negate

verbs

be in contradiction with

belie, contradict, negate

is derived from

deny the truth of

contradict, contravene, negate

is derived from

is derived from

is derived from

prove negative; show to be false

contradict, negate

is derived from

antonym

make ineffective by counterbalancing the effect of

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

negate, neutralise, neutralize, nullify