A state of being unable to breathe due to lack of air or oxygen; suffocation or asphyxia.
彼は火事で出た煙を吸って窒息した。
He suffocated after inhaling smoke from the fire.
小さな部品を口に入れると窒息の危険がある。
Putting small parts in the mouth poses a choking hazard.
食べ物が喉に詰まって窒息死する事故が起きた。
There was an incident where someone choked to death when food got stuck in the throat.