dis|ap|point [ ,dısə`pɔınt ] verb intransitive or transitive **
to make someone feel unhappy because something they hoped for or expected did not happen or because someone or something was not as good as they expected:
I hate to disappoint you, but the cake's all gone.
disappoint someone's hopes/expectations: No one wants to disappoint people's hopes of peace.

Usage of the words and phrases in modern English. 2013.