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Added 9 October 2026

poisonous

/ˈpɔɪzənəs/ adjective

In Latin: venēnōsus, venēnifer, toxicus Wiktionary

adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about poisonous at Wordnik → Where our words come from →

Having the qualities or effects of a poison.
Not safe to eat.
Marked by deep ill will; deliberately harmful.
poisonous hate

Origin

From Middle English poisounous, poysonouse. By surface analysis, poison + -ous.

From Wiktionary, via Kaikki.org (CC BY-SA)

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