ὑπότρομος
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)
ον,
A quivering, shaking, Plu.2.435b; somewhat afraid or timid, Aeschin.3.159, Luc. DDeor.19.1, etc.
German (Pape)
[Seite 1237] ein wenig zitternd, furchtsam; Aesch. 3, 159; Luc. D. D. 19, 1.