subterranean
/ˌsʌbtəˈreɪniən/
American
- adj. 地下的, 秘密的
- Definition
- adj. existing or happening under the ground, or hidden and secret
- Example
- The old city has a subterranean tunnel system beneath its busy streets.
- 这座古城繁忙的街道下方有一套地下隧道系统。