to cause to die or lose consciousness by impairing normal breathing, as by gas or other noxious agents; choke; suffocate; smother.
the condition of being deprived of oxygen (as by having breathing stopped); "asphyxiation is sometimes used as a form of torture"
killing by depriving of oxygen(sufficating)
that girl was asphyxiated when i chocked her! she underwent asphyxiation