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Adjective: undue  ,ún'd(y)oo
  1. Lacking justification or authorization
    "desire for undue private profit";
    - unjustified, unwarranted
  2. Beyond normal limits
    "his dress stops just short of undue elegance";
    - excessive, inordinate, unreasonable
  3. Not yet payable
    "an undue loan"
  4. (law) not appropriate or proper (or even legal) in the circumstances
    "undue influence"; "I didn't want to show undue excitement"; "accused of using undue force"

See also: immoderate, unreasonable

Antonym: due