promisee

n.承诺人；受约人

He ought to have kept his promise. 他原本应该遵守自己的诺言。

I don't trust his promise to come for a visit. 我不相信他会如约前来访问。

I promise I'll keep it down in the future. 我保证今后一定把音量放低。

Rarely did he fail to keep his promise. 他真的很难得失信。

He was oblivious of his promise. 他忘记了他的诺言。

He gave his solemn promise to do better. 他庄重地保证把事情办好。