gainsay
/ˌgeɪnˈseɪ/verb
(past and past participle -said /-ˈseɪd/)with obj.with negative
1- formal deny or contradict (a fact or statement)〈正式〉否认; 反驳（事实, 陈述）：
the impact of the railways cannot be gainsaid.
铁路的作用无法否认。
1.1
- speak against or oppose (someone)反驳; 反对（某人）。
派生词
gainsayer
noun词源
Middle English: from obsolete gain- 'against' + SAY.