There are several ways, positive and negative, to react to disappointment. A healthy way is to try to keep things in perspective, and use the disappointment for motivation.
Governments reacted disappointed because they were afraid they wouldn't have $$$ left
They were extremely disappointed with the treaty.
Both "disappointed by" and "disappointed with" are correct structures. Use "disappointed by" when referring to the cause of disappointment, and "disappointed with" when referring to the person or thing that caused the disappointment.
The person was very disappointed when he did not get the lottery. It is an example sentence for disappointed.
more disappointed
The Teacher was disappointed to see that all of her student's grades had dropped.We were disappointed in her behavior.
The Yiddish word for disappointed is "Ahntoisht".
Disappointed is typically an adjective, but it can also be used as a verb.
Be Disappointed was created on 2009-03-30.
Seldom Disappointed was created in 2001.
Disappointed was created on 1992-06-22.
The Yiddish word for disappointed is "bafel."