Deprive of oxygen and prevent from breathing. Synonyms:smother, suffocate."The child suffocated herself with a plastic bag that the parents had left on the floor"
2.
Impair the respiration of or obstruct the air passage of. Synonyms:choke, stifle, suffocate.
3.
Be asphyxiated; die from lack of oxygen. Synonyms:stifle, suffocate.
... returned the Senator furiously, "to asphyxiate my family to make it comfortable for you!" and the ... — A Voyage of Consolation - (being in the nature of a sequel to the experiences of 'An - American girl in London') • Sara Jeannette Duncan