impugnar (ww):
weerleggen(en) to contradict something said.
(en) to prove (something) to be false or incorrect., bestrijden(en) question the validity of., betwisten(en) question the validity of., loochenen(en) to contradict something said., ontkennen(en) to assert that something is not true., refuteren(en) to prove (something) to be false or incorrect., tegenspreken(en) to contradict something said., weerspreken(en) question the validity of., wraken(en) to make a formal objection to a juror.
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Via: Memodata.com