εὐχειρία
From LSJ
Γιγνώσκεις οὖν καὶ σὺ τὰ στρατηγικὰ ἔργα → Therefore you, too, know the works (i.e. job) of a general.
English (LSJ)
Ion. -ιη, ἡ,
A manual dexterity, skill, ἀνόητος εὐ. Hp.Art. 35, cf. Ruf. ap. Orib.inc.20.1; in flute-playing, Poll.4.72; in battle, Plb.11.13.3, 16.19.1, Fr.158 (pl.), Hdn.1.17.12, etc. (Sts. confused in codd with εὐχέρεια.)