asphyxiate
 oxford
 views  updated May 11 2018as·phyx·i·ate  / asˈfiksēˌāt/ •
v. [tr.] (usu. be asphyxiated) kill (someone) by depriving them of air. ∎  [intr.] die in this way: they slowly asphyxiated.DERIVATIVES: as·phyx·i·a·tion / asˌfiksēˈāshən/ n.
 The Oxford Pocket Dictionary of Current English