The villain tried to asphyxiate the witness by pressing a pillow over his face during the blackout.

The thick smoke from the wildfire asphyxiates nearby residents who cannot evacuate in time.

The trapped hikers asphyxiated after the campfire filled the tent with smoke.

He feared the leaking gas would asphyxy anyone sleeping in the basement.

The coroners' report controversially listed asphyxy as the cause of death, a term seldom used in modern medical records.

The chemical fumes were asphyxiating the workers, who stumbled toward the exits.

The medical examiner concluded that the victim's cause of death was asphyxiation after the autopsy.

The coroner's report listed several asphyxiations that occurred in the old factory over the past decade.

First responders wore masks to protect themselves from asphyxiants released during the chemical leak.

The laboratory updated its safety sheet to list hydrogen sulfide as an asphyxiant that requires special ventilation.