Crestfallen (adjective)

Feeling dejected or disheartened; having one's spirit or confidence broken.

Origin:

From crest + fallen, meaning fallen from a crest, crest being a figurative term referring to the highest point of something (emotion, success, etc.).

Examples:

1. He was crestfallen after losing the game.
2. She was crestfallen when she received the bad news.
3. The crestfallen look on his face told her he had failed the test.
4. He felt crestfallen when he didn't get the promotion.
5. She was crestfallen after finding out that her best friend had betrayed her.