ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
P. and V. ἐπιστάτης, ὁ, ἐπίσκοπος, ὁ (Plato), V. σκοπός, ὁ.
manager: P. and V. ταμίας, ὁ, Ar. and P. ἐπιμελητής, ὁ.