Source : Webster's Revised Unabridged Dictionary (1913)

Obstinate \Ob"sti*nate\, a. [L. obstinatus, p. p. of obstinare
   to set about a thing with firmness, to persist in; ob (see
   {Ob-}) + a word from the root of stare to stand. See {Stand},
   and cf.{Destine}.]
   1. Pertinaciously adhering to an opinion, purpose, or course;
      persistent; not yielding to reason, arguments, or other
      means; stubborn; pertinacious; -- usually implying
      unreasonableness.

            I have known great cures done by obstinate
            resolution of drinking no wine.       --Sir W.
                                                  Temple.

            No ass so meek, no ass so obstinate.  --Pope.

            Of sense and outward things.          --Wordsworth.

   2. Not yielding; not easily subdued or removed; as, obstinate
      fever; obstinate obstructions.

   Syn: Stubborn; inflexible; immovable; firm; pertinacious;
        persistent; headstrong; opinionated; unyielding;
        refractory; contumacious. See {Stubborn}. --
        {Ob"sti*nate*ly}, adv. -- {Ob"sti*nate*ness}, n.

Source : WordNet®

obstinately
     adv : in a stubborn unregenerate manner; "she remained stubbornly
           in the same position" [syn: {stubbornly}, {pig-headedly},
            {obdurately}, {mulishly}, {cussedly}]