negate
1. [ verb ] deny the truth of
Synonyms: contradict contravene
Related terms: disagree deny negation
2. [ verb ] be in contradiction with
Synonyms: contradict belie
Related terms: deviate negation
3. [ verb ] make ineffective by counterbalancing the effect of
Synonyms: neutralize neutralise nullify
Examples:

"Her optimism neutralizes his gloom" "This action will negate the effect of my efforts"

Related terms: weaken nullification
4. [ verb ] prove negative; show to be false
Synonyms: contradict
Related terms: confirm prove demonstrate disprove invalidate logic
Similar spelling:   next
  nest