A.acquaintance with a matter, understanding, skill, as in archery, S.Ph.1057; in war, Th.1.121, 6.72, 7.62; “ἐ. πρὸς τὸν πόλεμον” Lys.33.7 (fort. leg. περί)“ περὶ τὰ μαθήματα” Pl. Phlb.55d; “τοῦ νεῖν” Id.Grg.511c; ἐπιστήμῃ skilfully, οἱ μὴ ἐ. τοὺς ἐπαίνους “ποιούμενοι” Plot.5.5.13.
2.. professional skill: hence, profession, “οἱ τὴν ἰατρικὴν ἐ. μεταχειριζόμενοι” PFay.106.22 (ii A.D.); ζωγράφος τὴν ἐ. painter by profession, POxy.896.5 (iv A.D.).