ἥμισυ
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 (Strong)
neuter of a derivative from an inseparable prefix akin to ἅμα (through the idea of partition involved in connection) and meaning semi-; (as noun) half: half.
Russian (Dvoretsky)
ἥμῐσυ:
I τό (sc. μέρος) половина (τοῦ στρατοῦ Thuc.): ἥ. οὗ δεῖ Plat. половина того, что нужно.
II adv. пополам Hes., Pind.