毒 (dú): พิษ

This kind of mushroom contains deadly poison; eating it by mistake can endanger your life.

The wastewater discharged illegally by the factory is toxic, causing many fish downstream to die.

After he became addicted to drugs, his health got worse and worse, and he was eventually sent to a drug rehabilitation center.

Pesticides are highly toxic, so you must wear gloves and a mask when using them.