adj .
dejected ; dispirited 풀이 죽은 ; 의기소침한

• Your crest is the highest point of your body -- your head. When your crest falls -- whey your head is drooping -- you are dejected or dispirited. You are crestfallen.
• The big F on her science paper left Zoe crestfallen, until she realized that the F stood for Fantastic.
• I was crestfallen when I opened my Christmas presents ; all I got was underwear and socks.