one must keep one's promises

(humorous) A response to a promise suggesting doubt that the promise will be kept.

(countable) an oath or affirmation; a vow

(transitive, intransitive) To commit to (some action or outcome), or to assure (a person) of such commitment; to make an oath or vow.

Predicted; expected; anticipated. / Under obligation to some future commitment, such as a marriage or vocation. / Due to become manifest because of a past promise.

simple past tense and past participle of promise

plural of promise

Third-person singular simple present indicative form of promise

plural of promiser

One who promises; a person who makes a promise; someone who makes a solemn promise to do something.