περιέννυμι
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
English (LSJ)
Ep. Verb used in aor. Act. and Med.,
A put round, περὶ δ' ἄμβροτα εἵματα ἕσσον Il.16.670,680 ; περὶ μὲν τὰ ἃ τεύχεα ἕσσε 18.451 :—Med., [χλαῖναν] περιέσσασθαι to put on one's cloak, Hes.Op. 539.