Online English Vocabulary Flashcards for ACT 3 (American College Testing) Words

addendum (noun) /əˈdɛndəm/
Definition: A section or supplement added to a document, usually at the end, that provides additional information or clarification.
Example Sentence: "The addendum to the contract included additional terms and conditions."
Synonyms: addition; adjunct; affix; appendage; appendix; attachment
Opposite Meaning: deletion

adjunct (adjective) /ˈadʒʌŋ(k)t/
Definition: Added or attached to another thing to supplement it or make it more complete.
Example Sentence: "The university offers a range of adjunct courses in various subjects."
Synonyms: accessory; accompaniment; addendum; addition; additional; annex
Opposite Meaning: primary

agreeable (adjective) /əˈgri ə bəl/
Definition: Pleasant, enjoyable, or easily accepted.
Example Sentence: "Sarah had an agreeable personality, always smiling and ready to lend a helping hand."
Synonyms: affable; amiable; charming; congenial; delightful; enjoyable
Opposite Meaning: disagreeable

anterior (adjective) /anˈtɪərɪə/
Definition: Positioned or located towards the front of something or someone.
Example Sentence: "The anterior part of the brain controls important cognitive functions."
Synonyms: first; fore; former; forward; frontal; frontward
Opposite Meaning: posterior

aroma (noun) /əˈroʊ mə/
Definition: The distinctive and pleasant scent or smell that is typically associated with certain substances, such as food, beverages, plants, or perfumes.
Example Sentence: "The soothing aroma of chamomile tea helped me relax and unwind after a long day."
Synonyms: bouquet; essence; fragrance; odor; perfume; redolence
Opposite Meaning: odorlessness

artefact (noun) /ˈɑːtɪfakt/
Definition: An object that has been created or modified by humans and has some cultural, historical, or archaeological significance.
Example Sentence: "The archaeologist carefully examined the artefact to determine its age."
Synonyms: artifact; evidence; memento; memorabilia; relic; remains
Opposite Meaning: innovation

assemble (verb) /əsembə/
Definition: To gather or bring together various parts, components, or people in order to create a unified whole or accomplish a specific purpose.
Example Sentence: "We need to assemble a team of experts to tackle this complex problem."
Synonyms: accumulate; amass; collect; compile; congregate; convene
Opposite Meaning: disperse

awe (noun) /ɔ/
Definition: A profound feeling of reverence, wonder, or admiration inspired by something remarkable, extraordinary, or of great magnitude.
Example Sentence: "The vastness of the night sky filled him with a sense of awe."
Synonyms: admiration; amazement; astonishment; fascination; grandeur; marvel
Opposite Meaning: disdain

behavior (noun) /bɪˈheɪv yər/
Definition: The way individuals or organisms act, conduct themselves, or respond to stimuli in a given situation.
Example Sentence: "The psychologist studied the behavior of social groups to uncover patterns of interaction."
Synonyms: actions; attitude; bearing; conduct; demeanor; deportment
Opposite Meaning: inaction

blunder (noun) /ˈblʌndər/
Definition: A serious or embarrassing mistake, often caused by a lack of knowledge, judgment, or attention.
Example Sentence: "The blunder in the airline's scheduling caused many passengers to miss their flights."
Synonyms: bungle; error; fault; fumble; gaffe; gaucherie
Opposite Meaning: precision

compensate (verb) /ˈkɑmpənˌseɪt/
Definition: To make up for or to provide a substitute for something that is missing, lacking or insufficient.
Example Sentence: "The company will compensate its employees for their overtime work."
Synonyms: balance; indemnify; recompense; redress; refund; reimburse
Opposite Meaning: disregard

compulsive (adjective) /kəmˈpʌlsɪv/
Definition: Relating to an irresistible urge to perform a certain behavior or activity, often despite the negative consequences it may have on the person's life.
Example Sentence: "The compulsive gambler couldn't resist the urge to keep playing."
Synonyms: addictive; chronic; incorrigible; inveterate; irresistible; obsessive
Opposite Meaning: controlled

condescending (adjective) /ˌkɒndɪˈsɛndɪŋ/
Definition: Having or showing a patronizing or superior tone, as if looking down on others.
Example Sentence: "He spoke to her in a condescending tone, as if she were a child."
Synonyms: arrogant; contemptuous; disdainful; haughty; impudent; lofty
Opposite Meaning: respectful

contrast (noun) /ˈkɒntrɑːst/
Definition: The difference or dissimilarity between two or more things, ideas, or concepts.
Example Sentence: "The contrast between the bright blue sky and the green grass was breathtaking."
Synonyms: antithesis; contradistinction; deviation; difference; differentiation; discrepancy
Opposite Meaning: similarity

converge (verb) /kənˈvəːdʒ/
Definition: To come together or meet at a common point, either physically or metaphorically.
Example Sentence: "The two rivers converge at the base of the mountain."
Synonyms: assemble; cluster; coincide; collect; combine; congregate
Opposite Meaning: diverge

cremate (verb) /krɪmeɪt IPA Pronunciation Guide/
Definition: To reduce a deceased person's body to ashes through the application of intense heat, typically in a specifically designed furnace known as a crematorium.
Example Sentence: "The family decided to cremate their loved one according to their wishes."
Synonyms: blaze; burn; carbonize; char; consume; fire
Opposite Meaning: bury

crude (adjective) /krud/
Definition: In a raw, unrefined, or unfinished state.
Example Sentence: "His crude attempts at painting resulted in messy, unrecognizable shapes."
Synonyms: basic; coarse; primitive; raw; rough; rudimentary
Opposite Meaning: refined

devalue (verb) /diˈvæl yu/
Definition: To reduce or diminish the worth, importance, or significance of something, typically in terms of monetary value or esteem.
Example Sentence: "The flood damage caused the property's value to devalue significantly."
Synonyms: belittle; cheapen; deflate; depreciate; diminish; discredit
Opposite Meaning: appreciate

discreet (adjective) /dɪˈskriːt/
Definition: Careful and circumspect in one's behavior, particularly when dealing with confidential or sensitive information.
Example Sentence: "The spy was discreet in his movements to avoid detection."
Synonyms: cautious; considerate; diplomatic; politic; sagacious; sensible
Opposite Meaning: indiscreet

disrepute (noun) /ˌdɪsrɪˈpjuːt/
Definition: The state of being held in low regard or having a bad reputation.
Example Sentence: "His public tirades are bringing the club into disrepute."
Synonyms: degradation; discredit; disesteem; disfavor; disgrace; dishonor
Opposite Meaning: honor

divert (verb) /dɪˈvɜrt/
Definition: To redirect or change the course or direction of something, whether it be physical objects, resources, attention, or activities.
Example Sentence: "She tried to divert the conversation to a more lighthearted topic."
Synonyms: amuse; avert; deviate; distract; entertain; rechannel
Opposite Meaning: maintain

dumbfound (verb) /ˈdʌmfaʊnd/
Definition: To leave someone speechless or unable to react because they are so surprised or shocked.
Example Sentence: "The unexpected twist in the story will dumbfound readers."
Synonyms: astonish; astound; bewilder; confuse; flabbergast; flummox
Opposite Meaning: clarify

emasculate (verb) /əˈmæskjuˌleɪt/
Definition: To weaken, deprive, or castrate someone or something of its power, effectiveness, or masculinity.
Example Sentence: "The constant criticism and rejection started to emasculate his confidence."
Synonyms: castrate; debilitate; demasculinize; desexualize; devirilize; devitalize
Opposite Meaning: strengthen

emulate (verb) /ˈɛmjʊleɪt/
Definition: To imitate or copy the actions, behavior, or characteristics of another person, group, or thing.
Example Sentence: "The student tried to emulate the study habits of her successful peer."
Synonyms: copy; echo; follow; imitate; match; mimic
Opposite Meaning: differ

encouragement (noun) /ɛnˈkɜr ɪdʒ mənt/
Definition: The act of providing support, motivation, or inspiration to someone in order to boost their confidence, morale, or determination.
Example Sentence: "She showered him with encouragement, reminding him of his strength and resilience."
Synonyms: applause; approval; backing; boost; empowerment; inspiration
Opposite Meaning: discouragement

enrichment (noun) /ɛnˈrɪtʃ mənt/
Definition: The act or process of making something richer, more meaningful, or more valuable.
Example Sentence: "The school offers various enrichment programs to enhance students' learning beyond the classroom."
Synonyms: advancement; augmentation; betterment; cultivation; development; elevation
Opposite Meaning: depletion

ensemble (noun) /ɑnˈsɑm bəl/
Definition: A group or collection of things that are considered as a whole.
Example Sentence: "The brass ensemble played a triumphant fanfare that echoed through the concert hall."
Synonyms: assembly; band; cast; collection; company; crew
Opposite Meaning: individual

espouse (verb) /ɛˈspaʊz/
Definition: To adopt, support, or advocate for a particular belief, cause, ideology, opinion, or practice.
Example Sentence: "It's important to espouse values of honesty and integrity in the workplace."
Synonyms: adopt; advance; advocate; back; champion; defend
Opposite Meaning: oppose

eternity (noun) /ɪˈtɜr nɪ ti/
Definition: A concept or state that represents endless or infinite duration, transcending the constraints of time and space.
Example Sentence: "The beauty of the starry night sky made them feel connected to the vastness of eternity."
Synonyms: ceaselessness; duration; endlessness; everlastingness; forever; immortality
Opposite Meaning: moment

exponential (adjective) /ˌɛkspə(ʊ)ˈnɛnʃl/
Definition: Describing a rapid and significant increase or growth that occurs at an accelerating rate over time.
Example Sentence: "The world's population has been growing at an exponential rate for centuries."
Synonyms: ascending; expanding; explosive; growing; mounting; rampant
Opposite Meaning: linear

ferocity (noun) /fəˈrɒs ɪ ti/
Definition: The quality or state of being fierce, intense, or aggressive.
Example Sentence: "The storm unleashed its ferocity, tearing through the town with destructive force."
Synonyms: aggression; brutality; fierceness; force; fury; intensity
Opposite Meaning: gentleness

horizontal (adjective) /ˌhɔr əˈzɒn tl/
Definition: Parallel to the horizon or the horizontal plane.
Example Sentence: "The architects designed a modern building with clean lines and sleek horizontal windows."
Synonyms: aligned; equidistant; even; flat; flush; level
Opposite Meaning: vertical

idealist (noun) / aɪˈdi ə lɪst/
Definition: A person who holds a strong belief in the power of ideals and strives to embody them in their thoughts, actions, and aspirations.
Example Sentence: "The idealist's speeches were filled with hope and encouragement."
Synonyms: believer; crusader; dreamer; enthusiast; idealizer; ideologue
Opposite Meaning: realist

ignorant (adjective) /ɪgnərənt/
Definition: Lacking knowledge, understanding, or awareness about a particular subject or topic.
Example Sentence: "Her ignorant refusal to acknowledge scientific evidence led to misguided health decisions."
Synonyms: clueless; illiterate; inexperienced; naive; oblivious; unaware
Opposite Meaning: knowledgeable

imitate (verb) /ˈɪm ɪˌteɪt/
Definition: To copy, mimick, or reproduce the actions, behavior, or characteristics of someone or something else.
Example Sentence: "The child tried to imitate the sound of a bird chirping."
Synonyms: ape; copy; echo; emulate; follow; impersonate
Opposite Meaning: originate

implication (noun) /ˌɪmplɪˈkeɪʃn/
Definition: A meaning or consequence that is suggested or implied, rather than stated outright.
Example Sentence: "His remarks carried an implication of deep skepticism."
Synonyms: inference; insinuation; intimation; meaning; presumption; ramification
Opposite Meaning: clarification

incentive (noun) /ɪnˈsɛn tɪv/
Definition: A motivating factor or reward that encourages someone to act in a certain way or achieve a particular goal.
Example Sentence: "The company offered a cash incentive to employees who exceeded their sales targets."
Synonyms: attraction; boost; encouragement; enticement; impetus; incitement
Opposite Meaning: deterrent

inept (adjective) /ɪˈnɛpt/
Definition: Having or showing no skill or aptitude for a particular task or assignment.
Example Sentence: "The inept management was the reason for the company's downfall."
Synonyms: amateurish; awkward; blundering; botched; bumbling; bungling
Opposite Meaning: competent

interface (noun) /ˈɪntəfeɪs/
Definition: A point of interaction between two or more entities, typically between a human and a machine, or between two computer systems.
Example Sentence: "The new software has a user-friendly interface."
Synonyms: attachment; bond; connection; crossing; frontier; intersection
Opposite Meaning: disconnection

justify (verb) /ˈdʒʌstɪfʌɪ/
Definition: To provide an explanation or reasoning that supports or defends a decision, action, or belief.
Example Sentence: "She had to justify her absence from work with a doctor's note."
Synonyms: condone; explain; legitimize; rationalize; substantiate; uphold
Opposite Meaning: condemn

lopsided (adjective) /ˈlɒpˈsaɪ dɪd/
Definition: Uneven, unbalanced, or asymmetrical in shape, structure, or distribution.
Example Sentence: "The lopsided painting on the wall tilted to one side."
Synonyms: askew; asymmetrical; crooked; disproportionate; imbalanced; skewed
Opposite Meaning: balanced

malnutrition (noun) /mælnjuːtrɪʃən/
Definition: A condition characterized by inadequate or imbalanced intake of essential nutrients necessary for the proper functioning and growth of the human body.
Example Sentence: "Malnutrition can lead to stunted growth and developmental delays."
Synonyms: cachexia; deficiency; deprivation; emaciation; famine; hunger
Opposite Meaning: well-nourished

messenger (noun) /ˈmɛs ən dʒər/
Definition: An individual or entity responsible for delivering messages, information, or communications from one person or party to another.
Example Sentence: "The messenger arrived at the office with an urgent package."
Synonyms: agent; bearer; carrier; courier; dispatcher; emissary
Opposite Meaning: receiver

moderate (adjective) /ˈmɒd(ə)rət/
Definition: Average in size, amount, quality, or degree, especially when compared to other things of the same kind.
Example Sentence: "The pain was moderate and could be managed with over-the-counter medication."
Synonyms: calm; medium; mild; modest; neutral; reasonable
Opposite Meaning: extreme

modest (adjective) /ˈmɒd ɪst/
Definition: Demonstrating simplicity, humility, or moderation in one's actions, appearance, or achievements.
Example Sentence: "Despite his remarkable talent, he remained modest and never boasted about his achievements."
Synonyms: conservative; discreet; humble; moderate; reserved; restrained
Opposite Meaning: arrogant

nonexistence (noun) /ˌnɒn ɪgˈzɪs təns/
Definition: The state or condition of not existing or being absent from reality.
Example Sentence: "The philosopher contemplated the mysteries of nonexistence and the nature of reality."
Synonyms: absence; emptiness; inexistence; negation; nihility; nonbeing
Opposite Meaning: existence

nucleus (noun) /ˈnu kli əs/
Definition: A central and vital component of an atom, residing at its core.
Example Sentence: "The nucleus is surrounded by a cloud of electrons."
Synonyms: base; center; centroid; core; crux; epicenter
Opposite Meaning: periphery

oust (verb) /aʊst/
Definition: To forcefully remove or expel someone from a position of authority, power, or possession, often as a result of a legal or political action.
Example Sentence: "The rebels tried to oust the dictator from power."
Synonyms: depose; dethrone; discharge; dismiss; evict; exclude
Opposite Meaning: appoint

peckish (adjective) /ˈpɛk ɪʃ/
Definition: Mildly hungry or having a slight appetite.
Example Sentence: "After skipping breakfast, I was feeling peckish by mid-morning."
Synonyms: appetitive; craving; desirous; empty; famished; hankering
Opposite Meaning: sated

pending (preposition) /ˈpɛn dɪŋ/
Definition: Awaiting a decision, resolution, or completion.
Example Sentence: "The project is on hold pending approval from the management."
Synonyms: anticipatory; awaiting; before; conditional; forthcoming; imminent
Opposite Meaning: resolved

perceptive (adjective) /pərˈsɛp tɪv/
Definition: Possessing a keen ability to understand, interpret, and discern things accurately, often through astute observation and intuition.
Example Sentence: "The perceptive child sensed her mother's sadness and offered a comforting hug."
Synonyms: acute; astute; aware; discerning; insightful; intuitive
Opposite Meaning: oblivious

persuadable (adjective) /pəˈsweɪdəbᵊl/
Definition: Open to being influenced, convinced, or swayed by persuasive arguments, reasoning, or evidence.
Example Sentence: "The salesperson recognized the customer's persuadable nature and tailored the pitch accordingly."
Synonyms: amenable; compliant; convincible; flexible; impressionable; malleable
Opposite Meaning: stubborn

plentitude (noun) /ˈplɛntɪˌtjud/
Definition: A state or condition of abundance, fullness, or plentifulness.
Example Sentence: "The farmers' market was bursting with a plentitude of fresh fruits and vegetables."
Synonyms: abundance; amplitude; bounty; copiousness; exuberance; overflow
Opposite Meaning: scarcity

potential (noun) /pəˈtɛnʃl/
Definition: The latent qualities, abilities, or aptitudes that an individual or entity possesses, which, if developed or harnessed, may lead to future success.
Example Sentence: "The company is looking for employees with leadership potential."
Synonyms: capability; capacity; competence; likelihood; possibilities; promise
Opposite Meaning: incapability

poverty (noun) /ˈpɒvəti/
Definition: The state of being without adequate resources or means to meet basic needs such as food, shelter, and clothing.
Example Sentence: "The documentary shed light on the harsh realities of poverty in urban areas."
Synonyms: beggary; destitution; hardship; indigence; pauperism; penury
Opposite Meaning: wealth

predominant (adjective) /prɪˈdɒmɪnənt/
Definition: Of the most prevalent, important or influential among a group or collection of things.
Example Sentence: "The predominant theme in the book was love and relationships."
Synonyms: cardinal; chief; dominant; foremost; overriding; paramount
Opposite Meaning: minor

preserve (verb) /prɪˈzɜrv/
Definition: To protect, maintain, or conserve something in its original or desired state.
Example Sentence: "The organization works tirelessly to preserve historical landmarks and buildings."
Synonyms: conserve; guard; maintain; perpetuate; protect; retain
Opposite Meaning: destroy

prior (adjective) /ˈpraɪ ər/
Definition: Existing or occurring before a specific time, event, or point in a sequence.
Example Sentence: "Christopher had a prior engagement, so he couldn't attend the party."
Synonyms: antecedent; anterior; before; earlier; foregoing; former
Opposite Meaning: subsequent

quarrelsome (adjective) /ˈkwɔr əl səm/
Definition: Prone to engaging in arguments, disputes, or conflicts.
Example Sentence: "His quarrelsome attitude alienated him from his friends and colleagues."
Synonyms: antagonistic; argumentative; bellicose; belligerent; combative; confrontational
Opposite Meaning: agreeable

regardless (adverb) /rɪˈgɑrd lɪs/
Definition: Lacking consideration or attention to a particular factor or circumstance.
Example Sentence: "He pursued his dreams regardless of the naysayers."
Synonyms: anyhow; anyway; indiscriminately; irrespective; nevertheless; nonetheless
Opposite Meaning: mindful

replicate (verb) /ˈrɛp lɪˌkeɪt/
Definition: To reproduce or recreate something in an identical or very similar manner.
Example Sentence: "I have been attempting to replicate my grandmother's recipe for weeks now."
Synonyms: copy; duplicate; echo; emulate; imitate; match
Opposite Meaning: differ

safeguard (noun) /ˈseɪfˌgɑrd/
Definition: A measure or action taken to protect or ensure the safety, security, or well-being of someone or something.
Example Sentence: "The company implemented strict security measures as a safeguard against data breaches."
Synonyms: assurance; barrier; defense; insurance; measure; precaution
Opposite Meaning: threat

sensational (adjective) /s(ɛ)nˈseɪʃən(ə)l/
Definition: Extremely impressive, exciting, or noteworthy.
Example Sentence: "The scientist's discovery was a sensational breakthrough in the field."
Synonyms: amazing; astounding; breathtaking; exceptional; fabulous; marvelous
Opposite Meaning: mundane

serendipity (noun) /ˌsɛrənˈdɪpɪti/
Definition: The phenomenon of finding or discovering valuable or fortunate things by chance.
Example Sentence: "The serendipity of discovering a new use for the medicine was a major breakthrough."
Synonyms: accident; blessing; coincidence; fortuitousness; godsend; happenstance
Opposite Meaning: misfortune

slapstick (noun) /ˈslapstɪk/
Definition: A form of physical comedy that emphasizes exaggerated, often violent, physical action.
Example Sentence: "The comedic duo was known for their slapstick humor and physical comedy."
Synonyms: absurdity; buffoonery; burlesque; comedy; farce; horseplay
Opposite Meaning: drama

spike (noun) /spaɪk/
Definition: A slender, pointed object or projection that protrudes from a surface or material.
Example Sentence: "The data showed a sudden spike in website traffic after the article went viral."
Synonyms: acicula; apex; barb; jag; peak; pike
Opposite Meaning: blunt

stakeholder (noun) /ˈsteɪkˌhoʊl dər/
Definition: An individual, group, or entity that has a direct or indirect interest in a particular project, organization, or system.
Example Sentence: "The stakeholders included community members, government officials, and industry leaders."
Synonyms: ally; associate; collaborator; contributor; investor; participant
Opposite Meaning: outsider

stimulant (noun) /ˈstɪm yə lənt/
Definition: A substance or agent that excites or activates the central nervous system, producing an increase in alertness, attention, and physical activity.
Example Sentence: "Coffee is a commonly consumed stimulant that helps to wake people up in the morning."
Synonyms: boost; catalyst; energizer; exciter; goad; invigorator
Opposite Meaning: depressant

stockpile (noun) /ˈstɒkˌpaɪl/
Definition: A large accumulation or reserve of goods, materials, or resources that are kept for future use or as a contingency.
Example Sentence: "The survivalist had a stockpile of canned food and water in their basement."
Synonyms: accumulation; backlog; cache; collection; heap; hoard
Opposite Meaning: deplete

substantial (adjective) /səbˈstæn ʃəl/
Definition: Considerable in size, amount, or importance.
Example Sentence: "The company experienced substantial growth in its sales revenue this quarter."
Synonyms: abundant; ample; big; considerable; hefty; large
Opposite Meaning: trivial

terrace (noun) /ˈtɛr əs/
Definition: A raised, flat platform or open area that is typically attached to a building or located on the ground level of a structure.
Example Sentence: "The hotel's rooftop terrace offered breathtaking views of the city skyline."
Synonyms: balcony; courtyard; deck; lanai; patio; piazza
Opposite Meaning: valley

tipsy (adjective) /ˈtɪpsi/
Definition: Slightly intoxicated or inebriated due to the consumption of alcoholic beverages.
Example Sentence: "She felt a bit tipsy after drinking a glass of wine at the party."
Synonyms: buzzed; dizzy; drunk; impaired; intoxicated; lightheaded
Opposite Meaning: sober

token (adjective) /ˈtəʊk(ə)n/
Definition: Done or given as a symbolic gesture, rather than as a serious or genuine effort.
Example Sentence: "The government's new policy was seen as a token gesture to address the issue."
Synonyms: cosmetic; cursory; demonstration; expression; insincere; minimal
Opposite Meaning: substantial

transmit (verb) /trænsˈmɪt/
Definition: To send or convey something from one place, person, or device to another.
Example Sentence: "The satellite will transmit the live feed to viewers around the world."
Synonyms: broadcast; communicate; convey; deliver; dispatch; disseminate
Opposite Meaning: retain

worthy (adjective) /ˈwəːði/
Definition: Possesses qualities, attributes, or merits that deserve recognition, respect, or consideration.
Example Sentence: "The soldier's bravery made him worthy of a medal of honor."
Synonyms: admirable; commendable; creditable; deserving; dignified; estimable
Opposite Meaning: unworthy