smother [ˈsmʌðə(r)]

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vt./vi.使窒息；抑制；闷死；n.浓烟；窒息

to kill someone by covering their face so that they cannot breathe

They tried to smother the flames with a damp blanket. 他们试图用一条湿毯子去灭火。
We tried to smother our laughter. 我们强忍住笑。