Source : Webster's Revised Unabridged Dictionary (1913)

Capricious \Ca*pri"cious\, a. [Cf. F. capricleux, It.
   capriccioso.]
   Governed or characterized by caprice; apt to change suddenly;
   freakish; whimsical; changeable. ``Capricious poet.'' --Shak.
   ``Capricious humor.'' --Hugh Miller.

         A capricious partiality to the Romish practices.
                                                  --Hallam.

   Syn: Freakish; whimsical; fanciful; fickle; crotchety;
        fitful; wayward; changeable; unsteady; uncertain;
        inconstant; arbitrary. -- {Ca*pri"cious*ly}, adv. --
        {Ca*pri"cious*ness}, n.

Source : WordNet®

capriciously
     adv 1: unpredictably; "the weather has been freakishly variable"
            [syn: {freakishly}]
     2: in a capricious manner; "there were Turk's head lilies and
        patches of iris , islands of brilliant blue set
        capriciously in the green sea"