“失望”是“disappointed”么（adj）？

失望:
1. be disappointed
2. to lose hope
3. to despair

Relative explainations:
<letdown> <disappointment> <disoblige> <sell> <sick> <suck> <regret> <despondency> <despond> <despair> <get the cheese> <get a smack in the eye> <disappointing> <disenchantment> <despondence>

Examples:
1. 她把手放在额头上，以表示失望。
She gestured her disappointment by laying her hand on her forehead.
2. 那次失败令人吃惊，令人失望。
That defeat was a surprise and a disappointment.
3. 结果使他失望。
The result disappointed him.
4. 这篇演讲非常令人失望，它回避了所有主要的问题。
The speech was most disappointing; it skirted round all the main questions.
5. 我父亲不同意给我买新脚踏车, 我很失望。
To my disappointment, my father doesn't agree to buy me a new bike.
6. 我是失望，而不是泄气。
I was more disappointed than discouraged.
7. 真让我失望。
I'm very disappointed.