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
chŏrēus: or -īus, i, m., = χορεῖος (sc. πούς, pes), in verse,
I A foot, later called trochaeus,—˘, Cic. Or. 63, 212; Quint. 9, 4, 80; 9, 4, 82; 9, 4, 96; Marc. Vict. p. 2487 P.—
II In later metrists, for the earlier tribrachys, ˘˘˘, Diom. pp. 261 and 475 P.