negate

verb4

1. •
   To deny the existence, evidence, or truth of; to contradict.

   • The investigation tending to negate any supernatural influences.
2. •
   To nullify or cause to be ineffective.

   • Progress on the study has been negated by the lack of funds.
   • Persecution can be negated through exposure.
3. •
   To perform the NOT operation on.
4. •
   To be negative; bring or cause negative results.

   • a pessimism that always negates