συναθλέω
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)
A = συναγωνίζομαι, τινι with one, Ep.Phil.4.3; struggle together, τινι for a thing, ib.1.27. II impress by practice upon, μεταφορᾶς μνήμῃ συνηθλημένης D.S.3.4.