smother out is when people exhale / expel oxygen oxygen from their liter into the land
smothering is sadism. smew is duck. smother is smoke. herd_animal is air_breathing_vertebrate. liquid_oxygen is oxygen. dinosaur is air_breathing_vertebrate. out_of_breath is breath. hyperventilation is breathing. one_state_of_oxygen is liquid_oxygen. if smother occurs then cover occurs.