embolium

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)

embŏlĭum: ii, n., = ἐμβόλιον,
I something thrown in; in scenic lang., an interlude, ballet, Cic. Sest. 54, 116 (embolia pertinent ad gestus saltatorios, Schol.).

embŏlĭum,¹⁵ ĭī, n. (ἐμβόλιον), intermède [sorte de pantomime qu’on jouait pendant les entractes] : Cic. Q. 3, 1, 24 ; Sest. 116.