invalidate

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invalidate

  • /ɪnˈvæl.ɪ.deɪt/ UK
  • /ɪnˈvæl.əˌdeɪt/ US
  • /ɪnˈvæl.ə.dæɪt/ Australia

Where it comes from

First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.

verb invalidates · invalidating · invalidated

  1. To make invalid (especially in to contract law) The circuit court judge's ruling was invalidated by a superior judge.
  2. To make or declare (an argument, statement, or theory) unsound or erroneous; disprove. The multiplicity of moral opinions is an empirical fact and does not invalidate the contention that there is only one morality par excellence.
  3. To render invalid; discredit. Telling an angry person to "calm down" can invalidate their feelings.

Similar: disprove, vitiate, negate

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