Abbott-Smith Manual Greek Lexicon
δια-βεβαιόομαι (G1226)
2 * δια-βεβαιόομαι , -οῦμαι to affirm confidently : Tit 3:8 ; seq. περί , I Ti 1:7 (Cremer, 140).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain
Strong's G1226 · Greek
διαβεβαιόομαι
diabebaioomai · dee-ab-eb-ahee-o'-om-ahee
middle voice of a compound of 1223 and 950; to confirm thoroughly (by words), i.e. asseverate