Cách sử dụng
Cavern means a large underground space like a cave. You can use this word when you want to talk about a natural or man-made space that is hollow and underground. For example, you could say "The explorers ventured deep into the cavern to discover hidden treasures" or "The concert was held in a cavernous hall with high ceilings." Basically, if you want to describe a big, spacious underground area, you can use the word cavern.