C / contĕnēbrasco
verb hapax

contĕnēbrasco

2nd PP con-tĕnē^brascere · 3rd PP con-tĕnē^brāvi · conj. 3rd
[tenebrae; cf. vesperasco]
to become; grow very dark
to become or grow very dark, Varr. R. R. 2, 2, 11.