χαλιφρονέω
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)
A to be light-minded, χαλιφρονέοντα σαοφρονίης ἐπέβησαν, Od.23.13.
German (Pape)
[Seite 1329] leichtsinnig, albern, thöricht sein, partic. praes., Od. 23, 13.