κυσί

From LSJ

κῶς ταῦτα βασιλέϊ ἐκχρήσει περιυβρίσθαι → how will it be good enough for the king to be insulted with these things

Source

French (Bailly abrégé)

dat. pl. de κύων.

Russian (Dvoretsky)

κῠσί: dat. pl. к κύων.