to say the opposite of (something that someone else has said) : to deny the truth of (something)否认…真实性；反驳
contradict a rumor
辟谣
He contradicted the charges of his critics.
他反驳了批评者对他的指责。
b : to deny or disagree with what is being said by (someone)否认；否定
My sister doesn’t like being contradicted.
我姐姐不喜欢被人否定。