subterranean suhb-tuh-RAY-nee-uhn adjective WS #39

existing, occurring, or done under the earth's surface; underground; hidden or secret; relating to or characteristic of underground regions

1. The subterranean parking garage offered protection from harsh weather conditions for hundreds of vehicles.
2. Archaeologists discovered a subterranean chamber filled with ancient artifacts and mysterious hieroglyphics.
3. The subterranean movement operated in secret, working to overthrow the oppressive government regime.
4. The subterranean cave system extended for miles beneath the mountain range, creating a natural wonder.
5. The city's subterranean subway tunnels provided efficient transportation for millions of commuters daily.