αἴδεσσαι

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

Source

French (Bailly abrégé)

2ᵉ sg. ao. impér. de αἰδέομαι.