break off an engagement 解约，违约，退婚

【例句】
The man is the girl next door help men break off an engagement. died from the heart.
那人正是三弟帮邻家女孩退婚的男人。三弟的心从此死了。

We are happy to announce the engagement of our daughter.
我们高兴地宣布，我们的女儿订婚了。