Convict (including the AV, Convince) - Vine's Expository Dictionary of New Testament Words
Convict (including the AV, Convince)[ 1,,G1651, elencho ]
(a) to convict, confute, refute," usually with the suggestion of putting the convicted person to shame; See Matthew 18:15, where more than telling the offender his fault is in view; it is used of "convicting" of sin, John 8:46; John 16:8; gainsayers in regard to the faith, Titus 1:9; transgressors of the Law, James 2:9; some texts have the verb in John 8:9;
(b) "to reprove," 1 Corinthians 14:24, RV (for AV, "convince"), for the unbeliever is there viewed as being reproved for, or "convicted" of, his sinful state; so in Luke 3:19; it is used of reproving works, John 3:20; Ephesians 5:11, Ephesians 5:13; 1 Timothy 5:20; 2 Timothy 4:2; Titus 1:13; Titus 2:15; all these speak of reproof by word of mouth. In Hebrews 12:5; Revelation 3:19, the word is used of reproving by action. See FAULT, REBUKE, REPROVE.
[ 2,,G1827, exelencho ]
an intensive form of No. 1, "to convict thoroughly," is used of the Lord's future "conviction" of the ungodly, Jude 1:15.
Note: For diakatelencho, "to confute powerfully in disputation," Acts 18:28 (AV, "convinced"), See CONFUTE.