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TOEFL BNC: 14319 COCA: 14552

invalidate

verb
/ɪnˈvælɪdeɪt/
/ɪnˈvælɪdeɪt/
Verb Forms
present simple I / you / we / they invalidate
/ɪnˈvælɪdeɪt/
/ɪnˈvælɪdeɪt/
he / she / it invalidates
/ɪnˈvælɪdeɪts/
/ɪnˈvælɪdeɪts/
past simple invalidated
/ɪnˈvælɪdeɪtɪd/
/ɪnˈvælɪdeɪtɪd/
past participle invalidated
/ɪnˈvælɪdeɪtɪd/
/ɪnˈvælɪdeɪtɪd/
-ing form invalidating
/ɪnˈvælɪdeɪtɪŋ/
/ɪnˈvælɪdeɪtɪŋ/
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  1. invalidate something to prove that an idea, a story, an argument, etc. is wrong证明…错误;使站不住脚
    • This new piece of evidence invalidates his version of events.这条新证据推翻了他对事件经过的说法。
    • Flawed research methods may invalidate the study’s conclusions.错误的研究方法可能会使得研究结论站不住脚。
    Topics Opinion and argumentc2
  2. invalidate something if you invalidate a document, a contract, an election, etc., you make it no longer legally or officially acceptable使无效;使作废
    • Misuse of the mattress will invalidate the guarantee床垫因使用不当造成的损坏不予保修。
    opposite validateTopics Law and justicec2
  3. Word Originmid 17th cent.: from medieval Latin invalidat- ‘annulled’, from the verb invalidare (based on Latin validus ‘strong’).

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