δυσεκφόρητος
From LSJ
οἵ γε καὶ ἐν τῷ παρόντι ἀντιπάλως μᾶλλον ἢ ὑποδεεστέρως τῷ ναυτικῷ ἀνθώρμουν → whose navy, even as it was, faced the Athenian more as an equal than as an inferior
English (LSJ)
ον, = δυσέκφορος (hard to pronounce, hard to utter), DH. Comp. 22.
Spanish (DGE)
-ον
difícil de pronunciar subst. τὸ δ. dificultad de pronunciación τὸ ἐν τῇ κράσει τῶν γραμμάτων δ. D.H.Comp.22.21 (var.).