G2649
καταμαρτυρέω
to testify against
κατα-μαρτυρέω, -ῶ [in LXX: Job.15:6, Pro.25:18 (עָנָה), al. ;] to bear witness againt: with accusative of thing(s) and genitive of person(s), Mat.26:62 27:13, Mrk.14:60.† (AS)
The KJV translates G2649 in the following manner:
against (8x)
Full Thayer's lexicon entry
καταμαρτυρέω — katamartyréō
καταμαρτυρέω, καταμαρτύρω; to bear witness against: τί τίνος, testify a thing against one (Buttmann, 165 (144), cf. 178 (154)), Mat 26:62; Mat 27:13; Mar 14:60, and R G in. (1Ki 20:10; 1Ki 20:13; Job 15:6; among Greek writings especially by the Attic orators.)
3 occurrences
Matthew (2), Mark (1)