  • chafe

    (v.) irritate or wear away by rubbing
  • chalk

    (n.) soft white or colored limestone
  • championship

    (n.) contest to determine best team or individual
  • characteristic

    (n.) distinguishing trait or feature
  • chat

    (n.) casual conversation or talk
  • check

    (v.) examine or verify accuracy
  • checkup

    (n.) medical examination or review
  • chili

    (n.) spicy pepper or food made with it
  • choppy

    (adj.) with abrupt, uneven movement
  • chronology

    (n.) arrangement of events in time
  • cipher

    (n.) secret code or zero value in math
  • circle

    (n.) round shape or object
  • circular

    (adj.) having the shape of a circle
  • circulation

    (n.) movement or flow of air or liquid
  • circumstance

    (n.) condition or fact affecting situation
  • citizenship

    (n.) legal status of being a citizen
  • clam

    (n.) shellfish with soft body and shell
  • clause

    (n.) grammatical unit with a subject and predicate
  • clay

    (n.) earthy material used in pottery
  • climate

    (n.) weather pattern of a region
  • cling

    (v.) hold on tightly or stubbornly
  • clip

    (n.) shorten or attach with a clip
  • coach

    (n.) person who trains or guides
  • coalescence

    (n.) process of coming together
  • coarse

    (adj.) rough or harsh in texture or quality
  • coffeepot

    (n.) vessel used to brew or serve coffee
  • cohesion

    (n.) act of sticking together tightly
  • coin

    (n.) small metal piece used as money
  • coincidence

    (n.) unexpected occurrence of events
  • collaborate

    (v.) work jointly on a project
  • collaboration

    (n.) act of working together
  • collusion

    (n.) secret agreement, often dishonest
  • colonize

    (v.) establish a colony or settlement
  • combine

    (v.) join or merge together
  • commerce

    (n.) buying and selling of goods
  • committee

    (n.) organized group for a purpose
  • community

    (n.) group sharing common interests
  • commuter

    (n.) person traveling to work regularly
  • compact

    (n.) small or tightly packed object or agreement
  • comparable

    (adj.) similar enough to compare
  • comparative

    (adj.) relative or relative to something else
  • compensation

    (n.) payment or reward for work
  • compensatory

    (adj.) making up for loss or damage
  • competition

    (n.) contest or rivalry
  • complement

    (n.) something that completes or enhances
  • complementary

    (adj.) mutually enhancing or matching
  • complicated

    (adj.) complex or difficult to understand
  • comply

    (v.) act in accordance with rules or requests
  • compose

    (v.) create or put together; write or produce
  • comprehend

    (v.) understand fully or grasp meaning
  • comprehensible

    (adj.) understandable or graspable
  • comprehensive

    (adj.) complete or all-encompassing
  • concept

    (n.) abstract idea or general notion
  • concurrent

    (adj.) happening at the same time
  • condiment

    (n.) flavoring added to food
  • condition

    (n.) state or situation of something
  • conductivity

    (n.) ability to transmit heat or electricity
  • confinement

    (n.) restriction within limits
  • confining

    (adj.) restrictive, limiting
  • confirm

    (v.) establish truth or correctness
  • conformity

    (n.) compliance with rules or standards
  • congratulation

    (n.) expression of happiness for someone
  • congruity

    (n.) harmony or agreement
  • connoisseur

    (n.) expert judge of taste or art
  • consecutive

    (adj.) following in unbroken sequence
  • consequence

    (n.) result or effect of an action
  • consequent

    (adj.) resulting; following as an effect
  • conservative

    (adj.) favoring traditional views
  • conserve

    (v.) maintain or protect from harm
  • considerably

    (adv.) to a great extent
  • considerate

    (adj.) thoughtful of others
  • consistent

    (adj.) unchanging; reliable
  • constrain

    (v.) restrict or limit
  • constraint

    (n.) limiting factor or restriction
  • consult

    (v.) seek advice or information
  • container

    (n.) object that holds something
  • contaminate

    (v.) make impure or dirty
  • content

    (n.) subject matter or substance
  • contented

    (adj.) feeling happiness with what is held
  • contiguous

    (adj.) sharing a common border
  • continuum

    (n.) continuous sequence or whole
  • contrast

    (v.) difference between two things
  • convenience

    (n.) usefulness or comfort
  • convention

    (n.) custom or accepted practice
  • convert

    (n.) change into different form
  • cooperate

    (v.) work together willingly
  • corn

    (n.) grain plant used for food
  • cosmopolitan

    (adj.) worldly or globally oriented
  • counseling

    (n.) providing guidance or therapy
  • couple

    (n.) pair or duo of things
  • craft

    (n.) skill in making things
  • crash

    (n.) sudden destructive collision
  • crayon

    (n.) coloring tool made of wax
  • creek

    (n.) natural stream of water
  • crippling

    (adj.) severely damaging or disabling
  • critical

    (adj.) of great importance; judgmental
  • critique

    (n.) detailed analysis or review
  • crossbones

    (n.) skull and crossed bones symbol
  • crossbreeding

    (n.) mating different species or varieties
  • crossing

    (n.) a place where roads or railway lines cross
  • crumple

    (v.) crumbling or crushing into folds
  • crush

    (v.) squash forcefully
  • cube

    (n.) solid square with six equal sides
  • curiosity

    (n.) desire to learn or know
  • current

    (n.) flow of water or electricity
  • cushion

    (n.) soft padding for comfort or protection
  • custom

    (n.) traditional practice or habit
  • customarily

    (adv.) usually or traditionally
  • cyclone

    (n.) large rotating storm
  • dart

    (v.) quick short movement or thrown object
  • dawn

    (n.) beginning of the day
  • dawning

    (n.) start or emergence of something new
  • dearth

    (n.) lack or scarcity of something
  • debris

    (n.) rubble or scattered fragments
  • decadent

    (adj.) overly luxurious or degenerated
  • decent

    (adj.) humane or modest; acceptable
  • declare

    (v.) announce or state openly
  • decline

    (n.) refuse or decrease in amount
  • defend

    (v.) protect against attack or criticism
  • deference

    (n.) respect for others' wishes
  • deferential

    (adj.) showing respectful submission
  • deficiency

    (n.) lack or shortage
  • definitely

    (adv.) absolutely; without doubt
  • dehydrate

    (v.) remove water from
  • dehydrated

    (adj.) having lost water
  • deign

    (v.) lower oneself to do something
  • delegate

    (n.) assign responsibility to others
  • demobilize

    (v.) discharge from military or work
  • demonstrate

    (v.) show clearly or prove
  • denote

    (v.) indicate or signify
  • dense

    (adj.) closely packed or thick
  • density

    (n.) mass per unit volume
  • depart

    (v.) leave or go away
  • dependable

    (adj.) reliable or trustworthy
  • dependence

    (n.) reliance on someone or something
  • dependent

    (adj.) contingent on something else
  • depict

    (v.) represent visually or describe
  • deposit

    (n.) money placed into an account
  • depressed

    (adj.) feeling extreme sadness
  • derivative

    (adj.) not original; taken from another
  • desalination

    (n.) removing salt from water
  • deserted

    (adj.) empty; abandoned
  • desirable

    (adj.) worth having or wanting
  • desolate

    (adj.) hollow, bleak, or deserted
  • desperately

    (adv.) in extreme urgency or need
  • despoiler

    (n.) one who strips or ruins
  • destination

    (n.) final point or goal
  • deterrent

    (n.) something that discourages
  • devastate

    (v.) cause severe destruction
  • device

    (n.) tool or gadget for a purpose
  • diagonal

    (n.) line connecting opposite corners
  • dialect

    (n.) linguistic regional variation
  • dietetics

    (n.) science of nutrition and diet
  • differentiate

    (v.) recognize differences between things
  • diffuse

    (v.) spread widely or thinly
  • digress

    (v.) leave main topic temporarily
  • digression

    (n.) departure from main subject
  • dilute

    (v.) make weaker or thinner
  • dilution

    (n.) process of making weaker
  • dim

    (adj.) lack brightness or clarity
  • diplomacy

    (n.) managing international relations tactfully
  • diplomatic

    (adj.) related to international diplomacy
  • disastrous

    (adj.) causing great damage or failure
  • discard

    (v.) get rid of something
  • discipline

    (n.) training to correct behaviors
  • discourse

    (n.) formal discussion or communication
  • discrete

    (adj.) separate and distinct
  • disgrace

    (n.) loss of reputation or respect
  • disgust

    (n.) strong feelings of dislike
  • disgusted

    (adj.) feeling strong aversion
  • dismiss

    (v.) send away or terminate
  • disrupt

    (v.) interrupt or disturb
  • dissipate

    (v.) scatter or disperse
  • dissipated

    (adj.) indulging excessively in pleasures
  • distance

    (n.) space between two points
  • distend

    (v.) become swollen or expanded
  • distinctive

    (adj.) unique or characteristic
  • distort

    (v.) twist out of shape
  • district

    (n.) administrative area or region
  • disturb

    (v.) interrupt peace or order
  • diversification

    (n.) adding variety or different types
  • diversified

    (adj.) including many different elements
  • diversify

    (v.) make more varied
  • divide

    (v.) split into parts
  • doll

    (n.) toy representing a human figure
  • domesticated

    (adj.) tamed and raised by humans
  • dormant

    (adj.) inactive or in sleep mode
  • dot

    (n.) small round spot
  • draft

    (n.) preliminary version of a document
  • dragonfly

    (n.) insect with elongated body and wings
  • dramatic

    (adj.) causing onstage or emotional impact
  • dramatically

    (adj.) in a striking or theatrical manner
  • dramatize

    (v.) make into a play or story
  • dreadful

    (adj.) causing fear or horror
  • driftwood

    (n.) wood floating on water
  • drowsy

    (adj.) feeling sleepy or lethargic
  • dull

    (adj.) lacking brightness or interest
  • dump

    (v.) carelessly discard or unload
  • duplicate

    (n.) copy exactly or closely
  • dwell

    (v.) live or stay somewhere
  • dwelling

    (n.) place of residence
  • dye

    (n.) coloring material or process
  • eclecticism

    (n.) choosing diverse styles or sources
  • economical

    (adj.) cost-effective or thrifty
  • economize

    (v.) saving money or resources
  • ecosystem

    (n.) interacting community of organisms and environment
  • edifice

    (n.) building or large structure
  • elaborate

    (v.) involving many details
  • elasticity

    (n.) ability to return to original shape
  • election

    (n.) selecting leaders by voting
  • elixir

    (n.) legendary potion or remedy
  • elliptical

    (adj.) shaped like an oval or ellipse
  • emblem

    (n.) symbol representing something
  • emboss

    (v.) raise design on surface
  • emigrant

    (n.) person who leaves their country
  • eminent

    (adj.) famous and respected
  • emotional

    (adj.) relating to feelings
  • emphasis

    (n.) special importance or focus
  • emphasize

    (v.) highlight or stress
  • employ

    (v.) hire or use someone's services
  • employee

    (n.) person working for a company
  • encompass

    (v.) surround and include
  • endanger

    (v.) put at risk of harm
  • endless

    (adj.) without limit or end
  • endure

    (v.) withstand hardship over time
  • enormous

    (adj.) very large in size or amount
  • ensemble

    (n.) group performing together
  • ephemeral

    (adj.) lasting a very short time
  • equal

    (adj.) being the same in quantity or value
  • escalate

    (v.) increase or intensify
  • escalator

    (n.) rising moving staircase
  • evaporate

    (v.) turn from liquid into vapor
  • eventual

    (adj.) ultimate or final
  • evidence

    (n.) proof that supports a fact
  • eviscerate

    (v.) remove internal organs or damage severely
  • exalted

    (adj.) higher in rank or rank
  • excavate

    (v.) dig out from the ground
  • excellent

    (adj.) of very high quality
  • exchange

    (n.) swap or trade
  • excitement

    (n.) state of high enthusiasm
  • excursion

    (n.) short trip or outing
  • exemplary

    (adj.) model of excellence
  • exemplify

    (v.) illustrate or clarify by example
  • exhaust

    (v.) drain of energy or resources
  • exhibit

    (v.) show or display publicly
  • exhilarate

    (v.) make extremely happy
  • expertise

    (n.) specialized skill or knowledge
  • exploitation

    (n.) using for personal benefit
  • exploration

    (n.) travel in search of new info
  • explorer

    (n.) person who investigates unknown
  • explosive

    (adj.) sudden burst or detonation
  • exposure

    (n.) being exposed to conditions
  • extension

    (n.) act of expanding or lengthening
  • extensive

    (adj.) covering a large area or amount
  • facet

    (n.) one side or aspect of something
  • facility

    (n.) place or equipment for a specific purpose
  • famine

    (n.) severe shortage of food causing hunger
  • fashion

    (n.) current popular style or trend
  • fashionable

    (adj.) in style or trendy
  • fatigue

    (n.) tiredness resulting from work or exertion
  • feeble

    (adj.) lacking strength or effectiveness
  • fermentation

    (n.) process producing alcohol or acids via microbes
  • ferry

    (n.) boat used to transport people or goods
  • fertile

    (adj.) capable of producing abundant crops
  • fiction

    (n.) imaginary storytelling or novel
  • figurehead

    (n.) decorative carved figure on ship's prow; symbol
  • filter

    (n.) device removing impurities from liquids or air
  • finance

    (n.) management of money, investments, and banking
  • financing

    (n.) providing funds for a project or purchase
  • flabby

    (adj.) lacking firmness or muscle tone
  • flake

    (n.) thin, flat piece broken off from something
  • flare

    (v.) sudden burst of bright light or flame
  • flashlight

    (n.) portable battery-powered light source
  • flavor

    (n.) characteristic taste of food or drink
  • flavoring

    (n.) additive that enhances taste
  • fleeting

    (adj.) lasting for a very short time
  • flock

    (v.) group of birds or animals
  • fluctuate

    (v.) to vary or change irregularly
  • flyspeck

    (n.) very small spot or mark
  • foghorn

    (n.) loud horn used on ships as a warning
  • folklore

    (n.) cultural stories and traditions passed down
  • foment

    (v.) to incite or stir up undesirable feelings
  • forge

    (n.) to create or make, especially with heat
  • fossil

    (n.) preserved remains of ancient plants or animals
  • fossilized

    (adj.) turned into stone or mineral over time
  • fraction

    (n.) small part of a whole number or amount
  • fragrance

    (n.) pleasant smell or aroma
  • frame

    (n.) supporting structure of a building or picture
  • framework

    (n.) basic structure or system guiding development
  • freight

    (n.) goods transported by ship, truck, or train
  • frugal

    (adj.) economical, avoiding waste or excess
  • frugality

    (n.) the quality of being economical with money or food; thriftiness
  • fruitless

    (adj.) without positive results or success
  • fumigate

    (v.) to disinfect using fumes or smoke
  • functional

    (adj.) designed to be practical and work properly
  • furnishing

    (n.) furniture and decor in a room
  • fusion

    (n.) combining two or more things into one
  • galvanization

    (n.) coating with zinc to prevent rust
  • galvanize

    (v.) to stimulate or excite into action
  • garbage

    (n.) waste material or refuse
  • gaudy

    (adj.) extravagantly bright or showy
  • gauge

    (n.) measure or estimate of quantity or size
  • gear

    (n.) equipment or machinery; a set of tools
  • genre

    (n.) category or type of artistic work
  • glacier

    (n.) large slowly moving mass of ice
  • glaze

    (n.) to cover with a glossy, shiny surface
  • glazed

    (adj.) lacquered with a smooth, shiny coating
  • glide

    (v.) to move smoothly and continuously
  • glimpse

    (v.) brief or quick look
  • global

    (adj.) relating to the entire world
  • glossy

    (adj.) having a shiny, smooth surface
  • glowing

    (adj.) luminous, shining brightly
  • gossip

    (n.) informal sharing of personal news
  • govern

    (v.) to control or rule officially
  • graft

    (v.) corruption or illegal transfer of money
  • grand

    (adj.) spectacular or impressive in appearance
  • granite

    (n.) hard, durable igneous rock
  • graphic

    (adj.) relating to visual art or images
  • graphite

    (n.) carbon-based material used in pencils
  • grasp

    (v.) to seize or hold firmly
  • grasshopper

    (n.) insect known for its jumping
  • grateful

    (adj.) feeling thankful or appreciative
  • gravity

    (n.) force that pulls objects toward earth
  • graze

    (v.) to feed on grass or to touch lightly
  • greedy

    (adj.) intensely eager for more than needed
  • gregarious

    (adj.) enjoying socializing with others
  • grim

    (adj.) serious, forbidding, or uninviting
  • grope

    (v.) to feel about blindly or uncertainly
  • grumble

    (v.) to complain or mutter in annoyance
  • gulp

    (v.) to swallow quickly or in large amounts
  • gymnastics

    (n.) physical exercises requiring skill
  • habit

    (n.) routine behavior regularly practiced
  • habitat

    (n.) natural environment of an organism
  • hallmark

    (n.) characteristic sign or feature
  • halt

    (v.) to stop movement or progress
  • harmless

    (adj.) causing no injury or damage
  • harmonica

    (n.) portable wind instrument
  • harness

    (n.) strap or device to control or hold something
  • harsh

    (adj.) unpleasantly severe or rough
  • hatchet

    (n.) small axe used for chopping
  • haunted

    (adj.) visited repeatedly by ghosts or spirits
  • helpless

    (adj.) unable to help oneself
  • herder

    (n.) person who tends to livestock
  • hesitant

    (adj.) uncertain or unsure about action
  • hibernate

    (v.) to spend winter in dormant state
  • hibernation

    (n.) late winter dormancy in animals
  • hoe

    (v.) tool for farming or gardening
  • hollow

    (adj.) empty space inside something
  • homesick

    (adj.) longing for one's home
  • horror

    (n.) intense fear or disgust
  • hostile

    (adj.) unfriendly or confrontational
  • hostility

    (n.) unfriendliness or opposition
  • hummingbird

    (n.) small bird able to hover midair
  • humorous

    (adj.) causing laughter or amusement
  • hunger

    (n.) feeling of needing or wanting food
  • hurl

    (v.) throw with force or violence
  • husk

    (n.) outer shell of a seed or fruit
  • hydrosphere

    (n.) all water on earth's surface and in atmosphere
  • hypothesize

    (v.) form a theory based on limited evidence
  • icon

    (n.) symbol representing an idea or object
  • identifiable

    (adj.) able to be recognized or distinguished
  • identification

    (n.) process of recognizing or naming someone or something
  • ideology

    (n.) system of beliefs or ideas guiding behavior
  • ignorant

    (adj.) lacking knowledge or awareness
  • illegible

    (adj.) difficult or impossible to read
  • illiterate

    (adj.) unable to read or write
  • illustrate

    (v.) explain with pictures or examples
  • image

    (n.) visual representation of a person or thing
  • imaginary

    (adj.) created by the mind; not real
  • immobile

    (adj.) not moving; motionless
  • immobilize

    (v.) prevent movement of something or someone
  • immune

    (adj.) protected from harm or disease
  • impart

    (v.) to give or bestow information or knowledge
  • implement

    (n.) tools or equipment for a task
  • implication

    (n.) possible consequence or effect
  • impractical

    (adj.) not realistic or feasible
  • improbable

    (adj.) unlikely to happen
  • inaccessible

    (adj.) impossible to reach or enter
  • inactivate

    (v.) make inactive or nonfunctional
  • inappropriate

    (adj.) unsuitable or not proper
  • inaugurate

    (v.) begin officially or formally
  • incandescent

    (adj.) emitting light from heat; brilliantly bright
  • incense

    (n.) scented substance burned for fragrance
  • incentive

    (n.) motivation to do something; encouragement
  • incessant

    (adj.) continuing without interruption
  • inclined

    (adj.) tending toward; leaning or predisposed
  • inclusive

    (adj.) covering or including everything concerned
  • inconclusive

    (adj.) not leading to a definite conclusion
  • incredible

    (adj.) unbelievable; astonishing
  • indefinite

    (adj.) without clear limit or end
  • indicative

    (adj.) suggesting or pointing to something else
  • indifference

    (n.) lack of interest or concern
  • ineligible

    (adj.) not suitable or qualified for something
  • inevitably

    (adv.) sure to happen; unavoidable
  • inferiority

    (n.) lower rank or status; subordinate position
  • infertile

    (adj.) unable to produce offspring or crops
  • inflexible

    (adj.) unwilling to change or adapt
  • inhabitant

    (n.) resident of a place
  • inhibit

    (v.) hinder or restrain an action or process
  • injustice

    (n.) unfair or wrongful treatment
  • insight

    (n.) deep understanding of a person or thing
  • insist

    (v.) demand firmly or persistently
  • inspiration

    (n.) motivation or creative stimulation
  • inspiring

    (adj.) causing enthusiasm or motivation
  • install

    (v.) set up for use or operation
  • instinctive

    (adj.) prompted by instinct rather than thought
  • instruct

    (v.) teach or provide information
  • instructive

    (adj.) providing useful knowledge or lessons
  • instrument

    (n.) tool used to perform a task
  • instrumental

    (adj.) important in achieving a result
  • instrumentalist

    (n.) performer who plays an instrument
  • intact

    (adj.) whole; not damaged or broken
  • intelligible

    (adj.) able to be understood
  • intensify

    (v.) make stronger or more extreme
  • intensive

    (adj.) requiring a great deal of effort or attention
  • interactive

    (adj.) allowing two-way communication or action
  • interest

    (n.) enthusiasm or curiosity about something
  • interrupt

    (v.) stop or break into a process
  • intricacy

    (n.) complexity or detailedness
  • intricately

    (adv.) in a detailed or complex manner
  • intruder

    (n.) person who enters without permission
  • involuntary

    (adj.) done without conscious control
  • ironic

    (adj.) expressing irony; opposite of expected
  • irrevocable

    (adj.) impossible to undo or change
  • irrigate

    (v.) supply water to land or crops
  • isolate

    (v.) separate from others; set apart
  • issue

    (n.) distribute or provide; a problem
  • iterate

    (v.) repeat a process or statement
  • itinerant

    (adj.) traveling from place to place
  • jagged

    (adj.) having rough, sharp edges
  • jelly

    (n.) soft, gel-like substance
  • jog

    (v.) run at a slow, steady pace
  • jolt

    (n.) sudden jerking or shaking motion
  • journalist

    (n.) person who reports news stories
  • justly

    (adv.) fairly; in a just manner
  • juvenile

    (n.) immature or childish
  • ken

    (n.) knowledge or understanding of something
  • kymograph

    (n.) instrument recording physiological changes
  • laborer

    (n.) worker engaged in manual work
  • lace

    (v.) decorative fabric or string for tying
  • landing

    (n.) area where something lands or touches ground
  • landscape

    (n.) landscape scenery; view of natural features
  • landslide

    (n.) sudden movement of earth downhill
  • lash

    (n.) strike or hit; a whip・s action
  • laundry

    (n.) clothes and linens that need washing
  • lave

    (v.) wash over or bathe; wash or rinse
  • layer

    (n.) one thickness of material piled on another
  • layman

    (n.) non-expert or amateur
  • lease

    (n.) legal agreement for temporary use of property
  • leisurely

    (adj.) freedom from work; free time
  • liberty

    (n.) freedom from restriction or control
  • likewise

    (adv.) in addition; similarly
  • limestone

    (n.) chemical sedimentary rock composed of calcium carbonate
  • literally

    (adv.) exactly; word for word
  • lithosphere

    (n.) earth's outer solid shell
  • livelihood

    (n.) means of supporting life or existence
  • load

    (n.) a heavy or bulk of something; weight.
  • location

    (n.) specific place or position.
  • locomotion

    (n.) movement from one place to another.
  • lodge

    (n.) shelter or small house in the woods.
  • loose

    (adj.) not tight or firmly fixed.
  • lumber

    (n.) wood prepared for building.
  • lumbering

    (adj.) walking heavily or clumsily.
  • luminous

    (adj.) emitting light; bright.
  • lure

    (n.) attract or tempt skillfully.
  • luster

    (n.) shine or gloss; gentle brightness.
  • luxurious

    (adj.) extremely comfortable or elegant.
  • luxury

    (n.) high-quality and expensive comfort.
  • lyric

    (n.) poetry expressing personal feelings.
  • maize

    (n.) corn; grain used for food.
  • majestic

    (adj.) impressive; grand; dignified.
  • majority

    (n.) more than half; greater part.
  • malign

    (v.) critisize or hurt reputation.
  • mall

    (n.) large shopping center.
  • malnutrition

    (n.) poor nutrition; inadequate diet.
  • mammal

    (n.) warm-blooded vertebrate with fur.
  • manifestation

    (n.) display or outward expression.
  • march

    (n.) walk with steady steps.
  • marine

    (adj.) related to the sea.
  • markedly

    (adv.) significantly; noticeably.
  • marsh

    (n.) wetland area with water and plants.
  • marvel

    (n.) wonder or astonishing thing.
  • marvelous

    (adj.) extremely good or astonishing.
  • match

    (n.) pair that goes together or contest.
  • matchstick

    (n.) small stick for lighting fire.
  • mathematics

    (n.) study of numbers and shapes.
  • meaningful

    (adj.) having purpose or significance.
  • mediate

    (v.) intervene to resolve disputes.
  • medieval

    (adj.) relating to middle ages.
  • medium

    (n.) average size or amount.
  • melody

    (n.) pleasant tune or sequence of notes.
  • melt

    (v.) change from solid to liquid.
  • membrane

    (n.) thin layer covering something.
  • memorable

    (adj.) worth remembering; notable.
  • memorandum

    (n.) brief written note or message.
  • mend

    (v.) repair or fix damage.
  • mention

    (v.) refer briefly or casually.
  • mercantile

    (adj.) related to trade or merchants.
  • merit

    (n.) valuable quality or achievement.
  • meteorite

    (n.) space rock that lands on earth.
  • meteorologist

    (n.) weather forecast expert.
  • methodically

    (adv.) in an organized or systematic way.
  • methodology

    (n.) system of methods used.
  • microcosm

    (n.) small representation of a larger system.
  • microscopic

    (adj.) visible only with a microscope.
  • migratory

    (adj.) moving seasonally from place to place.
  • millennium

    (n.) period of one thousand years.
  • miniature

    (adj.) very small scale replica.
  • minimal

    (adj.) least possible; small amount.
  • minimum

    (adj.) smallest amount or degree.
  • minuscule

    (adj.) very tiny or small.
  • miracle

    (n.) wonderful event beyond natural laws.
  • mirage

    (n.) optical illusion caused by heat.
  • miserable

    (adj.) unhappy or uncomfortable.
  • misfortune

    (n.) bad luck or unfortunate event.
  • mistrust

    (n.) distrust or lack of confidence.
  • moat

    (n.) deep trench around a castle.
  • mock

    (v.) ridicule or imitate derisively.
  • moderate

    (adj.) average in amount or intensity.
  • moist

    (adj.) slightly wet; damp.
  • moisture

    (n.) water present in small amounts.
  • molecule

    (n.) smallest unit of a substance.
  • monument

    (n.) structure to honor or commemorate.
  • mortar

    (n.) building material made of cement.
  • motionless

    (adj.) not moving; still.
  • mournful

    (adj.) feeling or expressing sadness.
  • mulberry

    (n.) type of fruit-bearing tree.
  • mural

    (n.) large painting on a wall.
  • mushroom

    (n.) fungi with a cap and stalk.
  • mythology

    (n.) study of myths and legends.
  • narrator

    (n.) person telling a story.
  • naturalistic

    (adj.) realistic depiction of nature.
  • navigate

    (v.) find one's way or route.
  • negligible

    (adj.) too small to matter.
  • niche

    (n.) suitable position or role.
  • nonfiction

    (n.) based on facts; real events.
  • nonsense

    (n.) lacking meaning or sense.
  • normally

    (adv.) usually or typically.
  • notable

    (adj.) worth paying attention to.
  • notate

    (v.) mark or write musical notes.
  • notation

    (n.) system of written symbols.
  • notch

    (n.) v-shaped cut or indentation.
  • oath

    (n.) formal promise or vow.
  • obedient

    (adj.) willing to follow instructions.
  • obligated

    (adj.) bound by duty or obligation.
  • obsession

    (n.) persistent and consuming preoccupation.
  • obstruct

    (v.) block or get in the way of.
  • occasionally

    (adv.) sometimes; not regularly.
  • occupant

    (n.) person who resides somewhere.
  • occur

    (v.) take place or happen.
  • odor

    (n.) smell or scent.
  • opposite

    (n.) exact different; facing each other.
  • oral

    (adj.) relating to the mouth or speaking.
  • orbit

    (v.) path of an object around a star or planet.
  • ordeal

    (n.) severe or painful experience.
  • organic

    (adj.) relating to living matter.
  • ounce

    (n.) unit of weight equal to 1/16 pound.
  • outcome

    (n.) result of a situation or event
  • outgoing

    (adj.) sociable and friendly person
  • outlying

    (adj.) situated on outskirts or fringe
  • overbalance

    (v.) to tip or weigh more heavily
  • overhaul

    (v.) to repair or renovate thoroughly
  • overlap

    (n.) to extend over or cover part of something
  • oversee

    (v.) to supervise or manage others
  • overtire

    (v.) to become extremely tired
  • overturn

    (v.) to flip or turn upside down
  • ozone

    (n.) a gas protecting earth's atmosphere
  • paddler

    (n.) someone who propels a boat with a paddle
  • painstaking

    (adj.) done with great care and effort
  • pane

    (n.) a flat sheet of glass in a window
  • panic

    (n.) sudden overwhelming fear or anxiety
  • pants

    (n.) trousers or slacks worn on the legs
  • parachute

    (n.) device for slowed descent from sky
  • paraphrase

    (v.) to restate in different words
  • passion

    (n.) intense emotion or enthusiasm
  • passionate

    (adj.) showing strong emotions or enthusiasm
  • path

    (n.) a route or trail for walking
  • patroller

    (n.) one who monitors or guards an area
  • patronage

    (n.) support provided by a patron
  • paucity

    (n.) smallness or scarcity of something
  • pauper

    (n.) extremely poor person
  • peak

    (n.) the highest point or summit
  • pebble

    (n.) small rounded stone
  • peculiar

    (adj.) strange or unusual
  • pedagogy

    (n.) art or science of teaching
  • penal

    (adj.) relating to punishment or prisons
  • penchant

    (n.) a strong liking or preference
  • penetrating

    (adj.) able to pierce or see through
  • perception

    (n.) the way one perceives or understands
  • percolate

    (v.) to filter gradually through a barrier
  • percussion

    (adj.) musical instruments struck to produce sound
  • perennially

    (adv.) lasting for many years; constantly
  • periodic

    (adj.) recurring at regular intervals
  • permanent

    (adj.) lasting forever or a long time
  • permeate

    (v.) to spread or soak through
  • perpendicular

    (adj.) at a right angle; vertical
  • perspire

    (v.) to sweat through the skin
  • philology

    (n.) study of language in historical texts
  • photosensitive

    (adj.) reacting to light
  • photosynthesis

    (n.) process of converting light to energy in plants
  • picturesque

    (adj.) visually attractive or charming
  • pigment

    (n.) substance that gives color to material
  • pinpoint

    (v.) to locate precisely or small dot
  • pioneer

    (n.) to be among first to explore or develop
  • pique

    (n.) to stimulate interest or curiosity
  • plagiarism

    (n.) copying others' work without credit
  • plain

    (n.) simple or without decoration
  • platform

    (n.) a raised surface for speakers or trains
  • playwright

    (n.) writer of plays or dramas
  • plump

    (adj.) comfortably full or rounded
  • polarize

    (v.) to divide into opposing groups
  • polish

    (v.) to make smooth or shiny
  • poll

    (n.) survey of opinions or votes
  • pollination

    (n.) transfer of pollen to plant for reproduction
  • pollutant

    (n.) harmful substance in environment
  • popcorn

    (n.) puffy snack made from heated corn
  • porcupine

    (n.) rodent with sharp quills on its back
  • pore

    (n.) tiny opening in skin or surface
  • portion

    (n.) part of a whole; serving or piece
  • postage

    (n.) fee for mailing letters or packages
  • poster

    (n.) printed image posted publicly
  • postgraduate

    (n.) someone studying after a degree
  • pottery

    (n.) objects made from clay and baked
  • pound

    (n.) unit of weight or to strike heavily
  • practically

    (adv.) nearly or almost what is needed
  • prairie

    (n.) large open grassy area
  • precarious

    (adj.) uncertain or risky situation
  • precipitation

    (n.) water falling from sky; rainfall
  • predict

    (v.) to say what will happen in future
  • premature

    (adj.) happening too early; untimely
  • preoccupation

    (n.) absorbed focus or concern
  • preponderance

    (n.) greater quantity or importance
  • prerequisite

    (n.) requirement before doing something
  • prescribed

    (adj.) officially recommended or set
  • prescription

    (n.) doctor・s medical instruction
  • presence

    (n.) state of existing or being present
  • preservative

    (n.) substance used to preserve food
  • preserve

    (v.) to keep intact or save from decay
  • pressure

    (n.) force exerted on object
  • presumable

    (adj.) likely or probably true
  • prevalent

    (adj.) commonly occurring or accepted
  • prey

    (n.) animal hunted for food by predators
  • primal

    (adj.) original or fundamental
  • pristine

    (adj.) in pure or original condition
  • privilege

    (n.) special right or advantage
  • proceeding

    (n.) an event or series of actions
  • prod

    (v.) to poke or urge to move
  • proficiency

    (n.) skill or competence in something
  • progression

    (n.) gradual development or movement
  • prohibitive

    (adj.) forbidding or restraining
  • prooficient

    (adj.) erroneously spelled; likely should be proficient
  • propellant

    (n.) substance that fuels a rocket or engine
  • proposal

    (n.) plan or suggestion for consideration
  • prosecute

    (v.) to bring legal action against someone
  • prospect

    (v.) likelihood of future success
  • prospector

    (n.) person searching for minerals; gemstone or metal.
  • prosperous

    (adj.) successful; financially thriving or flourishing.
  • provision

    (n.) supply of necessities or food; a condition.
  • provocation

    (n.) act of provoking; stimulus to anger or action.
  • provoke

    (v.) to incite or stimulate; to anger or arouse.
  • proximity

    (n.) nearness; closeness in space or time.
  • psychology

    (n.) study of mind and behavior.
  • publicity

    (n.) public visibility; attention or advertising.
  • puddle

    (n.) small pool of water; muddy or dirty spot.
  • pumpkin

    (n.) large orange gourd; used for food or decoration.
  • pungent

    (adj.) having sharp, strong smell or taste.
  • qualm

    (n.) feeling of doubt or uneasiness.
  • quarry

    (n.) hunted animal; mineral or excavation site.
  • questionable

    (adj.) doubtful; not certain or clear.
  • radiate

    (v.) to emit or send out rays or heat.
  • radiation

    (n.) energy emitted as rays or particles.
  • rage

    (n.) intense anger; violent fury.
  • ragged

    (adj.) torn; having rough or uneven edges.
  • raid

    (n.) sudden attack or incursion; theft.
  • ramble

    (v.) to wander aimlessly; long, confused speech.
  • rampant

    (adj.) unchecked; spreading wildly.
  • rare

    (adj.) uncommon; infrequent.
  • rarefy

    (v.) to make less dense or thick.
  • ration

    (v.) fixed portion of supplies; to distribute.
  • ravel

    (v.) to tangle or unravel; to confuse.
  • rayon

    (n.) synthetic fiber made from cellulose.
  • rear

    (n.) back part of something; to rise up.
  • rebel

    (v.) to oppose authority; person resisting control.
  • rebellious

    (adj.) resisting authority or control.
  • rebuke

    (v.) to criticize or reprimand sharply.
  • recall

    (v.) to remember; to call back.
  • receptionist

    (n.) person who greets visitors or callers.
  • recession

    (n.) economic decline; withdrawal.
  • reckless

    (adj.) without caution; careless or rash.
  • reclamation

    (n.) process of converting wasteland; recovery.
  • recommend

    (v.) to suggest or endorse favorably.
  • reconstruction

    (n.) rebuilding after damage or destruction.
  • rectify

    (v.) to correct or make right.
  • recurring

    (adj.) happening repeatedly; periodic.
  • recycle

    (v.) to reuse materials; process again.
  • reed

    (n.) tall grass, flexible and woody.
  • refinement

    (n.) improvement or elegance; purification.
  • refraction

    (n.) bending of light passing through medium.
  • refurbish

    (v.) to restore or redecorate; renovate.
  • regardless

    (adj.) without considering; anyway.
  • regenerate

    (v.) to restore or grow anew.
  • regulatory

    (adj.) relating to rules or regulations.
  • rehabilitate

    (v.) to restore to good condition; re-educate.
  • reign

    (n.) period of rule; royal authority.
  • reinforce

    (v.) to strengthen or support.
  • reiterate

    (v.) to repeat for emphasis.
  • reject

    (v.) to refuse or dismiss; to throw away.
  • relaxation

    (n.) restful activity; state of leisure.
  • relentless

    (adj.) persistent; unyielding.
  • reliability

    (n.) trustworthiness; consistency of performance.
  • reliable

    (adj.) dependable; trustworthy.
  • reliant

    (adj.) dependent on; trusting in.
  • relic

    (n.) an ancient object; historical item.
  • reluctant

    (adj.) hesitant; unwilling.
  • remainder

    (n.) what is left after removal.
  • remaining

    (n.) still present; leftover.
  • remarkable

    (adj.) extraordinary; worthy of notice.
  • remedy

    (v.) cure or solution; to fix or correct.
  • remnant

    (n.) remaining part or fragment.
  • renaissance

    (n.) cultural revival; rebirth.
  • rendition

    (n.) performance; interpretation.
  • renew

    (v.) to make new again; to continue.
  • renovate

    (v.) to restore or repair; update.
  • renunciation

    (n.) rejection or abandonment.
  • reorient

    (v.) to change direction or focus.
  • repertory

    (n.) collection of works or themes.
  • replace

    (v.) to substitute or set anew.
  • represent

    (v.) to symbolize or stand for.
  • repute

    (v.) reputation or regard.
  • reputed

    (adj.) generally thought; supposed.
  • reservoir

    (n.) storage for water or other fluids.
  • residual

    (adj.) remaining after removal.
  • residue

    (n.) leftover substance or remains.
  • resist

    (v.) to withstand or oppose.
  • resistant

    (adj.) able to withstand or oppose.
  • resonance

    (n.) sound or effect that continues.
  • resort

    (n.) popular destination or refuge; to turn to.
  • respectively

    (adv.) in corresponding order.
  • respond

    (v.) to reply or answer.
  • retail

    (adj.) selling goods directly to consumers.
  • retract

    (v.) to withdraw or take back.
  • retrospect

    (n.) looking back; review of past.
  • revere

    (v.) to regard with deep respect.
  • reverent

    (adj.) showing deep respect or veneration.
  • revive

    (v.) to restore consciousness or strength.
  • rifle

    (n.) firearm; to search thoroughly.
  • rift

    (n.) a crack or split; disagreement.
  • rigid

    (adj.) stiff; inflexible.
  • rigidity

    (n.) stiffness or inflexibility.
  • rigor

    (n.) strictness; severity.
  • riot

    (n.) chaotic public disturbance; uprising.
  • rip

    (v.) to tear or split apart.
  • roam

    (v.) to wander without purpose.
  • robust

    (adj.) strong and healthy; sturdy.
  • rod

    (n.) thin straight stick or bar.
  • roost

    (n.) perch for birds; to settle or rest.
  • rotation

    (n.) the act of rotating around an axis or center
  • routine

    (n.) regular procedure or habit followed routinely
  • rugged

    (adj.) rough, durable, or sturdy in texture or construction
  • ruin

    (n.) complete destruction or decay of something
  • rumble

    (v.) low, continuous, deep sound or noise
  • rustic

    (adj.) relating to the countryside or rural life
  • rustproof

    (adj.) resistant to rust or corrosion
  • saline

    (adj.) containing salt or salty in nature
  • sample

    (n.) a small part or quantity representing the whole
  • sap

    (n.) the fluid that circulates within a plant
  • saturate

    (v.) to soak completely, filling to capacity
  • save

    (v.) to rescue or keep safe; to set aside
  • savings

    (n.) money stored for future use
  • scaled

    (adj.) marked with scales or a series of levels
  • scapegoat

    (n.) person blamed for others' faults
  • scatter

    (v.) to spread randomly over an area
  • scene

    (n.) setting or environment of an event
  • scour

    (v.) to clean or search thoroughly
  • scramble

    (n.) to move hurriedly or confusedly
  • scrap

    (v.) small piece or leftover material
  • screen

    (n.) a surface that blocks or filters light
  • sculpture

    (n.) art of shaping material into art
  • seamount

    (n.) underwater mountain rising from ocean floor
  • seaport

    (n.) town or place with a harbor for ships
  • secret

    (n.) hidden or concealed information
  • sect

    (n.) small religious or ideological group
  • secular

    (adj.) non-religious; worldly
  • sedentary

    (adj.) sitting habitually; inactive
  • sedimentary

    (adj.) formed by depositing material over time
  • seduce

    (v.) to lure or entice into temptation
  • seedling

    (n.) young plant grown from seed
  • segment

    (n.) part separated from the whole
  • semester

    (n.) half-year academic term
  • semiarid

    (adj.) climate with light rainfall
  • sensational

    (adj.) causing great excitement or interest
  • sensitivity

    (n.) ability to respond to stimuli
  • sentimentalism

    (n.) excessive emotional attachment
  • separate

    (v.) to divide into parts or sections
  • sequence

    (n.) ordered series of events or items
  • serrated

    (adj.) having a notched or sawtooth edge
  • severe

    (adj.) very strict, harsh, or intense
  • sewer

    (n.) underground conduit for waste water
  • sewerage

    (n.) system for removing waste from buildings
  • sharply

    (adjv.) in a sudden or abrupt manner
  • sheer

    (adj.) pure, steep, or absolute
  • shell

    (v.) hard outer covering of some animals
  • shelter

    (n.) structure that provides protection
  • shingle

    (n.) small flat stone or a row of such stones
  • shipment

    (n.) cargo or goods sent by transport
  • shock

    (n.) sudden upsetting or disturbance
  • shrivel

    (v.) to wrinkle and contract; wither
  • shy

    (adj.) feeling nervous or timid
  • sickness

    (n.) state of being ill or unwell
  • sideways

    (adv.) in a lateral or side position
  • siege

    (n.) surrounding forces to capture
  • silica

    (n.) mineral compound of silicon and oxygen
  • silicate

    (n.) mineral containing silicon and oxygen
  • sinuous

    (adj.) having many curves or turns
  • skeptical

    (adj.) doubtful or questioning
  • skyscraper

    (n.) very tall multi-story building
  • slender

    (adj.) slim or gracefully thin
  • slide

    (v.) to move smoothly along a surface
  • slippery

    (adj.) difficult to hold or stand on
  • sloop

    (n.) small single-masted sailboat
  • slumber

    (n.) sleep or light sleep
  • softwood

    (n.) wood from coniferous trees
  • solder

    (v.) metal alloy used to join metals
  • solemn

    (adj.) serious or grave in manner
  • solicit

    (v.) to ask for or seek earnestly
  • solidarity

    (n.) unity or agreement among people
  • solitude

    (n.) state of being alone or isolated
  • sophisticated

    (adj.) highly developed or complex
  • sour

    (adj.) acidic taste or flavor
  • souvenir

    (n.) object kept as a reminder
  • spaceship

    (n.) vehicle designed for space travel
  • spacious

    (adj.) large and roomy
  • span

    (v.) distance between two points
  • spangle

    (n.) small sparkling decorations
  • spark

    (v.) small flash of light or flame
  • sparsely

    (adv.) in a scattered or thin manner
  • specific

    (adj.) clearly defined or identified
  • spinet

    (n.) small keyboard musical instrument
  • spinning

    (adj.) rapid rotation around an axis
  • spiral

    (adj.) curve that winds around center
  • sponge

    (n.) a porous material or aquatic animal
  • spontaneously

    (adv.) without premeditation; naturally
  • springtime

    (n.) season of spring; renewal
  • spur

    (v.) to encourage or stimulate
  • squarely

    (adv.) directly or honestly
  • stagger

    (v.) to walk unsteadily or hesitate
  • stain

    (n.) mark that spoils appearance
  • stalk

    (n.) the main stem of a plant
  • standardized

    (adj.) made to conform to a norm
  • stanza

    (n.) group of lines in a poem
  • staple

    (n.) main or essential element
  • starch

    (n.) carbohydrate used as thickener or binder
  • statue

    (n.) carved or cast sculpture of a person or thing
  • steady

    (adj.) firm, stable, or unchanging
  • steak

    (n.) cut of beef or other meat
  • steep

    (v.) to soak in liquid; or very high
  • stem

    (v.) main stalk of a plant or flower
  • stern

    (adj.) strict or severe in manner
  • stiffen

    (v.) become rigid or firm
  • stipulate

    (v.) specify explicitly as a condition
  • stitch

    (v.) sewing loop or thread for mending
  • stocky

    (adj.) short and sturdily built
  • strain

    (n.) apply force causing deformation or stress
  • strand

    (n.) a single length of fiber or thread
  • stride

    (n.) long, confident step
  • strip

    (v.) a long narrow piece or area
  • stubborn

    (adj.) unwilling to change willingly
  • stubbornness

    (n.) refusal to change attitude
  • studio

    (n.) room for creating art or recordings
  • stun

    (v.) cause to become temporarily unconscious
  • sturdy

    (adj.) reliably strong and durable
  • stylized

    (adj.) depicted in a distinctive manner
  • submarine

    (n.) underwater watercraft
  • submerge

    (v.) go underwater or under surface
  • submerged

    (adj.) placed underwater
  • subside

    (v.) become less intense or severe
  • subsidiary

    (adj.) dependent or secondary branch
  • subsidize

    (v.) support financially
  • subsistence

    (n.) living with minimum necessities
  • subspecies

    (adj.) subdivision of a species
  • subtle

    (adj.) done in a delicate manner
  • subtract

    (v.) deduct or take away
  • suburbanite

    (n.) resident of suburbs
  • subversive

    (adj.) aiming to overthrow authority
  • succumb

    (v.) yields to pressure or temptation
  • summit

    (n.) highest point or peak
  • sunglasses

    (n.) eyewear protecting eyes from sunlight
  • superficial

    (adj.) near surface or shallow
  • supplant

    (v.) replace or displace
  • supplement

    (n.) add to enhance or complete
  • supposedly

    (adv.) according to assumption or belief
  • surplus

    (adj.) excess beyond need
  • suspense

    (n.) feeling of excitement or tension
  • swallow

    (v.) consume food or liquid
  • swampy

    (adj.) miry or marshy ground
  • sway

    (v.) move slowly side to side
  • swiftness

    (n.) speed or quickness
  • symbiotic

    (adj.) mutually beneficial relationship
  • symbol

    (n.) representational sign or object
  • symbolize

    (v.) represent by a symbol
  • symptom

    (n.) sign of a disease
  • synonymous

    (adj.) having same or similar meaning
  • synthetic

    (n.) man-made or artificial
  • tactics

    (n.) strategies or methods
  • tactile

    (adj.) relating to touch
  • talent

    (n.) natural aptitude or skill
  • talented

    (adj.) having natural ability
  • tapeworm

    (n.) parasitic flatworm
  • tariff

    (n.) tax on imports or exports
  • tedious

    (adj.) too long or monotonous
  • temperance

    (n.) moderation or self-restraint
  • temperate

    (adj.) moderate in action or thought
  • tendency

    (n.) inclination toward something
  • tense

    (adj.) stretched tight or anxious
  • terminate

    (v.) bring to an end
  • terminology

    (n.) specialized vocabulary
  • termite

    (n.) society-destroying insect
  • terrace

    (n.) flat raised level area
  • theme

    (n.) main subject or idea
  • thereby

    (adv.) by that means or as a result
  • thorn

    (n.) sharp pointed plant projection
  • threadlike

    (adj.) very thin and fine
  • thunderstorm

    (n.) storm with thunder and lightning
  • tilt

    (n.) slant or incline
  • timber

    (n.) wood prepared for building
  • timid

    (adj.) lacking courage or confidence
  • tolerant

    (adj.) willing to accept differences
  • torpor

    (n.) state of physical or mental sluggishness
  • torque

    (n.) force causing rotation
  • torrent

    (n.) strong, fast-moving stream of water
  • totter

    (v.) move unsteadily or shakily
  • toxin

    (n.) poisons produced by organisms
  • track

    (n.) road or path for passage
  • transcend

    (v.) go beyond limits or boundaries
  • transcript

    (n.) written or printed version
  • transfer

    (n.) move from one place to another
  • tread

    (v.) carefully step or walk
  • trespass

    (v.) enter unlawfully
  • trespasser

    (n.) person who trespasses
  • trilogy

    (n.) set of three related works
  • triumph

    (n.) victory or great achievement
  • trivial

    (adj.) of little importance
  • trove

    (n.) valuable collection or store
  • tuition

    (n.) fee for instruction
  • tundra

    (n.) a treeless cold biome
  • turbulence

    (n.) unsteady or chaotic motion
  • turnpike

    (n.) toll road for vehicles
  • twig

    (n.) small branch or stick
  • twist

    (v.) rotate or bend out of shape
  • tycoon

    (n.) wealthy and powerful person
  • typify

    (v.) represent or symbolize
  • ultrasonic

    (adj.) above human hearing range
  • ultraviolet

    (adj.) light beyond violet spectrum
  • unanimous

    (adj.) sharing the same opinion
  • unbearable

    (adj.) impossible to endure
  • unbridled

    (adj.) unrestrained or uncontrolled
  • unbroken

    (adj.) intact or undamaged
  • uncover

    (v.) reveal or expose previously hidden
  • undergraduate

    (n.) student in early college years
  • underground

    (adj.) beneath earth's surface or hidden
  • undermine

    (v.) weaken gradually or secretly
  • underneath

    (adv.) beneath or below something
  • undertake

    (v.) commit to do or start something
  • undertaking

    (n.) project or task to accomplish
  • underwater

    (adj.) below the water's surface
  • undistorted

    (adj.) not altered or twisted
  • undo

    (v.) reverse or cancel an action
  • undoubtedly

    (adv.) certainly or without doubt
  • unfair

    (adj.) not just or equitable
  • unfortunately

    (adv.) sadly or regrettably
  • uniformity

    (n.) consistency or sameness
  • uninhabited

    (adj.) not occupied or populated
  • unique

    (adj.) one of a kind; special
  • unload

    (v.) remove cargo or load
  • unmatched

    (adj.) not equal or better than
  • unpack

    (v.) take out of packaging
  • unquestionably

    (adv.) certainly or definitely
  • unravel

    (v.) undo or disentangle
  • unrestrained

    (adj.) not held back; free
  • unrestricted

    (adj.) not limited or confined
  • unscrupulous

    (adj.) lacking morals or ethics
  • unscrupulously

    (adv.) immorally or unethically
  • unselfish

    (adj.) selfless; caring for others
  • upheaval

    (n.) sudden or violent change
  • uphold

    (v.) support or maintain
  • urbane

    (adj.) polished, sophisticated, city-like
  • urbanization

    (n.) growth of cities
  • utility

    (n.) usefulness or benefit
  • utilization

    (n.) the act of using something
  • utter

    (v.) complete or absolute
  • utterance

    (n.) spoken word or statement
  • vacant

    (adj.) empty, unoccupied
  • vaporize

    (v.) turn into vapor or gas
  • vastness

    (n.) immense size or extent
  • vegetarian

    (n.) person who eats plant foods
  • veneration

    (n.) deep respect or reverence
  • vent

    (n.) an opening for escape or release
  • venturesome

    (adj.) willing to take risks
  • venue

    (n.) location for events
  • version

    (n.) form or variant of something
  • vertical

    (adj.) upright; perpendicular
  • vestige

    (n.) trace or remnant of something
  • veteran

    (n.) experienced person or soldier
  • vibrate

    (v.) shake rapidly back and forth
  • victorious

    (adj.) having won a competition
  • victory

    (n.) success or achievement in battle
  • vie

    (v.) compete eagerly for something
  • vigilance

    (n.) watchfulness for danger
  • vigorous

    (adj.) strong, energetic, or forceful
  • vine

    (n.) climbing plant or creeper
  • violent

    (adj.) causing physical force or destruction
  • violin

    (n.) stringed musical instrument
  • virtuosity

    (n.) exceptional skill or talent
  • viscous

    (adj.) thick, sticky consistency
  • vista

    (n.) beautiful view or prospect
  • volatile

    (adj.) unstable; easily changes or evaporates
  • voluntary

    (adj.) done by choice; optional
  • vowel

    (n.) speech sound produced with open vocal tract
  • vulnerable

    (adj.) susceptible to harm or attack
  • walkout

    (n.) protest by leaving a place
  • walnut

    (n.) edible nut with hard shell
  • wary

    (adj.) cautious or suspicious
  • waterproof

    (adj.) impervious to water
  • weary

    (adj.) feeling tired or exhausted
  • weed

    (n.) unwanted plant or invasive species
  • weld

    (v.) join with intense heat or pressure
  • whim

    (n.) sudden wish or fanciful idea
  • wholesaler

    (n.) buys and sells large quantities
  • willow

    (n.) tree with flexible branches
  • withdraw

    (v.) remove or retreat from something
  • withdrawal

    (n.) act of taking back or leaving
  • wither

    (v.) shrivel or lose freshness
  • withstand

    (v.) resist or endure successfully
  • witness

    (n.) person who observes an event
  • workload

    (n.) amount of work to be done
  • wrestling

    (n.) sport of grappling and throwing
  • wring

    (v.) twist or squeeze forcefully
  • wristwatch

    (n.) timepiece worn on the wrist
  • yardstick

    (n.) measuring stick to measure length
  • yarn

    (n.) thread used in knitting or weaving
  • zigzag

    (adj.) sharp turns in a zigzag pattern