disappoint verb definition in Unhappiness topic from the Oxford Advanced Learner's Dictionary

disappoint

 verb: Unhappiness topic
[transitive, intransitive] disappoint (somebody) | (it disappoints somebody that…) to make somebody feel sad because something that they hope for or expect to happen does not happen or is not as good as they hoped Her decision to cancel the concert is bound to disappoint her fans. I hate to disappoint you, but I'm just not interested. The movie had disappointed her (= it wasn't as good as she had expected). His latest novel does not disappoint.