abet Copy link Outline 1. adsum, fui, with dat.2. adjŭvo, jūvi, jūtum, 1 • abet, to aid a person in his designs (now usu. in a bad sense): 1. adsum, fui, with dat.: v. to side with. 2. adjŭvo, jūvi, jūtum, 1: now you too abet this woman's madness, jam tu quoque hujus adjuvas insaniam, Pl. Phr.: to ab. a crime, ministrum esse in maleficio, Cic.: v. abettor. v. to support, maintain.