Online English Vocabulary Flashcards for ACT 11 (American College Testing) Words

adjoining (adjective) /əˈdʒɔɪ nɪŋ/
Definition: Physically connected, situated next to, or sharing a common boundary with another object, place, or area.
Example Sentence: "The office had an adjoining conference room for meetings and presentations."
Synonyms: abutting; adjacent; bordering; conjoined; connected; contiguous
Opposite Meaning: distant

ad-lib (verb) /ˈædˈlɪb/
Definition: To spontaneously improvise or perform dialogue, music, or actions without prior preparation or scripting.
Example Sentence: "The actor forgot his lines on stage but managed to ad-lib his way through the scene."
Synonyms: ad-hoc; create; extempore; extemporize; freestyle; impromptu
Opposite Meaning: script

ailment (noun) /ˈeɪl mənt/
Definition: A physical or mental condition or illness that causes discomfort, pain, or distress to an individual.
Example Sentence: "He complained of various ailments, including fatigue, headaches, and joint pain."
Synonyms: affliction; complaint; condition; disease; disorder; distress
Opposite Meaning: healthiness

allotment (noun) /əˈlɒt mənt/
Definition: A portion or share of something that is assigned or distributed to someone.
Example Sentence: "The company made a generous allotment of shares to its employees."
Synonyms: allocation; apportionment; assignment; dispensation; distribution; division
Opposite Meaning: deprivation

analogy (noun) /əˈnæləʤi/
Definition: A cognitive tool used to understand or explain something by comparing it to something else that is similar in certain aspects.
Example Sentence: "The teacher used an analogy to explain the concept of electricity using a flowing river as a comparison."
Synonyms: comparison; connection; correlation; correspondence; equivalence; likeness
Opposite Meaning: dissimilarity

annals (noun) /ˈænlz/
Definition: A chronological record of events, especially those of historical importance.
Example Sentence: "The annals of ancient Rome provide an account of the rise and fall of the Roman Empire."
Synonyms: accounts; archives; chronicles; diaries; history; logs
Opposite Meaning: future

anonymous (adjective) /əˈnɒnɪməs/
Definition: Without a known or disclosed identity, often deliberately so.
Example Sentence: "The charity received an anonymous donation that greatly helped their cause."
Synonyms: covert; faceless; incognito; nameless; obscure; secret
Opposite Meaning: identified

astonishment (noun) /əˈstɒn ɪʃ mənt/
Definition: A feeling or state of being greatly surprised, amazed, or bewildered.
Example Sentence: "His unexpected proposal left her in a state of utter astonishment."
Synonyms: amazement; awe; bewilderment; disbelief; incredulity; marvel
Opposite Meaning: expectation

authority (noun) /əˈθɔr ɪ ti/
Definition: The power or right to give commands, make decisions, and enforce obedience.
Example Sentence: "The parents' authority is crucial in shaping the values and behavior of their children."
Synonyms: command; control; dominion; governance; influence; jurisdiction
Opposite Meaning: subordination

binary (adjective) /ˈbʌɪn(ə)ri/
Definition: Characterized by the use of two distinct and mutually exclusive options or elements.
Example Sentence: "The binary system uses only two digits, 0 and 1."
Synonyms: binate; bipartite; dichotomous; double; dual; duo
Opposite Meaning: singular

boycott (verb) /ˈbɔɪkɒt/
Definition: To refuse to buy, use, or participate in something as a form of protest or to express disapproval.
Example Sentence: "Many people have decided to boycott the brand after the scandal."
Synonyms: blackball; blacklist; embargo; ostracize; outlaw; prohibit
Opposite Meaning: support

cavity (noun) /ˈkæv ɪ ti/
Definition: A hollow or empty space within an object or organism.
Example Sentence: "The cavity in the wall needed to be filled and patched before painting."
Synonyms: chamber; crater; dent; hole; hollow; indentation
Opposite Meaning: solid

colleague (noun) /ˈkɒl ig/
Definition: A person with whom one shares a workplace or professional environment, typically engaged in similar or related tasks or projects.
Example Sentence: "My colleague and I attended a conference to expand our professional network."
Synonyms: ally; associate; collaborator; companion; comrade; confidant
Opposite Meaning: stranger

commiserate (verb) /kəˈmɪzəreɪt/
Definition: To express or feel sympathy and sorrow for someone who is in a difficult or unfortunate situation.
Example Sentence: "The team gathered to commiserate after their tough loss."
Synonyms: alleviate; comfort; condole; console; empathize; pity
Opposite Meaning: disregard

communicative (adjective) /kəˈmyu nɪˌkeɪ tɪv/
Definition: Inclined or skilled in the act of communication.
Example Sentence: "The teacher encourages a communicative classroom environment where students actively participate."
Synonyms: articulate; chatty; eloquent; expressive; forthcoming; gregarious
Opposite Meaning: reserved

compact (adjective) /kəmˈpækt/
Definition: Small in size or taking up minimal space.
Example Sentence: "The compact design of the new smartphone allowed for easy one-handed use."
Synonyms: bijou; compressed; concise; condensed; efficient; miniature
Opposite Meaning: bulky

conceive (verb) /kənˈsiːv/
Definition: To develop, formulate, and bring forth innovative notions, plans, or thoughts from the mind.
Example Sentence: "The artist's ability to conceive new and original ideas was impressive."
Synonyms: contemplate; dream; envisage; envision; fantasize; imagine
Opposite Meaning: ignore

concern (verb) /kənˈsɜr/
Definition: To cause worry, interest, or anxiety about something.
Example Sentence: "The welfare of the endangered species is a global concern."
Synonyms: affect; bother; care; disturb; engage; fret
Opposite Meaning: indifference

conservative (adjective) /kənˈsɜr və tɪv/
Definition: Valuing traditional principles, practices, or institutions, and resisting or being cautious about significant changes or innovations.
Example Sentence: "The conservative politician advocated for lower taxes and limited government intervention."
Synonyms: cautious; conventional; established; inflexible; moderate; orthodox
Opposite Meaning: progressive

conspiracy (noun) /kənˈspɪrəsi/
Definition: A secret plan or agreement between two or more individuals or groups to commit an illegal or harmful act.
Example Sentence: "The conspiracy to smuggle drugs across the border was uncovered by law enforcement."
Synonyms: collusion; design; intrigue; machination; manipulation; plot
Opposite Meaning: honesty

contract (noun) /ˈkɒn trækt/
Definition: A legally binding agreement between two or more parties that establishes rights, obligations, and responsibilities.
Example Sentence: "She signed a contract with the publishing company for her upcoming book."
Synonyms: accord; agreement; arrangement; bond; compact; covenant
Opposite Meaning: disagreement

covert (adjective) /ˈkʌvət/
Definition: Concealed or hidden from view, often implying an element of secrecy or confidentiality.
Example Sentence: "Behind the scenes, there were covert discussions about the merger."
Synonyms: clandestine; concealed; furtive; hidden; incognito; masked
Opposite Meaning: overt

customary (adjective) /ˈkʌstəm(ə)ri/
Definition: In accordance with prevailing social conventions or cultural practices.
Example Sentence: "It is customary to remove your shoes before entering the temple."
Synonyms: accepted; accustomed; acknowledged; common; conventional; established
Opposite Meaning: unusual

dependency (noun) /dɪˈpɛn dən si/
Definition: A state or condition of being reliant or dependent on something or someone else.
Example Sentence: "His financial dependency on his job made him reluctant to pursue his true passions."
Synonyms: addiction; attachment; condition; constraint; hinge; need
Opposite Meaning: independence

designate (verb) /ˈdɛzɪɡneɪt/
Definition: To assign or appoint someone or something for a specific purpose or role.
Example Sentence: "The committee will designate a spokesperson for the group."
Synonyms: arrange; choose; classify; determine; establish; nominate
Opposite Meaning: dismiss

dislocate (verb) /ˈdɪsləkeɪt/
Definition: To move something, typically a body part, from its proper place or position.
Example Sentence: "The wrestler managed to dislocate his opponent's shoulder in the match."
Synonyms: disconnect; disjoint; displace; disrupt; disunite; misplace
Opposite Meaning: align

elated (adjective) /ɪˈleɪ tɪd/
Definition: Extreme happiness, joy, or exhilaration.
Example Sentence: "The team was elated after winning the championship for the first time in years."
Synonyms: delighted; ecstatic; enchanted; euphoric; exhilarated; exultant
Opposite Meaning: depressed

encompassing (adjective) /ɛnˈkʌm pə sɪŋ/
Definition: Comprehensive, wide-ranging, or inclusive in nature.
Example Sentence: "The all-encompassing view from the mountaintop took our breath away."
Synonyms: blanket; complete; comprehensive; extensive; global; inclusive
Opposite Meaning: limited

envision (verb) /ɛnˈvɪʒ ən/
Definition: To imagine, visualize, or picture something in one's mind.
Example Sentence: "We envision a society where healthcare is affordable for all."
Synonyms: conceive; conceptualize; contemplate; dream; fantasize; foresee
Opposite Meaning: disregard

expanse (noun) /ɪkˈspæns/
Definition: A vast and wide area that extends far and wide, often without any clear boundaries or limitations.
Example Sentence: "The expanse of the ocean stretched out before us, shimmering in the sunlight."
Synonyms: breadth; extent; landscape; panorama; range; reach
Opposite Meaning: confinement

extinguish (verb) /ɪkˈstɪŋɡwɪʃ/
Definition: To put out or quench something that is burning, such as a fire, a flame, or a spark.
Example Sentence: "The rain helped to extinguish the flames on the forest floor."
Synonyms: choke; douse; eliminate; end; eradicate; exterminate
Opposite Meaning: ignite

faction (noun) /ˈfakʃ(ə)n/
Definition: A group of people within a larger organization or society that have a common interest or goal and often act in opposition to the larger group.
Example Sentence: "The faction split from the main group, forming a new political party."
Synonyms: clique; coalition; contingent; division; lobby; movement
Opposite Meaning: majority

flawed (adjective) /flɔd/
Definition: Contains imperfections or shortcomings, undermining its overall quality, effectiveness, or integrity.
Example Sentence: "The flawed diamond had visible imperfections and irregularities, diminishing its value."
Synonyms: blemished; damaged; defective; deficient; erroneous; faulty
Opposite Meaning: flawless

glitch (noun) /glɪtʃ/
Definition: An unexpected and temporary malfunction or fault in a system, often resulting in a disruption or error in its normal functioning.
Example Sentence: "I had to restart my smartphone because it encountered a software glitch."
Synonyms: blip; bug; defect; error; fault; flaw
Opposite Meaning: perfection

hoist (verb) /hɔɪst/
Definition: To lift or raise something, typically using a mechanical device or physical effort.
Example Sentence: "We'll need to hoist the sail if we want to catch the wind."
Synonyms: boost; elevate; heave; lift; raise; upend
Opposite Meaning: lower

hydraulic (adjective) /hʌɪˈdrɒlɪk/
Definition: Powered by the movement of liquids, such as water or oil, under pressure.
Example Sentence: "The hydraulic cylinders were used to open and close the dam gates."
Synonyms: aquapneumatic; aqueous; fluidic; hydrokinetic; hydropneumatics; hydrostatic
Opposite Meaning: electric

illiterate (adjective) /ɪˈlɪt(ə)rət/
Definition: Lacking the ability to read and write effectively or possessing minimal or no literacy skills.
Example Sentence: "In some remote areas, people remain illiterate due to a lack of access to education."
Synonyms: analphabetic; benighted; ignorant; nonliterate; uneducated; uninformed
Opposite Meaning: literate

impermanent (adjective) /ɪmˈpɜr mə nənt/
Definition: Temporary, transitory, or not lasting indefinitely.
Example Sentence: "The beauty of a sunset is fleeting and impermanent, reminding us to cherish the moment."
Synonyms: changing; ephemeral; evanescent; fleeting; fugitive; momentary
Opposite Meaning: permanent

inconceivable (adjective) /ˌɪnkənˈsiːvəbl/
Definition: Difficult or impossible to imagine, believe, or understand.
Example Sentence: "The notion that we are alone in the universe is inconceivable to some."
Synonyms: boggling; implausible; impossible; incomprehensible; incredible; incredulous
Opposite Meaning: plausible

inconsistent (adjective) /ˌɪn kənˈsɪs tənt/
Definition: Lacking stability, coherence, or predictability.
Example Sentence: "Her answers during the interview were inconsistent and raised doubts about her qualifications."
Synonyms: capricious; changeable; contradictory; erratic; fickle; fluctuating
Opposite Meaning: consistent

insecure (adjective) /ˌɪn sɪˈkyʊər/
Definition: Lacking confidence, stability, or assurance.
Example Sentence: "She often felt insecure about her appearance, constantly comparing herself to others."
Synonyms: anxious; apprehensive; doubtful; fragile; hesitant; nervous
Opposite Meaning: confident

institution (noun) /ˌɪn stɪˈtu ʃən/
Definition: A structured and organized establishment or organization that has been established to serve a specific purpose within society.
Example Sentence: "The educational institution offers a wide range of courses to cater to students' diverse interests and career goals."
Synonyms: agency; body; center; corporation; entity; establishment
Opposite Meaning: disorganization

intercept (verb) /ˌɪntəˈsɛpt/
Definition: To stop, interrupt, or seize something that is in motion or on its way to a destination.
Example Sentence: "The police planned to intercept the stolen goods at the border."
Synonyms: ambush; arrest; block; capture; catch; deflect
Opposite Meaning: miss

invalidate (verb) /ɪnˈvæl ɪˌdeɪt/
Definition: To negate, nullify, or render something invalid or without legal or logical effect.
Example Sentence: "The committee voted to invalidate the election results based on evidence of fraud."
Synonyms: abolish; abrogate; annul; cancel; dismiss; disqualify
Opposite Meaning: validate

irrecoverable (adjective) /ˌɪr ɪˈkʌv ər ə bəl/
Definition: Cannot be recovered, regained, or retrieved.
Example Sentence: "His careless words caused irrecoverable damage to their friendship."
Synonyms: gone; irredeemable; irreparable; irretrievable; irreversible; irrevocable
Opposite Meaning: retrievable

laden (adjective) /ˈleɪdn/
Definition: Heavily loaded or burdened with a significant amount of weight, quantity, or responsibility.
Example Sentence: "The backpacker's journey was laden with unexpected challenges."
Synonyms: brimming; charged; encumbered; full; heavy; overloaded
Opposite Meaning: unburdened

legitimize (verb) /lɪˈdʒɪt əˌmaɪz/
Definition: To make something lawful, valid, or socially accepted, often by granting it official or formal recognition.
Example Sentence: "The new law aims to legitimize the use of medical marijuana for therapeutic purposes."
Synonyms: accredit; approve; authorize; empower; endorse; establish
Opposite Meaning: discredit

misinterpretation (noun) /ˌmɪsɪnˌtɜːprəˈteɪʃᵊn/
Definition: The act or process of understanding or comprehending something incorrectly or inaccurately.
Example Sentence: "The translator was careful to avoid any misinterpretation of the speaker's comments."
Synonyms: confusion; distortion; error; misapprehension; miscalculation; miscomprehension
Opposite Meaning: understanding

mutual (adjective) /mjuːtʃuəl/
Definition: Shared or experienced by two or more individuals or groups.
Example Sentence: "The couple made a mutual decision to end their relationship amicably."
Synonyms: bilateral; collective; common; cooperative; corresponding; interactive
Opposite Meaning: exclusive

notional (adjective) /ˈnoʊ ʃə nl/
Definition: Existing only in theory or as a concept, rather than having practical or concrete existence.
Example Sentence: "He had a notional plan in mind, but it required further development and refinement."
Synonyms: abstract; assumed; conceptual; conjectural; hypothetical; ideal
Opposite Meaning: practical

oasis (noun) /oʊˈeɪ sɪs/
Definition: A small, isolated area in a desert or arid region that contains a water source, usually in the form of a natural spring or well.
Example Sentence: "The oasis was a welcome sight after days of traversing the arid desert."
Synonyms: Eden; greenery; haven; lushness; refuge; respite
Opposite Meaning: desert

occupant (noun) /ˈɒk yə pənt/
Definition: A person or entity who currently resides, occupies, or holds a particular position or space.
Example Sentence: "The old castle is rumored to have a ghostly occupant who roams its halls at night."
Synonyms: dweller; habitant; householder; inhabitant; inmate; lessee
Opposite Meaning: visitor

oceanic (adjective) /ˌoʊ ʃiˈæn ɪk/
Definition: Relating to the ocean, which is the vast body of saltwater that covers a significant portion of the Earth's surface.
Example Sentence: "We embarked on an oceanic adventure, sailing across the vast blue expanse."
Synonyms: abyssal; aquatic; marine; maritime; nautical; pelagic
Opposite Meaning: terrestrial

pacify (verb) /ˈpasɪfʌɪ/
Definition: To calm, sooth or bring peace and tranquility to a person, group, or situation, often by reducing agitation, conflict, or unrest.
Example Sentence: "The parents bought an ice-cream to pacify their screaming child."
Synonyms: appease; assuage; comfort; compose; mollify; placate
Opposite Meaning: provoke

penmanship (noun) /ˈpɛn mənˌʃɪp/
Definition: The art or skill of writing by hand, particularly in a clear, legible, and aesthetically pleasing manner.
Example Sentence: "Her penmanship was admired by all, with its graceful loops and precise strokes."
Synonyms: calligraphy; chirography; cursive; handwriting; inscription; lettering
Opposite Meaning: illegibility

pertain (verb) /pəˈteɪn/
Definition: To be relevant or somehow associated with the subject being referenced.
Example Sentence: "The documents pertain to the legal case we discussed yesterday."
Synonyms: affect; appertain; apply; associate; befit; belong
Opposite Meaning: differ

piracy (noun) /ˈpʌɪrəsi/
Definition: The unauthorized use, reproduction, or distribution of copyrighted or trademarked materials, such as music, movies, software, and books.
Example Sentence: "The rise of streaming services has decreased the prevalence of piracy."
Synonyms: bootlegging; copying; hijacking; infringement; pirating; plagiarism
Opposite Meaning: originality

provocative (adjective) /prəˈvɒkətɪv/
Definition: Intending to stimulate or challenge the thoughts or emotions of others.
Example Sentence: "The advertisement used provocative imagery to grab viewers' attention."
Synonyms: alluring; challenging; controversial; edgy; evocative; exciting
Opposite Meaning: soothing

proximity (noun) /prɒkˈsɪm ɪ ti/
Definition: The state or quality of being near or close in space, time, or relationship.
Example Sentence: "The proximity of the airport to the hotel made it an ideal choice for frequent travelers."
Synonyms: accessibility; adjacency; closeness; contiguity; imminence; intimacy
Opposite Meaning: distance

quarantine (verb) /ˈkwɒrəntiːn/
Definition: To isolate or separate people, animals, or things that have been exposed to or are carriers of a contagious disease or infection.
Example Sentence: "The cruise ship was placed under quarantine after an outbreak of illness."
Synonyms: confine; detach; detain; immure; incarcerate; intern
Opposite Meaning: release

questionable (adjective) /ˈkwɛs tʃə nə bəl/
Definition: Raising doubts, uncertainties, or suspicions about its reliability, truthfulness, or legitimacy.
Example Sentence: "The witness provided a questionable alibi that raised doubts about his innocence."
Synonyms: debatable; doubtful; dubious; equivocal; fishy; iffy
Opposite Meaning: reliable

radius (noun) /ˈreɪ di əs/
Definition: The distance from the center of a circle or sphere to any point on its circumference or surface.
Example Sentence: "The geologist analyzed the radius of the impact crater to assess its size and force."
Synonyms: distance; expanse; extent; interval; length; measurement
Opposite Meaning: entirety

residence (noun) /ˈrɛz ɪ dəns/
Definition: A place where an individual or a group of people live or dwell.
Example Sentence: "The ambassador's residence hosted a diplomatic reception for foreign dignitaries."
Synonyms: abode; domicile; dwelling; habitat; home; house
Opposite Meaning: workplace

resident (noun) /ˈrɛz ɪ dənt/
Definition: An individual who resides or lives in a particular place or location for an extended period of time.
Example Sentence: "The new resident introduced themselves to the neighbors with a friendly gesture."
Synonyms: citizen; denizen; dweller; homeowner; householder; inhabitant
Opposite Meaning: visitor

response (noun) /rɪˈspɒns/
Definition: An action, behavior, or answer that is given in reaction to a stimulus, situation, or request.
Example Sentence: "The child's misbehavior was a response to feeling neglected by their parents."
Synonyms: acknowledgment; answer; comeback; feedback; reaction; rejoinder
Opposite Meaning: inaction

revival (noun) /rɪˈvaɪ vəl/
Definition: The concept of renewal, reawakening, or rejuvenation.
Example Sentence: "The small town experienced an economic revival after the opening of a new factory."
Synonyms: awakening; comeback; reawakening; rebirth; regeneration; rejuvenation
Opposite Meaning: decline

scale (verb) /skeɪl/
Definition: To climb, ascend, or reach the top of something, typically a physical object or a vertical surface.
Example Sentence: "The burglar used a rope to scale the high wall surrounding the mansion."
Synonyms: ascend; clamber; climb; conquer; escalate; gauge
Opposite Meaning: descend

spindle (noun) /ˈspɪndəl/
Definition: A cylindrical rod or pin that rotates around its axis, typically used for spinning fibers into thread or yarn.
Example Sentence: "The toy top had a spindle that was used to wind up the string."
Synonyms: axis; axle; mandrel; pin; pivot; pole
Opposite Meaning: block

subliminal (adjective) /səˈblɪmɪn(ə)l/
Definition: Operating below the threshold of conscious perception.
Example Sentence: "He argued that subliminal messages in music could affect behavior and emotions."
Synonyms: cerebral; concealed; conditioned; hidden; psychological; subconscious
Opposite Meaning: conscious

superlative (adjective) /suːˈpɜːlətɪv/
Definition: Of the highest degree or quality, often surpassing all others in its category.
Example Sentence: "Her superlative performance in the race earned her a gold medal."
Synonyms: excellent; exceptional; extraordinary; incomparable; outstanding; paramount
Opposite Meaning: inferior

tailored (adjective) /ˈteɪ lərd/
Definition: Specifically designed, customized, or modified to fit a particular purpose, individual, or situation.
Example Sentence: "She received a tailored training program to address her specific fitness goals."
Synonyms: adapted; adjusted; bespoke; crafted; customized; fitted
Opposite Meaning: generic

trustworthy (adjective) /ˈtrʌstˌwɜr ði/
Definition: Reliable, dependable, and deserving of trust or confidence.
Example Sentence: "Emma is a trustworthy friend who always keeps her promises and can be relied upon in times of need."
Synonyms: authentic; credible; dependable; ethical; faithful; honest
Opposite Meaning: untrustworthy

venue (noun) /ˈvɛn yu/
Definition: A specific location or place where an event or activity takes place.
Example Sentence: "The wedding reception was held at a beautiful outdoor venue overlooking the lake."
Synonyms: arena; facility; ground; hall; locale; location
Opposite Meaning: nowhere

vibe (noun) /vaɪb/
Definition: The atmosphere, energy, or overall feeling that is present in a particular place, situation, or individual.
Example Sentence: "The beach had a serene and tranquil vibe, perfect for relaxation."
Synonyms: ambiance; atmosphere; aura; character; energy; essence
Opposite Meaning: discord

wannabe (noun) /ˈwɒn əˌbi/
Definition: An individual who aspires to be like someone else or to achieve a certain status, profession, or level of success.
Example Sentence: "The talent show was filled with wannabes hoping to become the next singing sensation."
Synonyms: admirer; aspirant; copycat; copyist; dreamer; emulator
Opposite Meaning: original