| A | B |
| antecedents | preceding events or circumstances that influence what comes later; ancestors or early background |
| anticlimax | letdown i nthought or emotion |
| antipathy | aversion; dislike |
| antiquated | obsolete; outdated |
| antiseptic | substance that prevents infection |
| antithesis | contrast; direct opposite of or to |
| apathy | lack of caring; indifference |
| aplomb | poise; assurance |
| apocryphal | untrue; made up |
| apostate | one who abandons his religious faith or political beliefs |
| append | attach |
| apprehension | fear; discernment; capture |
| apprenticeship | time spent as a novice learning a trade from a skilled worker |
| appropriate | fitting or suitable; pertinent; acquire; take possession of for one's own use; set aside for a special purpose |
| arable | fit for growing crops |
| arbiter | a person with power to decide a dispute; judge |
| arbitrary | unreasonable or capricious; randomly selected without any reason |
| archipelago | group of closely located islands |
| arduous | hard; strenuous |
| aria | operatic solo |
| arid | dry; barren |
| aristocracy | hereditary nobility; previleged class |
| arrogance | pride; haughtiness |
| articulate | effective; distinct |
| ascendancy | controlling influence |
| ascetic | practicing self-denial; austere |