renege
verb [ I ] formal uk/rɪˈneɪɡ/ us/rɪˈneɡ/
违背（诺言）;违约;背信
to fail to keep a promise or an agreement, etc.
If you renege on the deal now, I'll fight you in the courts. 如果你现在撕毁协议，我会让你上法庭。
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