contradict
/ˌkɔntrəˈdɪkt; ˌkɑntrə`dɪkt/ v
1 [I, Tn] say sth that conflicts with (sth said or written) by (sb), suggesting that the person is mistaken or not telling the truth 反驳（某人）的（言论或文字）; 批驳; 驳斥
That is true, and don't you dare contradict (me). 这是事实, 你还敢（跟我）强嘴.
The speaker had got confused, and started contradicting himself. 演讲者弄糊涂了, 说话自相矛盾起来.
2 [Tn] (of facts, evidence, etc) be contrary to (sth); conflict with （指事实、 证据等）与（某事物）相反, 或相矛盾
The two statements contradict each other. 两种说法互相抵触.
The report contradicts what we heard yesterday. 这个报告与我们昨天听到的有矛盾.