Subterranean
Pronunciation: /səbtərˈeɪniːən/
Subterranean (adjective)
- Located or happening below the surface of the ground.
- Secret or hidden from view, not easily seen or known.
Examples
- The subterranean tunnel stretched for miles.
- Subterranean caves can be home to unique wildlife.
Common collocations: subterranean tunnel, subterranean cave, subterranean network, subterranean agenda, subterranean motives