ὠκυπόδεσσι

From LSJ

ὣς ὁ μὲν ἔνθ' ἀπόλωλεν, ἐπεὶ πίεν ἁλμυρὸν ὕδωρ → so there he perished, when he had drunk the salt water

Source

French (Bailly abrégé)

dat. pl. ép. de ὠκύπους.