ἀντιφονεύω
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
A murder in return, Sch.E.Or.415.
Greek (Liddell-Scott)
ἀντιφονεύω: ἀνταποδίδω φόνον ἀντὶ φόνου, Σχόλ. εἰς Εὐρ. Ὀρ. 415, Ἐπιφάν.
Spanish (DGE)
asesinar a su vez τοὺς φονέας Sch.E.Or.415, Ptol.Gnost.Ep.p.454.21.