συνναυμαχέω
From LSJ
Ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → It is impossible to know the spirit, thought, and mind of any man before he be versed in sovereignty and the laws
English (LSJ)
A engage in a sea-fight along with, τισι Hdt.8.44, cf. Ar.Ra.702 (troch.), Th.1.73, IG12.108.41.
Greek (Liddell-Scott)
συνναυμᾰχέω: ναυμαχῶ ὁμοῦ μετά τινος, τινι Ἡρόδ. 8. 44, πρβλ. Ἀριστοφ. Βατρ. 702· ἐν Σαλαμῖνι ξυνναυμαχῆσαι Θουκ. 1. 73.