Strong's #1226: diabebaioomai (pronounced dee-ab-eb-ahee-o'-om-ahee)

middle voice of a compound of 1223 and 950; to confirm thoroughly (by words), i.e. asseverate:--affirm constantly.

Thayer's Greek Lexicon:

́

diabebaioomai

1) to affirm strongly, assert confidently

Part of Speech: verb

Relation: middle voice of a compound of G1223 and G950

Usage:

This word is used 2 times:

 

1 Timothy 1:7: "they say, nor whereof they affirm."
Titus 3:8: "these things I will that thou affirm constantly, that they which have believed in God might be careful"