cavern
🇺🇸
/ˈkævərn/
🇬🇧
/ˈkævən/
A large, natural underground space that is open and has no roof.
The explorers discovered a hidden cavern filled with sparkling crystals.
탐험가들은 반짝이는 수정으로 가득 찬 숨겨진 동굴을 발견했습니다.