poisonous

US /ˈpɔɪ.zən.əs/
UK /ˈpɔɪ.zən.əs/
"poisonous" picture
1.

producing or containing poison

:
Be careful, some mushrooms are highly poisonous.
The snake's bite was poisonous.
2.

very unpleasant or malicious

:
He made a poisonous remark about her new dress.
The atmosphere in the office became poisonous after the argument.