φρονηματίας
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)
ου, ὁ,
A self-confident, high-spirited, Arist.Pol.1313a40, Longin.9.4; φ. ἐπὶ τῇ ἱππικῇ X.Ages.1.24; of a horse, Poll.1.195.
German (Pape)
[Seite 1308] ὁ, der viel Selbstgefühl, Selbstvertrauen hat, Xen. Ages. 1, 24. – Gew. im tadelnden Sinne, hochmüthig, eingebildet, dünkelhaft, Arist. pol. 5, 11, Plut.