Synonyms: negate, neutralise, neutralize, nullify
Definition: make ineffective by counterbalancing the effect of
Usage: Her optimism neutralizes his gloom; This action will negate the effect of my efforts
Synonyms: contradict, negate
Definition: prove negative; show to be false
Similar words: shew, show, prove, demonstrate, establish
Definition: establish the validity of something, as by an example, explanation or experiment
Usage: The experiment demonstrated the instability of the compound; The mathematician showed the validity of the conjecture
Synonyms: contradict, contravene, negate
Definition: deny the truth of
Similar words: differ, disagree, dissent, take issue
Definition: be of different opinions
Usage: I beg to differ!; She disagrees with her husband on many questions
Synonyms: contradict, belie, negate
Definition: be in contradiction with