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
adj.
Going back: V. ἄψορρος, παλίσσυτος. Quiet: P. and V. ἥσυχος, ἡσυχαῖος, ἀπράγμων (Eur., Frag.), P. ἡσύχιος; see shy.