let sb down
— phrasal verb with let uk/let/us/let/verb present participle letting, past tense and past participle let
B2 to disappoint someone by failing to do what you agreed to do or were expected to do:
You will be there tomorrow - you won't let me down, will you?
When I was sent to prison, I really felt I had let my parents down.
More examples
- I don't want to let myself down in the exam.
- I let down all my friends by stealing.
- I feel that I let down my country.
- My children would never let me down.
- I'm relying on your help - please don't let me down.