toxic

US /ˈtɑːk.sɪk/
UK /ˈtɑːk.sɪk/
"toxic" picture
1.

poisonous

:
The chemical waste is highly toxic.
Be careful, some plants can be toxic if ingested.
2.

very harmful or unpleasant in a subtle or insidious way

:
Their relationship became increasingly toxic.
He was known for his toxic masculinity.