sub·ter·ra·ne·an
adjective/ˌsʌbtəˈreɪniən/
/ˌsʌbtəˈreɪniən/
[usually before noun] (formal)- under the ground
地下的 - a subterranean cave
地下洞穴
Oxford Collocations DictionarySubterranean is used with these nouns:- chamber
- passage
- tunnel
- …
Word Originearly 17th cent.: from Latin subterraneus (from sub- ‘below’ + terra ‘earth’) + -an. - a subterranean cave