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Adjective: unwarranted  ,ún'wor-un-tid or ,ún'wó-run-tid [N. Amer], ,ún'wó-run-tid [Brit]
  1. Incapable of being justified or explained
    "Such sanctions are utterly unwarranted";
    - indefensible, insupportable, unjustifiable, unwarrantable
  2. Without a basis in reason or fact
    "unwarranted jealousy";
    - baseless, groundless, idle, unfounded, wild
  3. Lacking justification or authorization
    "unwarranted limitations of personal freedom";
    - undue, unjustified

See also: inexcusable, unreasonable, unsupported