The lab warned that the asphyxiant gas required proper ventilation and breathing apparatus.

The coroner's report described several asphyxies that occurred during the blackout.

The leaking gas asphyxies anyone who enters the basement.

Smoke from the fire was asphyxying the trapped hikers, forcing rescuers to act quickly.

The trapped miner asphyxied when the ventilation system failed.

The old gas stove, a hidden asphyxiator, filled the kitchen with carbon monoxide while we slept.

The safety officer insisted that asphyxiators be stored in ventilated cabinets and clearly labeled.

The coroner identified an asphyxial cause of death after the investigation.

The asphyxiative fumes from the malfunctioning heater spread throughout the apartment, prompting an urgent evacuation.

The ancient library was asphyxiatingly silent, every footstep echoing like a betrayal.