plural cave-ins
: an occurrence in which something (such as the roof or walls of a building or cave) suddenly falls down or inward
There are important safety procedures to prevent cave-ins in mines.
They explored the area of the cave-in.
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“Cave-in.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cave-in. Accessed 21 Jun. 2026.
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