The Collaborative International Dictionary of English v.0.48:

Impassion \Im*pas"sion\, v. t. [Pref. im- in + passion. Cf.
   Empassion, Impassionate, v.]
   To move or affect strongly with passion. [Archaic] --Chapman.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "impassion":
   agitate, annoy, arouse, awake, awaken, blow the coals, blow up,
   call forth, call up, enkindle, enrage, excite, fan, fan the fire,
   fan the flame, feed the fire, ferment, fire, flame, foment, frenzy,
   heat, heat up, incense, incite, inflame, infuriate, instigate,
   key up, kindle, lather up, light the fuse, light up, madden, move,
   nettle, overexcite, pique, provoke, put up to, rally, rouse,
   set astir, set fire to, set on, set on fire, sic on, steam up,
   stir, stir the blood, stir the embers, stir the feelings, stir up,
   summon up, tickle, turn on, wake, wake up, waken, warm,
   warm the blood, whet, whip up, work into, work up