καλλιπόταμος
From LSJ
ἐν μὲν γὰρ εἰρήνῃ καὶ ἀγαθοῖς πράγμασιν αἵ τε πόλεις καὶ οἱ ἰδιῶται ἀμείνους τὰς γνώμας ἔχουσι διὰ τὸ μὴ ἐς ἀκουσίους ἀνάγκας πίπτειν → in peace and prosperity states and individuals have better sentiments, because they do not find themselves suddenly confronted with imperious necessities
German (Pape)
[Seite 1310] mit schönen Flüssen, ὕδατος νοτίς, das schöne Flußnaß, Eur. Phoen. 648.