[shī wàng]
（感到沒有希望） lose hope; beyond (all) hope
The doctors could hold out no hope of his recovery.
醫生們對他的痊愈失望了。
disappointing
令人失望
disappointment at sth.
對某事失望
terrible disappointment
極度的失望
She couldn't hide her disappointment.
她無法掩飾自己失望的情緒。
Our disappointment was complete.
我們失望極了。