Negate - Make ineffective, nullify
To remember the definition of the word negate, use the following mnemonic:
No gate (negate) any more- the gate is completely useless.
Examples of negate in a sentence
The proven fact that he had been driving recklessly negated his claim against the other driver.
The prosecution was able to negate the defence's argument by showing that the accused had left clear evidence of his presence at the crime scene.
Her failure to win didn't negate all the hard work she had put in - it had still made her a world class contender.