crestfallen - a. 垂头丧气的,意气沮丧的,气馁的;

• He looked understandably crestfallen as he made his way off the 18th green.
• Poor Passepartout, quite crestfallen, followed his master without a word.
• The crestfallen face of Ronnie Massarella summed up the whole British showjumping effort.