| Term | Definition |
| abase | v. lower; humilate |
| abash | v. embarrass |
| abate | v. subside; decrease, lessen |
| abbreviate | v. shorten |
| abdicate | v. renounce; give up |
| abduction | n. kidnapping |
| aberrant | n. abnormal or deviant |
| abet | v. aid, usually in doing something wrong; encourage |
| abeyance | n. suspended action |
| abhor | v. detest; hate |
| abject | adj. wretched; lacking pride |
| abjure | v. renounce upon oath |
| ablution | n. washing |
| abnegation | n. repudiation; self-sacrifice |
| abolish | v. cancle; put an end to |
| abominable | adj. detestable; extremely unpleasant; very bad |
| aboriginal | adj., n. being the first of its kind in a region; primitive; native |
| abortive | adj. unsuccessful; fruitless |
| abrade | v. wear away by friction; scrape; erode |
| abrasive | adj. rubbing away; tending to grind down |
| abridge | v. condense or shorten |
| abrogate | adj. abolish |
| abscond | v. depart secretly and hide |
| absolute | adj. complete; totally unlimited; certain |
| absolve | v. pardon ( an offense ) |
| absorb | v. assimilate or incorporate; suck or drink up; wholly engage |
| abstain | v. refrain; hold oneself back vouluntarily from an action or parctice |
| abstemious | adj. sparing in eating and drinking; temperate |
| abstinence | n. restraint from eating or drinking |
| abstract | adj. theoretical; not concrete; nonrepresentational |
| abstruse | adj. obscure; profound; difficult to understand |
| abundant | adj. plentiful; possessing riches or resources |
| abusive | adj. coarsely insulting; physically harmful |
| abut | v. border upon; adjoin |
| abysmal | adj. bottemless |
| abyss | n. enormous chasm; vast bottomless pit |
| academic | adj. related to a school; not practical or directly useful |
| accede | v. agree |
| accelerate | v. move faster |
| accentuate | v. emphasize; stress |
| accessible | adj. easy to approach; obtainable |
| accessory | n. additional object; useful but no essential |
| acclaim | v. applaud; announce; obtainable |
| acclimate | v. adjust to climate |
| acclivity | n. sharp upslope of a hill |
| accolade | n. award of merit |
| accommodate | v. oblige or help someone; adjust or bring into harmony; adapt |
| accomplice | n. partner in crime |
| accord | n. agreement |
| accost | v. approach and speak first to a person |
| accoutre | v. equip |
| accretion | n. growth; increase |
| accrue | v. come about by addition |
| acerbity | n. bitterness of speech and temper |
| acetic | adj. vinegary |
| acidulous | adj. slightly sour; sharp, caustic |
| acknowledge | v. recognize; admit |
| acme | n. top; pinnacle |
| acoustics | n. science of sound; quality that makes a room easy or hard to hear in |
| acquiesce | v. assent; agree without protesting |
| acquire | v. obtain; get |
| acquittal | n. deliverance from a charge |
| acrid | adj. sharp; bitterly pungent |
| acrimonious | adj. bitter in words or manner |
| acrophobia | n. fear of heights |
| actuarial | adj. calculating; pertaining to insurance statistics |
| actuate | v. to motivate |
| acuity | n. sharpness |
| acumen | n. mental keenness |
| acute | adj. quickly perceptive; keen brief and severe |
| adage | n. wise saying; proverb |
| adamant | adj. hard; inflexible |
| adapt | v. alter; modify |
| addendum | n. an addition or supplement |
| addiction | n.complusive, habitual need |
| addle | v. muddle; drive crazy; become rotten |
| address | v. direct a speech to; deal with or discuss |
| adept | adj. expert at |
| adhere | v. stick fast |
| adherent | v. supporter; hollower |
| adjacent | adj. adjoining; neighboring; close by |
| adjunct | n. something added on or attached (generally nonessential or inferior) |
| admonish | v. warn; reprove |
| admonition | n. warning |
| adorn | v. decorate |
| adroit | adj. skillful |