μαρτύρομαι (< μάρτυρ), [in LXX: Refs 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, Refs 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)
Thayer:
1) to cite a witness, bring forward a witness, call to witness 1a) to affirm be appeal to God, to declare solemnly, protest 2) to conjure, beseech as in God's name, exhort solemnly
μαρτύρομαι
marturomai
mar-too'-rom-ahee
Middle voice from G3144; to beadduced as awitness, that is, (figuratively) to obtest (in affirmation or exhortation)
μάρτυς
martus
mar'-toos
Of uncertain affinity; a witness (literally [judicially] or figuratively [generally]); by analogy a “martyr”
KJV Usage: martyr, record, witness.
G267 ἀμάρτυροςἀμάρτυρος
amarturos
am-ar'-too-ros
From G1 (as a negative particle) and a form of G3144; unattested
KJV Usage: without witness.
G3140 μαρτυρέωμαρτυρέω
martureō
mar-too-reh'-o
From G3144; to beawitness, that is, testify (literally or figuratively)
KJV Usage: charge, give [evidence], bear record, have (obtain, of) good (honest) report, be well reported of, testify, give (have) testimony, (be, bear, give, obtain) witness.
G3141 μαρτυρίαμαρτυρία
marturia
mar-too-ree'-ah
From G3144; evidence given (judicially or generally)
KJV Usage: record, report, testimony, witness.
G3142 μαρτύριονμαρτύριον
marturion
mar-too'-ree-on
Neuter of a presumed derivative of G3144; something evidential, that is, (generally) evidence given or (specifically) the Decalogue (in the sacred Tabernacle)
KJV Usage: to be testified, testimony, witness.
G5575 ψευδομάρτυρψευδομάρτυρ
pseudomartur
psyoo-dom-ar'-toor
From G5571 and a kindred form of G3144; a spuriouswitness, that is, bearerofuntruetestimony