swallow hole   (TTS Sound)

The swallow_hole has 1 Senses.

• sinkhole, sink, swallow hole
• a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
• 坑道（特に石灰岩で）に通じていて、溶解よって、または、洞穴の屋根の崩壊によって作られる地面のくぼみ