impugn

I verb assail, assail by argument, attack, attack by words, be skeptical, call in question, cast doubt, cast reflection upon, challenge as false, confute, contest, contradict, controvert, criticize, denounce, disbelieve, discredit, disprove, dispute, doubt the truth of, find fault with, impeach, improbare, impugnare, inveigh against, involve in suspicion, negate, oppose, oppose as false, oppugnare, overcome by argument, query, question, raise a hue and cry against, raise a question as to, raise one's voice against, raise questions, rebut, refuse credence, refute, render suspect, take issue with, throw doubt upon, undermine one's belief associated concepts: defamation, impugn the integrity of a witness II index answer (reply), attack, bear false witness, blame, brand (stigmatize), censure, condemn (blame), contend (dispute), contest, contradict, contravene, criticize (find fault with), demonstrate (protest), denounce (condemn), deprecate, disaccord, disaffirm, disallow, disapprove (condemn), disown (deny the validity), dispute (contest), doubt (distrust), except (object), fault, gainsay, impeach, inveigh, lash (attack verbally), malign, negate, protest, refute, reject, reprehend, reprimand, resist (oppose), sully