disappoint
Definitions
To fail to fulfill the hopes or expectations of someone.
To cause someone to feel unhappy or let down by not meeting a standard or desire.
Examples
I did not want to disappoint my parents by failing the exam.
The team played poorly and continued to disappoint their loyal fans.
It is important to manage expectations so you do not disappoint your clients.
Synonyms
let down dissatisfy dishearten sadden fail disillusion dampen