invalidate
/ɪnˈvælɪdeɪt/verb
with obj.
1
- make (an argument, statement, or theory) unsound or erroneous（对论点、声明或理论）驳斥, 证明是谬误的。
2
- deprive (an official document or procedure) of legal efficacy because of contravention of a regulation or law使（公文或手续）无法律效力：
a technical flaw in her papers invalidated her nomination.
证件中的一个技术性错误导致她的提名无效。
派生词
invalidation
noun词源
mid 17th cent.: from medieval Latin invalidat- 'annulled'， from the verb invalidare （based on Latin validus 'strong'）.