ἀπαυθαδίζεσθαι

From LSJ

οὔτε σοφίας ἐνδείᾳ οὔτ' αἰσχύνης περιουσίᾳ → neither from lack of knowledge nor from superfluity of modesty

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: ἀπαυθαδίζομαι) be self-opiniated