τριηράρχης
From LSJ
τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
English (LSJ)
A v. τριήραρχος.
Greek (Liddell-Scott)
τριηράρχης: -ου, ὁ, μεταγεν. τύπος ἀντὶ τοῦ τριήραρχος, τριηράρχας μὲν ὠνόμαζον οἱ παλαοὶ τοὺς ἄρχοντας τῶν τριήρων Γαλην. τ. 6, σ. 39.