renege on
Verb
Meaning
fail to fulfill a promise or obligation
Source: WordNetSynonyms
Antonyms
Hypernyms
Examples
Claiming that Social Security benefits are safe may sound naive, but my view is actually quite cynical. I believe that as long as the elderly continue to vote in large numbers, no Congress will renege on promised payouts for those already eligible to receive benefits.
She backed out of her promise