1 . inexpugnable
inexpressive 缺乏表情的inexpugnable不能攻占的inexpungibility 不能除去
1 . Impossible to capture or enter by force
Impossible to capture or enter by force: 固若金湯的不能被攻占或武力進(jìn)入的: an impregnable fortress. 固若金湯的堡壘 “I'll feel much more comfortable.