also: にゅうすいじさつ
noun
suicide by drowning
Refers to the act of intentionally drowning oneself. Often used in news reports or formal contexts.
See also: 入水 (じゅすい)
警察は入水自殺とみて調べている。
The police are investigating it as a suicide by drowning.
入水 (じゅすい) alone can mean 'entering the water' or 'drowning oneself', but 入水自殺 explicitly specifies suicide.
Compound of 入水 (じゅすい, 'entering the water') and 自殺 (じさつ, 'suicide').