ἐφυβρίζειν

From LSJ

τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἐφυβρίζω): insult

Lexicon Thucydideum

contumeliosas voces iacere, to utter insulting words, 6.63.3.