μεγαλαλκής
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)
ές,
A = μεγαλοσθενής, Hsch.
German (Pape)
[Seite 104] ές, von großer Stärke, Sp., wie Or. Sib.; poet. bei Plut. Flam. 16; Hesych. erkl. μεγαλοσθενής.