pernecessarius
From LSJ
ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
Latin > English (Lewis & Short)
per-nĕcessārĭus: a, um, adj.
I Very necessary: tempus, Cic. Att. 5, 21, 1: res, Dig. 4, 4, 11, § 4.—
II Very closely connected with one: amicus, Cic. Fl. 6, 14: homo, id. de Or. 2, 50, 202; cf.: pro homine intimo ac mihi pernecessario, id. Fam. 13, 69.—Subst.: meus familiaris et Leptae nostri familiarissimi pernecessarius, Cic. Fam. 9, 13, 1: meos, id. ib. 13, 40.
