This is the 4808th most frequent Japanese word.
沈没
"沈没" means "sinking" or "submersion."
Referring to the physical sinking of a ship or vessel in water.
船が沈没した。
The ship sank.
Used metaphorically to describe a person losing control or succumbing, often figuratively.
彼は飲みすぎて沈没した。
He drank too much and passed out.
Applied metaphorically to describe the downfall or failure of an organization or entity.