| artless | Having no art or skill; uncultured and unsophisticated | |
| artifice | Clever or cunning devices or expedients, especially as used to trick or deceive others | |
| articulate | Having or showing the ability to speak fluently and coherently | |
| arrogate | To take or claim for oneself without justification | |
| arduous | Involving or requiring strenuous effort; difficult and tiring | |
| archaic | very old or old-fashioned | |
| arch | a curved symmetrical structure spanning an opening and typically supporting the weight of a bridge, roof, or wall above | |
| arcane | Understood by few; mysterious or secret | |
| arbitrary | Based on random choice or personal whim, rather than any reason or system | |
| apropos | With reference to; concerning | |