διαβεβαιόομαι diabebaióomai

Meaning

to confirm thoroughly (by words), i.e. asseverate

In the King James Version: affirm constantly

Derivation: middle voice of a compound of G1223 (διά) and G950 (βεβαιόω);

Where it is used

• 1 Timothy 1:7 They want to be teachers of the law, but they do not understand what they are saying or that which they so confidently assert.
• Titus 3:8 This saying is trustworthy. And I want you to emphasize these things, so that those who have believed God will take care to devote themselves to good deeds. These things are excellent and profitable for the people.