μεγαλορρημονέω
From LSJ
τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds
English (LSJ)
to be a boaster, LXX Ju.6.17, Str.13.1.40.
German (Pape)
ein Großsprecher sein, Strab. XIII.897.