vespĕrus — Lewis & Short
vespĕrus, a, um, adj.vespera,
I of or belonging to the evening, evening-:
his horae rigandi matutina atque vespera,Plin. 19, 12, 60, § 183 (dub.;
al. matutino atque vespera): tempus vesperum,Cael. Aur. Acut. 1, 15, 141; 1, 15, 151.