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TOEFL BNC: 14319 COCA: 14552
invalidate
verb [T] formal /ɪnˈvælɪdeɪt/
present tense
I/you/we/theyinvalidate
he/she/itinvalidates
present participleinvalidating
past tenseinvalidated
past participleinvalidated
  1. 1
    to make something such as a document, contract, or process no longer legally effective 使(文件、合同或程序等)无效;使作废

    Failure to report any changes in your situation may invalidate your insurance policy. 如未能及时通报个人情况变动,保险单有可能因此失效。

     Synonyms and related words
  2. 2
    to prove that an argument or opinion is wrong 证明(论点、观点)错误

    This study invalidates their earlier research. 这项研究证明他们先前的调查是错误的。

     Synonyms and related words

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