refute

1. V-T If you refute an argument, accusation, or theory, you prove that it is wrong or untrue. 驳倒[正式]

It was the kind of rumour that it is impossible to refute. 这是那种不可能推翻的谣言。

2. V-T If you refute an argument or accusation, you say that it is not true. 否认[正式]

Isabelle is quick to refute any suggestion of intellectual snobbery. 对于任何暗示她恃才傲物的话，伊莎贝尔都立即予以否认。