| Vocable | Translation |
| astrosus/astrosa/astrosum, AO Adjective | born under evil star, ill-starred |
| astutulus/astutula/astutulum, AO Adjective | cunning (person/action), crafty, clever, astute |
| astutus/astuta/astutum, AO Adjective | clever, astute, sly, cunning, expert |
| asureus/asurea/asureum, AO Adjective | azure, blue, of lapis lazuli |
| asymbolus/asymbola/asymbolum, AO Adjective | without paying a contribution, contributing nothi… |
| asyndetus/asyndeta/asyndetum, AO Adjective | standing without any connection with/reference to… |
| ater/atra/atrum, AO Adjective | black, dark, dark-colored (hair/skin), gloomy/mur… |
| Atheneus/Athenea/Atheneum, AO Adjective | Athenian, of Athens, of inhabitants of Athens/Ath… |
| Atheniensis/Atheniense, Athenienis M Adjective | Athenian, of Athens, of inhabitants of Athens/Ath… |
| athleticus/athletica/athleticum, AO Adjective | athletic, sporty, of/proper for an athlete, [ars … |
| atmosphaericus/atmosphaerica/atmosphaericum, AO Adjective | atmospheric |
| atomicus/atomica/atomicum, AO Adjective | atomic |
| atomus/atoma/atomum, AO Adjective | indivisible, atomic, that cannot be cut |
| atratus/atrata/atratum, AO Adjective | darkened, blackened, dingy, clothed in black, in/… |
| atricapillus/atricapilla/atricapillum, AO Adjective | black-haired |
| atricolor, atricoloris M Adjective | black, dark colored, letters written in (black) i… |
| atritus/atrita/atritum, AO Adjective | blackened |
| atrophus/atropha/atrophum, AO Adjective | affected by lack of nutrition, state of atrophy, … |
| atrotus/atrota/atrotum, AO Adjective | invulnerable |
| atrox, atrocis M Adjective | fierce, savage, bloody, heinous, cruel, severe, t… |
| attentus/attenta/attentum, AO Adjective | attentive, heedful, careful, conscientious, inten… |
| attenuatus/attenuata/attenuatum, AO Adjective | plain (style), bare, subdued, thin, impoverished,… |
| atterraneus/atterranea/atterraneum, AO Adjective | coming to/from the earth, earth-borne |
| attertiarius/attertiaria/attertiarium, AO Adjective | whole and a third |
| attertiatus/attertiata/attertiatum, AO Adjective | reduced/boiled down to a third |
| attestatus/attestata/attestatum, AO Adjective | confirmatory, corroboratory |
| Atticus/Attica/Atticum, AO Adjective | Attic, Athenian, classic, elegant |
| attiguus/attigua/attiguum, AO Adjective | contiguous, adjoining, adjacent, neighboring |
| attonitus/attonita/attonitum, AO Adjective | astonished, fascinated, lightning/thunder-struck,… |
| attractivus/attractiva/attractivum, AO Adjective | interesting |