Ars est celare artem.—True art is to conceal art.
Assumpsit.—It is assumed or taken for granted.
Astra castra, Numen lumen.—The stars my camp, the Deity my light.
At spes non fracta.—But hope is not broken.
Au fait.—Well instructed; master of it.
Au fond.—To the bottom, or main point.
Au pied de la lettre.—Literally.
Au pis aller.—At the worst.
Au revoir.—Farewell.
Audi alteram partem.—Hear the other side.