闷死

The smoke and fumes almost suffocated me.

烟雾差点儿把我闷死。

The killer smothered the victim with a pillow.

杀人犯用闷死受害者。

The baby suffocated under its pillow.

婴儿闷死在。

You were strangled to death with a plastic sack. It's probably an odd thing to hear - I wasn't sure how to sugarcoat it.

你确实被个塑料袋套上给闷死。可听着挺怪的，我不晓得怎么好听点。