ἀμφίβιον

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

Russian (Dvoretsky)

ἀμφίβιον: τό (sc. ζῷον) земноводное животное Plut.