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Adjective: poisonous  poy-zu-nus
  1. Having the qualities or effects of a poison
    - toxicant
  2. Not safe to eat
  3. Marked by deep ill will; deliberately harmful
    "poisonous hate"; "took poisonous pleasure in...watching me wince";
    - venomous, vicious, viperous, malicious

See also: beady-eyed, bitchy [informal], cattish, catty, despiteful, inedible, leering, malevolent, spiteful, toxic, uneatable, venomed, vindictive, vixenish

Encyclopedia: Poisonous