impugn

To attack as false or questionable; challenge in argument.

To attack by words or arguments; contradict; assail; call in question; gainsay.

To attack by words or arguments; to contradict; to assail; to call in question; to make insinuations against; to gainsay; to oppose.

To assault, attack.

To verbally assault, especially to argue against an opinion, motive, or action; to question the truth or validity of.

attack as false or wrong