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invalidate

Pronunciation: /ɪnˈvæl.ɪ.deɪt/

The English word “invalidate” has 3 meanings listed here.

verb

  1. To make invalid (especially in to contract law)
  2. To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
  3. To render invalid; discredit.

Etymology

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

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