Source : Webster's Revised Unabridged Dictionary (1913)

Repugnance \Re*pug"nance\ (-nans), Repugnancy \Re*pug"nan*cy\
   (-nan-s?), n. [F. r['e]pugnance, L. repugnantia.]
   The state or condition of being repugnant; opposition;
   contrariety; especially, a strong instinctive antagonism;
   aversion; reluctance; unwillingness, as of mind, passions,
   principles, qualities, and the like.

         That which causes us to lose most of our time is the
         repugnance which we naturally have to labor. --Dryden.

         Let the foes quietly cut their throats, Without
         repugnancy.                              --Shak.

   Syn: Aversion; reluctance; unwillingness; dislike; antipathy;
        hatred; hostility; irreconcilableness; contrariety;
        inconsistency. See {Dislike}.

Source : WordNet®

repugnance
     n 1: intense aversion [syn: {repulsion}, {revulsion}, {horror}]
     2: the relation between propositions that cannot both be true
        at the same time [syn: {incompatibility}, {mutual
        exclusiveness}, {inconsistency}]