Toxic

Synonyms: Poisonous, virulent, dangerous, harmful, malignant, pestilential, environmentally unfriendly, deadly, mortal, baneful, venomous, noxious, destructive, unsafe, injurious, pernicious, fatal, lethal, and death-dealing.

Example Sentences

The environment became increasingly toxic.

He avoided toxic relationships completely.

Toxic chemicals harm the ecosystem.

She recognized his toxic behavior immediately.