ἐρυθρίασις
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)
Ion. ἐρυθρ-ίησις, εως, ἡ,
A ruddiness, blushing, Hp.Decent.5, Hsch. s.v. λατραπία.
German (Pape)
[Seite 1036] ἡ, ion. ἐρυθρίησις, das Erröthen, Hippocr.