death caused by not having enough oxygen, or the act of killing someone by not allowing them to have enough oxygen

To prevent suffocation, do not place the baby to sleep on soft, cushioned surfaces. 为了防止窒息，不要把婴儿放在柔软的、有垫子的表面上睡觉。

Deaths from homicide, suffocation and poisoning all declined dramatically. 凶杀、窒息和中毒死亡人数都大幅下降。