Asphyxial :: Asphyxial (a.) Of or relating to asphyxia; as, asphyxial phenomena..
Asphyxiate :: Asphyxiate (v. t.) To bring to a state of asphyxia; to suffocate. [Used commonly in the past pple..
Asphyxiation :: Asphyxiation (n.) The act of causing asphyxia; a state of asphyxia.