The Collaborative International Dictionary of English v.0.48:

Antipathetic \An`ti*pa*thet"ic\, Antipathetical
\An`ti*pa*thet"ic*al\, a.
   Having a natural contrariety, or constitutional aversion, to
   a thing; characterized by antipathy; -- often followed by to.
   --Fuller.
   [1913 Webster]

WordNet (r) 3.0 (2006):

antipathetic
    adj 1: (usually followed by `to') strongly opposed;
           "antipathetic to new ideas"; "averse to taking risks";
           "loath to go on such short notice"; "clearly indisposed
           to grant their request" [syn: antipathetic,
           antipathetical, averse(p), indisposed(p),
           loath(p), loth(p)]
    2: characterized by antagonism or antipathy; "slaves
       antagonistic to their masters"; "antipathetic factions within
       the party" [syn: antagonistic, antipathetic,
       antipathetical]

Moby Thesaurus II by Grady Ward, 1.0:

132 Moby Thesaurus words for "antipathetic":
   abhorrent, acrid, adversary, adversative, adverse, adversive,
   alien, antagonistic, anti, antipodal, antithetic, antithetical,
   antonymous, at cross-purposes, at daggers drawn, at loggerheads,
   at odds, at variance, at war, balancing, belligerent, bitter,
   breakaway, caustic, clashing, colliding, compensating, competitive,
   con, conflicting, confronting, contradicting, contradictory,
   contradistinct, contrapositive, contrarious, contrary, contrasted,
   converse, counter, counteractant, counteracting, counteractive,
   counterbalancing, counterpoised, countervailing, counterworking,
   cranky, cross, crotchety, dead against, despiteful, differing,
   disaccordant, disagreeable, disagreeing, discordant, discrepant,
   disgusting, disharmonious, disproportionate, dissentient,
   dissident, dissonant, distasteful, divergent, enemy,
   eyeball to eyeball, fractious, full of hate, grating, hateful,
   hostile, immiscible, inaccordant, incompatible, inconsistent,
   inharmonious, inimical, inverse, jangling, jarring, loathsome,
   malevolent, malicious, malignant, negative, nonconformist,
   noncooperative, obnoxious, obstinate, obverse, opponent, opposed,
   opposing, opposite, oppositional, oppositive, oppugnant,
   out of accord, out of whack, overthwart, perverse, quarrelsome,
   rancorous, reactionary, recalcitrant, refractory, renitent,
   repellent, repugnant, repulsive, resistant, reverse, revolutionary,
   rival, set against, sore, spiteful, squared off, uncongenial,
   uncooperative, unfavorable, unfriendly, ungenial, unharmonious,
   unpropitious, unsympathetic, variant, venomous, virulent,
   vitriolic