Repugnance, Repugnancy, n.
Etymology: [F. répugnance, 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.
Shades of meaning
Fernald has no entry of its own for repugnance; he lists it under antipathy, hatred.
Where he writes about it:
Antipathy, repugnance, and uncongeniality are instinctive; other forms of dislike may be acquired or cherished for cause. — from antipathy
Repugnance applies to that which one feels himself summoned or impelled to do or to endure, and from which he instinctively draws back. — from hatred