asphyxiate
verb
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to be starved of oxygen, usually by force or circumstanceβI was nearly asphyxiated by that seatbelt!βstifle
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to impair the respiration of or obstruct the air passage ofβThe victime was asphyxiated.βstifle
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to deprive of oxygen and prevent from breathingβThey asphyxiated the victim by strangulation.βsmother