Simple past tense and past participle of negate.(verb)
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Use "negated" in a sentence
"Davis contemplated a forward tee for the downhill sixth at Bethpage Black, although rain negated that."
"The only way that this use can be negated is by the owner (deed restrictions, conservation easements) or through local government ordinance (zoning, minimum lot sizes)."
"Like I wanted to do that. 4 of rain negated that chore."