κέλαδος
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)
ὁ, poet. word,
A a noise as of rushing waters: generally, loud noise, din, clamour, θῆκε πολὺν κέλαδον καὶ ἀϋτήν, of persons quarrelling, Il.9.547, cf. 18.530, Od.18.402; κ. Εὐίου E.Ba.578 (lyr.). 2 of musical sound, κ. λύρας Id.IT1129 (lyr.), cf. Cyc.489 (anap.). II loud clear voice, as of an oracle, Pi.P.4.60; shout, cry, κ. οὐ παιώνιος A.Pers.605, cf. 388, Ch.341 (anap.), S.El.737, etc. 2 chirp of the τέττιξ, Ael.NA1.20; of the twittering of birds, κ. παντομιγής Lyr.Alex.Adesp.7.6.