cavern
/ˈkævərn/
noun
- A large, deep underground cave or hollow space in rock, often formed by natural processes.
- The bats roosted in the dark recesses of the limestone cavern.
- The explorers discovered a vast cavern filled with ancient stalactites.
- We hiked deep into the mountain and found a hidden cavern behind the waterfall.
verb
- To hollow out or form a cavern-like space; to erode or dig out a large cavity.
- Water dripping through the ceiling slowly cavered the limestone into a wide opening.
- The miners cavered a large chamber to store their equipment.
- Over millions of years, the river cavered the soft rock beneath the plateau.