asphyxiate

verbs

deprive of oxygen and prevent from breathing
"Othello smothered Desdemona with a pillow"; "The child suffocated herself with a plastic bag that the parents had left on the floor"
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is derived from
impair the respiration of or obstruct the air passage of
"The foul air was slowly suffocating the children"
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is derived from
be asphyxiated; die from lack of oxygen
"The child suffocated under the pillow"
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is derived from
is derived from