ἐξαυθαδίζομαι
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
strengthd. for αὐθαδίζομαι, J.AJ15.10.4.
Greek (Liddell-Scott)
ἐξαυθᾱδίζομαι: ἐπιτεταμένον ἀντὶ τοῦ αὐθαδίζομαι, Ἰωσήπου Ἰουδ. Ἀρχ. 15. 10. 4.