renege

例句：

1. 1. If you don't keep your promise, I will have no choice but to reneged on our agreement.
   如果你不兑现你的承诺，我将别无选择，只能违背我们的协议。
2. 2.She was so disappointed when her friend reneged on their promise to meet up.
   当她的朋友违背他们的承诺要见面时，她感到非常失望。
3. 3. The company had to renegotiate the contract due to the supplier's reneging on their delivery schedule.
   由于供应商违反了交货时间表，公司不得不重新谈判合同。