σύμμαρτυς
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
ῠρος, ὁ, ἡ,
A fellow-witness, joint-witness, S.Ant.846 (lyr., pl.), Pl.Ep.311e; τινος of or to a thing, Id.Phlb.12b, cf. CIG3194 (Smyrna).
