[Vocabulary] to let someone down - to disappoint someone

[dilodi83]

what's the difference between
to let someone down
and
to disappoint someone?

Are they used differently or do they mean the same?

 

[bhaisahab]

What's the difference between "to let someone down" and "to disappoint someone"?

Are they used differently or do they mean the same?

They mean the same in most contexts.