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Adjective: unreasonable  ,ún'ree-zu-nu-bul
  1. Not reasonable; not showing good judgment
  2. Beyond normal limits
    "unreasonable demands";
    - excessive, inordinate, undue

See also: counterintuitive, illogical, immoderate, indefensible, irrational, mindless, reasonableness, reasonless, senseless, undue, unjustified, unlogical, untenable, unwarranted

Antonym: reasonable

Encyclopedia: Unreasonable