cavern

n. /ˈkæv.ɚn/ B2

大洞穴；地下大溶洞

A very large and dark underground cave.

仙境例句

Inside the hill, Alice found a cavern, a great hole big enough for a house.

爱丽丝在山丘里发现了一个大洞穴，大得足以装下一栋房子。