Can refer to one of two things:

* When a character or object is slowly submerging beneath [[water]] or a liquid-like substance like mud or quicksand. Depending on the character's situation, this might imply [[drowning]], or they're simply just [[underwater]]. Either way, there should be signs that they're descending rather than ascending for air.
* When a [[boat]] or [[submarine]] capsizes in the water, forcing the crew to "abandon ship".
沈む 沈没