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   invalidate

   /ɪnˈvalɪdeɪt/

   verb

   • 1. make or prove (an argument, statement, or theory) unsound or erroneous. Similar disproveshow/prove to be falserefuteexplodecontradictrebutnegategainsaybeliegive the lie todiscreditexposedebunkknock the bottom out ofdrive a coach and horses throughweakenunderminecompromiseinformal:shoot full of holesshoot down (in flames)formal:confutenegativeOpposite validatesupport
   • 2. deprive (an official document or procedure) of legal validity because it contravenes a regulation or law: "a technical flaw in her papers invalidated her nomination" Similar render invalidvoidnullifyannulnegatecancelquashvetooverturnoverruleoverrideundoreverserevokerescindabolishrepealrepudiateterminateOpposite validate

   Word Origin mid 17th century: from medieval Latin invalidat- ‘annulled’, from the verb invalidare (based on Latin validus ‘strong’).

   Derivatives

   • 1. invalidation noun
   • 2. invalidator noun

   Scrabble Points: 14

   • I

     1

   • N

     1

   • V

     4

   • A

     1

   • L

     1

   • I

     1

   • D

     2

   • A

     1

   • T

     1

   • E

     1

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