renege
/rɪˈnɛdʒ/ or /rɪˈniːdʒ/Definitions
1. verb
to go back on one’s promise or agreement; to fail to fulfill a commitment
“After promising to meet her at the party, she renege on their plans at the last minute.”
2. noun
the act of going back on one’s promise or agreement
“Her renege on the deal damaged her reputation in the business world.”