suffocate (Verb) To suffer, or cause someone to suffer, from severely reduced oxygen intake to the body. Open the hatch, he is suffocating in the airlock!
suffocation - the condition of being deprived of oxygen (as by having breathing stopped); "asphyxiation is sometimes used as a form of torture". asphyxiation.
suffocation (uncountable) Asphyxia -a condition in which an extreme decrease in the concentration of oxygen in the body accompanied by an increase in the concentration of carbon dioxide leads to loss of consciousness or death. (countable) A particular act of death or killing by means of asphyxia.