πατροφονεύς
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)
έως, Ep. ῆος, ὁ,
A murderer of one's father, [Ὀρέστης] ἔκτανε πατροφονῆα Αἴγισθον... ὅ οἱ πατέρα κλυτὸν ἔκτα Od.1.299, cf. 3.197.
German (Pape)
[Seite 536] ὁ, Vatermörder, Od. 1, 299. 3, 197. 307.
Greek (Liddell-Scott)
πατροφονεύς: έως, Ἐπικ. ῆος, ὁ, ὁ φονεύσας τὸν πατέρα τινός, [Ὀρέστης] ἔκτανε πατροφονῆα Αἴγισθον .. ὅ οἱ πατέρα κλυτὸν ἔκτα Ὀδ. Α. 299, πρβλ. Γ. 197.