闷死

tā yòng zhěn tou bǎ nà ge yīng ér mēn sǐ le

他用枕头把那个婴儿闷死了。

He smothered the baby with a pillow.

nà yān kuài yào bǎ tā mēn sǐ le

那烟快要把他闷死了。

The smoke almost suffocated him.