vastesco: ĕre,I v. inch. n. vastus, to become desert or waste: ne scelere tuo Thebani vastescant agri, Att. ap. Non. 185, 10.
vāstēscō, ĕre (vastus), intr., devenir désert : Acc. Tr. 600.
vāstēsco, ere (vastus), öde-, wüst werden, Acc. tr. 600.