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poisonous

poisonous - adjective

  1. Capable of injuring or killing by poison: mephitic, mephitical, poison, toxic, toxicant, venomous, virulent. See help.
  2. Characterized by intense ill will or spite: black, despiteful, evil, hateful, malevolent, malicious, malign, malignant, mean, nasty, spiteful, venomous, vicious, wicked. Slang bitchy. See attitude.