compulsion Copy link Outline 1. vis2. cŏactu (only in abl.)3. nĕcessĭtas • compulsion: 1. vis: v. force, violence. 2. cŏactu (only in abl.): by the c. and importunity employed by myself, c. atque efflagitatu meo, Cic.: Caes. 3. nĕcessĭtas: I acted under force and c., vi et n. coactus feci, Cic.: also less freq. nĕcessĭtūdo: that is c. which cannot, by any force, be resisted, necessitudo est cui nulla vi obsisti potest, Cic. Phr.: to use c. to a man, cogere: v. to compel: as opp. to willingly, spontaneously, "by compulsion" may be expr. by invitus: v. unwillingly.