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ACT Vocabulary
| Term | Definition |
|---|---|
| Abundant | Present in large quantities |
| Accurate | Correct; free from errors |
| Acquire | To come into possession of |
| Adamant | Refusing to change an opinion |
| Adequate | Enough to meet a specific task or purpose |
| Adequate | Enough to suit your needs |
| Adjacent | Close to or next to |
| Adverse | Unfavorable; against one’s desires |
| Affable | Friendly, easy to talk to |
| Ambiguous | Having several potential meanings; unclear and difficult to understand |
| Ambitious | Having a powerful desire for success or achievement |
| Annihilate | To destroy or kill |
| Antipathy | A strong feeling of dislike |
| Apparent | Readily seen or understood |
| Ascent | Upward movement; advancement |
| Attribute | To give credit |
| Arbitrary | Based on a whim or random decision |
| Arduous | Requiring a lot of effort |
| Benevolent | Kind, generous |
| Bias | A preconception that prevents objectivity |
| Bolster | To support, strengthen, or fortify |
| Burgeoning | Growing quickly; flourishing |
| Bypass | To avoid |
| Candid | Direct, blunt |
| Candor | The trait of being honest and frank |
| Capitalize | To use to your advantage |
| Catalyst | Something that causes a change or new event |
| Ceaseless | Unending, without pause |
| Censure | To express strong disapproval |
| Clarify | To make clear or intelligible |
| Coincide | To happen at the same time |
| Competent | Sufficiently qualified |
| Complacent | Satisfied, with no desire to change or improve |
| Complement | To make perfect or complete |
| Conceal | To hide |
| Concur | To agree |
| Condense | To reduce to a shorter form; to make more compact |
| Confine | To limit or restrict; to enclose within bounds |
| Confluence | A coming together of people or things; a joining |
| Consecutively | One after another in uninterrupted succession |
| Console | To give comfort; to lessen grief |
| Contention | A dispute; opposition; rivalry |
| Contours | Line or edge that defines the bounds of an object |
| Contradict | To be in contrast with |
| Controversial | Highly debatable and causing contention |
| Conventional | Abiding by accepted standards |
| Convey | To pass on or transfer (information) |
| Copious | Abundant |
| Cordial | Friendly; courteous |
| Crucial | Critical; extremely important |
| Crude | Rudimentary; unrefined |
| Cumbersome | Unwieldy; burdensome |
| Deceive | To trick or deceive |
| Deference | Respect; regard |
| Deficiency | A lack |
| Depict | To represent |
| Deplete | To overuse over time so that resources become scarce. |
| Desolate | Bare, empty |
| Derive | To deduce; to obtain from a source or origin |
| Devoid | Lacking |
| Dexterity | Skill in moving the hands or body; cleverness |
| Digress | To stray from the main topic |
| Diminish | To shrink or reduce |
| Discrepancy | An inconsistency or difference |
| Dismantle | To take apart |
| Distinctive | Distinguishing |
| Dominant | Ruling, controlling; being in a position of authority |
| Efficient | Maximizing productivity |
| Eliminate | To remove |
| Eminent | Superior or distinguished; high in position or status |
| Engrossed | To fully occupy the mind or attention |
| Erode | To wear away (figuratively or literally) |
| Estimate | An approximate value |
| Eternal | Without beginning or end |
| Exemplify | To serve as a superior example of a thing |
| Expend | To use up (as in energy or money) |
| Expedite | To speed the process |
| Expertise | Expert knowledge or skill in a particular skill |
| Expose | To reveal or unmask |
| Extensive | Covering a large area; great in number |
| Fastidious | Hard to please; taking excessive care |
| Flaw | An imperfection or defect |
| Fluctuate | To be unstable; to rise and fall |
| Frenetic | Frantic, frenzied |
| Functional | Capable of working or operating |
| Grandeur | Being awesome or impressive |
| Historic | Important in history |
| Hitherto | Up until now |
| Hostile | Harmful, dangerous |
| Hypothetical | Supposed; related to a hypothesis |
| Indifferent | Apathetic, not caring |
| Immense | Huge, vast |
| Imminent | About to happen |
| Inconceivable | Unimaginable |
| Informal | Casual, without ceremony |
| Inhibit | To hinder or prohibit |
| Innovative | New or different |
| Intricate | Complex; having many interrelated parts |
| Jumbled | An unorganized mess; confused or muddled |
| Languid | Slow; lacking energy |
| Latter | The second of two things |
| Listless | Indifferent; having little energy or interest |
| Lucrative | Capable of making a lot of money; profitable |
| Malicious | Harmful, spiteful |
| Malleable | Capable of being molded or changed |
| Modify | To change, alter, or tweak |
| Momentous | Historically significant |
| Novel | New, innovative |
| Nuance | A subtle difference in meaning |
| Objectivity | Judgment based on observations instead of emotions or opinions |
| Obsolete | No longer used; rare or uncommon |
| Omnipotent | Almighty and all powerful |
| Paradox | An idea that seems contradictory or improbable but is, in fact, true |
| Paramount | First in importance |
| Partial | Preferring one option over others |
| Perpetual | Continuous, everlasting |
| Perplex | To confuse or complicate |
| Plausible | Believable, worthy of trust |
| Potent | Powerful |
| Pragmatic | Practical |
| Precise | Exact; strictly defined |
| Predate | To come before (in time) |
| Premature | Occurring too soon |
| Prescience | Foresight, knowing something before it happens |
| Prestigious | Having a strong reputation; impressive |
| Proficient | Competent or skilled at a thing |
| Prohibit | To forbid or prevent |
| Prolific | Producing great quantities, often frequently |
| Prolong | To make longer in time |
| Prominent | Easily noticeable; well-known |
| Protrude | To project |
| Qualitative | Involving qualities of something (features and content) |
| Quantitative | Involving quantities (numbers and amounts) |
| Radical | Extreme; strikingly different from the traditional form |
| Reinforce | To strengthen or add support to |
| Relevant | Closely related to the matter at hand |
| Resolute | Determined; set in opinion |
| Retrospect | Contemplation of the past |
| Revive | To restore to live or consciousness; to activate |
| Revolutionize | To bring about significant change |
| Riddled | Full of small holes |
| Rigorous | Severe or harsh |
| Scrutinize | To examine carefully and critically |
| Skeptical | To show doubt |
| Solidarity | The joining of commonalities or common purposes among a group |
| Sparingly | Insufficiently, meagerly, or in a restricted manner |
| Static | Showing little or no change |
| Staunch | Loyal, steadfast |
| Strenuous | Requiring intense exertion |
| Subsequently | Coming later or after |
| Subversive | Intending to overthrow, deceive, or destroy |
| Sufficient | Enough; just meeting a requirement |
| Sumptuous | Luxurious; costly |
| Synonymous | Expressing the same idea |
| Tedious | Boring |
| Tentative | Not yet finalized |
| Translucent | Permitting some, but not all light to pass through |
| Trivial | Of little importance or value |
| Ubiquitous | Being everywhere at once |
| Unprecedented | Never before known or experienced |
| Validate | To prove or declare valid |
| Viability | Ability to be done in a practical or useful way |
| Vital | Urgently necessary |
| Affluent | Having an abundance of goods or riches |
| Afflict | To cause pain or suffering to |
| Alleviate | To make (something, such as pain or suffering) more bearable |
| Convenient | Suited to personal comfort or to easy performance |
| Advocate | To support or argue for |
| Finite | Having definite or definable limits |
| Contingent | Dependent on |
| Meticulous | Excessive care in the consideration of details |
| Adapt | To make fit or suitable by changing or adjusting. |
| Streamline | To improve the efficiency of |
| Evolve | To develop gradually |
| Supersede | To cause to be set aside or dropped from use as inferior or obsolete and replaced by something else. |
| Versatile | Competent in many things |
| Expand | To increase the size, volume, quantity, or scope of |
| Rigid | Not bending or flexible |
| Opaque | Not letting light pass through |
| Rapid | Moving, progressing, or occurring with speed |
| Temporary | Not permanent |
| Eternal | Without beginning or end |
| Brief | Of short duration or extent |
| Careless | Taking insufficient care; negligent |
| Passionate | Dominated by powerful emotions |
| Sporadically | At an occasional, infrequent, or irregular frequency |
| Haphazard | Random; chaotic |
| Evident | Obvious; plain |
| Nullify | To make valueless or useless |
| Inadequate | Not sufficient |
| Excessive | Being too much or too great |
| Preserve | To keep in perfect or unaltered condition |
| Maintain | To keep in an existing state |
| Replete | Well-filled or plentifully supplied |
| Proficient | Competent; skilled; adept |
| Elevate | To raise in rank or position; promote |
| Ineffective | Not producing the desired effect |
| Hinder | Get in the way of; prevent; stop |
| Align | To bring into proper coordination. |
| Contrary | Opposed; in opposition |