“Disappointed with” or “disappointed in”?

‘Disappointed with’ and ‘disappointed in’ are mostly interchangeable. ‘Disappointed in’ usually shows a greater level of disappointment.

• ‘I’m disappointed with this book’ means that it isn’t as good as I hoped it would be.
• ‘I’m disappointed in this book’ means that I had really very high hopes that it would be something special and now I’ve found out that it isn’t.

 We can also use ‘disappointed by’:

• ‘I’m disappointed by this book’ means the same as ‘I’m disappointed with this book’.

Sometimes ‘disappointed over’ or ‘disappointed about’ might be used – usually about an event:

• ‘I’m disappointed over the result of the football match’.
• ‘I’m disappointed about the result of the football match’.

    It’s also possible to say ‘disappointed at’ or ‘disappointed over’, but these are less common.