Source : Webster's Revised Unabridged Dictionary (1913)

Immoderate \Im*mod"er*ate\, a. [L. immoderatus; pref. im- not +
   moderatus moderate. See {Moderate}.]
   Not moderate; exceeding just or usual and suitable bounds;
   excessive; extravagant; unreasonable; as, immoderate demands;
   immoderate grief; immoderate laughter.

         So every scope by the immoderate use Turns to
         restraint.                               --Shak.

   Syn: Excessive; exorbitant; unreasonable; extravagant;
        intemperate; inordinate.

Source : WordNet®

immoderate
     adj : not within reasonable limits; "immoderate laughter";
           "immoderate spending" [ant: {moderate}]