G3143
μαρτύρομαι
to testify
μαρτύρομαι (μάρτυρ), [in LXX: Jdth.7:28, 1Ma.2:56 א)* ;] to summon as witness (M, Th., 25 f.; Hort., 1Pe., 53 f.; Lft., Notes, 29; Ga 203), hence, __(a) to protest, affirm solemnly: before ὅτι, Act.20:26, Gal.5:3; __(b) to adjure, beseech: with dative of person(s), Act.26:22; with accusative and inf., Eph.4:17; before εἰς, 1Th.2:12 (cf. δια-, προ-μαρτύρομαι).† (AS)
The KJV translates G3143 in the following manner:
testify (4x), record (2x), take (2x)
Full Thayer's lexicon entry
μαρτύρομαι — martýromai
μαρτύρομαι (from μάρτυρ (cf. μάρτυς));
1. to cite a witness, bring forward a witness, call to witness (Tragg., Thucydides, Plato, and following); to affirm by appeal to God, to declare solemnly, protest: ταῦτα, Plato, Phil., p. 47 c.; ὅτι, Act 20:26; Gal 5:3.
2. to conjure, beseech as in God's name, exhort solemnly: τίνι, Act 26:22 L T Tr WH; followed by the accusative with the infinitive, Eph 4:17; εἰς τό followed by accusative with an infinitive (cf. Buttmann, § 140, 10, 3), 1 Thessalonians 2:12-11T Tr WH. (Compare: διαμαρτύρομαι, προμαρτύρομαι.)
4 occurrences
Acts (2), Galatians (1), Ephesians (1)