vespĕrasco

I. v. inch. n. [vesper], to become evening, grow towards evening: vesperascente jam die, Tac. A. 16, 34: vesperascente caelo, Nep. Pelop. 2, 5.—Impers.: vesperascit, Ter. Heaut. 2, 3, 7: ubi jam vesperaverat, Gell. 17, 8, 1.