ἐλεγκτήρ
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
ῆρος, ὁ,
A one who convicts or detects, τῶν ἀποκτεινάντων Antipho 2.4.3.
German (Pape)
[Seite 793] ῆρος, ὁ, der Ueberführer, Antiph. II δ 5, wo sonst ἐλεγκτής stand.