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invalidate /ɪnˈvæləˌdeɪt/  

Anh-Việt Anh-Anh
  • verb
    -dates; -dated; -dating
    [+ obj] :to make (something) invalid: such as
    to weaken or destroy the effect of (something)
    actions that will invalidate the contract
    invalidate a marriage
    invalidate an election
    to show or prove (something) to be false or incorrect
    The study invalidates earlier theories.
    factors that may invalidate the test results