ἐφυβρίζειν
From LSJ
τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds
Greek > English (Woodhouse Verbs Reversed)
Lexicon Thucydideum
contumeliosas voces iacere, to utter insulting words, 6.63.3.