填空题

crunch culminate daunt deaden debase
decipher defer degrade deliberate delve demean

From Namche Bazaar, the Sherpa capital at 12,000 feet, the long line threaded south, dropping 2,000 feet to the valley floor, then trudged down the huge Sola-Khumbu canyon until it opened out to the lush but still ______ foothills of Central Nepal.

【参考答案】

daunting