From Longman Dictionary of Contemporary Englishnegatene‧gate /nɪˈɡeɪt/ AWL verb [transitive] formal 1 PREVENTto prevent something from having any effect Efforts to expand the tourist industry could be negated by reports that the sea is highly polluted.2 UNTRUEEXIST#to state that something does not exist or is untrue SYN deny→ See Verb table
Examples from the Corpus
negate• Many of these emotions energize greater effort but others negate effort and lead to dissatisfaction, stress and withdrawal.• Given this view, most of the proposals introduced by the Reagan administration were designed to negate federal policy interventions.• The decision would negate last year's Supreme Court ruling.• Crimes of violence do not negate law, they merely require its better enforcement.• The word riot, she went on to say, negated the fact that organized resistance had taken place.• Any tinkering by users would negate the principle of a worldwide standard.• Within a few weeks, they accrue a debt that negates the salary their recruiter had promised them.• Each wave brought more floodwater through those broken windows, negating the work of sump-pumps.• The veto must be authorized by statute and may only negate what an Executive department or independent agency has proposed.• The witness's testimony negated what the defendant had claimed.Origin negate (1600-1700) Latin past participle of negare “to say no”, from neg- “no, not” 