διαβεβαι-όω,
confirm, ὑπόληψιν [[ 3rd c.AD(?): Diogenes Laertius 8.70 ] Refs 3rd c.AD+]:—usually middle διαβεβαι-όομαι, maintain strongly, affirm, confirm, [[ 4th c.BC: Demosthenes Orator 17.30; οἱ πρεσβύτεροι δ. οὐδέν 4th c.BC: Aristoteles Philosophus “Rhetorica” 1389b16; δ. γεγονέναι τι 1st c.BC: Diodorus Siculus Historicus 13.90, cf. Aristeas 99, 1st c.BC: Dionysius Halicarnassensis 2.39, “BGU” 19i17 (2nd c.AD), “POxy.” 67.10 (4th c.AD)] Refs 4th c.BC+]; to be positive, περί τινος [[ 2nd c.BC: Polybius Historicus 12.12.6, 2nd c.AD: Sextus Empiricus Philosophus “Πυρρώνειοι ὑποτυπώσεις” 1.191 ] Refs 2nd c.BC+]:—passive, [[ 1st c.BC: Philodemus Gadarensis Epigrammaticus “Rh.” 1.226S., “Sign.” 17. ] Refs 1st c.BC+]