ἐπήρετμος
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (LSJ)
ον,
A at the oar, ἑταῖροι ἥατ' ἐπήρετμοι Od.2.403; ἐ. πόνοι Opp.H.4.76. 2 equipped with oars, νῆες Od.5.16, 14.224, al.