σκίναξ
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
English (LSJ)
[ῐ], ᾰκος, ὁ, ἡ,
A quick, nimble, epith. of hares, σ. νεαροῖο λαγωοῦ Nic.Th.577; so ὁ σ.,= λαγώς, Id.Al.67; cf. κίνδαξ.