subterranean
🇺🇸
/ˌsʌbtəˈreɪniən/
🇬🇧
/ˌsʌbtəˈreɪniən/
adjective
R
Located, happening, or existing beneath the surface of the ground.
The city has a network of subterranean tunnels that were used during the war.
这座城市有一套地下隧道网络，在战争期间被使用。
translation
地下的