Ποντοθήρης
From LSJ
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
Russian (Dvoretsky)
Ποντοθήρης: ου ὁ морской охотник, т. е. рыболов Anth.
