ἥμισυ
From LSJ
καὶ οἱ ἀμαθέστατοι τῶν ἰατρῶν τὸ αὐτὸ σοὶ ποιοῦσιν, ἐλεφαντίνους νάρθηκας καὶ σικύας ἀργυρᾶς ποιούμενοι καὶ σμίλας χρυσοκολλήτους: ὁπόταν δὲ καὶ χρήσασθαι τούτοις δέῃ, οἱ μὲν οὐδὲ ὅπως χρὴ μεταχειρίσασθαι αὐτὰ ἴσασιν → the most ignorant of doctors do the same as you, getting themselves ivory containers, silver cupping instruments, and gold-inlaid scalpels; but when it's time to use those things, they haven't the slightest notion of how to handle them
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.
