Testify - Vine's Expository Dictionary of New Testament Words
Testify
[ 1,,G3140, martureo ]for which See WITNESS, is frequently rendered to bear witness, to witness," in the RV, where AV renders it "to testify," John 2:25; John 3:11, John 3:32; John 5:39; John 15:26; John 21:24; 1 Corinthians 15:15; Hebrews 7:17; Hebrews 11:4; 1 John 4:14; 1 John 5:9; 3 John 1:3. In the following, however, the RV, like the AV, has the rendering "to testify," John 4:39, John 4:44; John 7:7; John 13:21; Acts 26:5; Revelation 22:16, Revelation 22:18, Revelation 22:20.
[ 2,,G1957, epimartureo ]
"to bear witness to" (a strengthened form of No. 1), is rendered "testifying" in 1 Peter 5:12.
[ 3,,G3143, marturomai ]
primarily, "to summon as witness," then, "to bear witness" (sometimes with the suggestion of solemn protestation), is rendered "to testify" in Acts 20:26, RV (AV, "I take ... to record"); Galatians 5:3; Ephesians 4:17; 1 Thessalonians 2:11, in the best texts (some have No. 1), RV, "testifying" (AV, "charged").
[ 4,,G1263, diamarturomai ]
"to testify or protest solemnly," an intensive form of No. 3, is translated "to testify" in Luke 16:28; Acts 2:40; Acts 8:25; Acts 10:42; Acts 18:5; Acts 20:21, Acts 20:23-Acts 20:24; Acts 23:11; Acts 28:23; 1 Thessalonians 4:6; Hebrews 2:6; "to charge" in 1 Timothy 5:21; 2 Timothy 2:14; 2 Timothy 4:1.
[ 5,,G4303, promarturomai ]
"to testify beforehand," occurs in 1 Peter 1:11, where the pronoun "it" should be "He" (the "it" being due to the grammatically neuter form of pneuma; the personality of the Holy Spirit requires the masculine pronoun).
Note: In Revelation 22:18 some texts have summartureo, "to bear witness with." See WITNESS.