unlawful Copy link Outline 1. with verb to be, fas, with some negative word; nĕfas2. expr. by contra jus, contra legem (with ref. to state law)3. expr. it is u., by lĭcet, with negative foll. by dat. or absol.4. vĕtĭtus (forbidden)5. inconcessus (rare)6. illĭcĭtus (cf. supr. 37. with ref. to legal business • unlawful: 1. with verb to be, fas, with some negative word; nĕfas: with ref. to divine or natural law: they think it to be u. to taste ..., gustare ... fas non putant, Caes. B. G. 5, 12: so, neque fas existimant, ib. 6, 14: in an u. manner, contra quam fas erat, Cic. Clu. 5, 12. So, it is u., nefas est: Cic.: Caes. And after a prep., per [omne] fas ac nefas (by lawful or u. means), Liv. 6, 14, med. 2. expr. by contra jus, contra legem (with ref. to state law): to act in an u. manner, contra jus facere, Cic. Caes., init.: v. unlawfully. 3. expr. it is u., by lĭcet, with negative foll. by dat. or absol.: it is u. for any one to lead an army against his country, nemini licet exercitum contra patriam ducere, Cic. Ph. 13, 6, 14: v. lawful, to be. 4. vĕtĭtus (forbidden): v. to forbid. 5. inconcessus (rare): Virg. Aen. 1, 651 (i. hymenaei). 6. illĭcĭtus (cf. supr. 3: rare): u. love, i. amor, Tac. A. 12, 5: Val. Fl. 7. with ref. to legal business: u. days, dies nefasti, Liv. 1, 19, extr. (Non legitimus = not prescribed by law, not in such form as the law specifies and directs). See also unjust, wicked.