ἰσονεφής

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

Plato, Laws, 626e

Greek (Liddell-Scott)

ἰσονεφής: -ές, ἔχων ὕψoς ἴσον τῷ ὕψει τῶν νεφῶν, φθάνων μέχρι τῶν νεφῶν, ἰσονεφέσιν ὄρεσιν Βασίλ. Σελευκ. ἐν βίῳ Θέκλ. σ. 294Α, ἔνθα διάφ. γραφ. ἀγχινεφέσιν.