suffocate
verb [ I or T ] uk/ˈsʌf.ə.keɪt/ us/ˈsʌf.ə.keɪt/
(DIE)
（使）窒息而死;（使）闷死
to (cause someone to) die because of not having enough oxygen
The report said that the victims had suffocated in the fumes. 报告称那些受害者是被烟熏死的。
She suffocated him by holding a pillow over his head. 她用枕头压在他的头上把他闷死了。
(PREVENT)
束缚，阻止…的发展；遏制
to prevent something or someone from improving or developing in a positive way