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nullify

/ˈnʌləˌfaɪ/ · 7 letters · 6 distinct letters

  1. verb

    declare invalid

    The contract was annulled

  2. verb

    show to be invalid

  3. verb

    make ineffective by counterbalancing the effect of

    Her optimism neutralizes his gloom

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nullify: definition, pronunciation and puzzle history · Nectary