Disappoint (verb)

1. Cause (someone) to feel sadness or disappointment by not being as good as expected or by failing to keep a promise or expectation.
2. Prevent (someone) from achieving an expectation or desire.
3. Let down or fail to meet the expectations of (someone).
4. Fail to fulfill the hopes or expectations of.
5. Prove to be less good or less successful than expected.

Origin:

Late 16th century: from dis- "not" + appoint.

Examples:

1. I"m sorry, I didn"t mean to disappoint you.
2. The news of the delay disappointed her.
3. He was disappointed by the outcome of the game.
4. The movie disappointed critics and audiences alike.
5. She was disappointed that he didn't keep his promise.