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
subs.
P. ἀδυναμία, ἡ, ἀρρωστία, ἡ. P. and V. ἀπορία, ἡ.