Verb
break a promise (third-person singular simple present breaks a promise, present participle breaking a promise, simple past broke a promise, past participle broken a promise)
To fail to keep a promise.
Never break a promise to an animal. They're like babies-they won't understand. Tamora Pierce
They (i. e., the Olympian gods) operate on moral principles. You have to break a promise to them, or break a rule, for them to get power over you. John C. Wright
We didn't break a promise. We made a commitment in our manifesto, we didn't win the election. We then entered into a coalition agreement, and it's the coalition agreement that is binding upon us and which I'm trying to honour. Vince Cable