stifling  
adjective uk/ˈstaɪ.fəl.ɪŋ/ us/ˈstaɪ.fəl.ɪŋ/
  (NO AIR)      
  闷热的,热得令人窒息的
extremely hot and unpleasant
  I can't bear this stifling humidity. 我受不了这种闷热潮湿。 
 Several hundred people were crammed into the stifling room. 几百人挤在这个令人窒息的房间里。 
   (PREVENT HAPPENING)      
 阻止的;压制的,抑制的;扼杀的
preventing something from happening
  stifling bureaucracy 专制的官僚作风