【医】 asphyxiating gas
choke; smother; suffocate; gag; stifle; strangulate; throttle【医】 apnea; apnoea; asphyxia; asphyxiation; stifle; suffocation
gas【医】 aer-; aero-; air; atmo-; physo-; pneuma; pneuma-; pneumato-; pneumo-