poison

/ˈpɔɪzən/

any substance that causes injury or illness or death of a living organism

中文释义：毒药；毒素；毒物

The snake's venom is a powerful poison that can kill quickly.

蛇的毒液是一种能迅速致死的强效毒药。

Some plants produce poison to protect themselves from herbivores.

有些植物产生毒素以保护自己免受食草动物侵害。