prohibitive

from WordNet (r) 3.0 (2006)

prohibitive
    adj 1: tending to discourage (especially of prices); "the price
           was prohibitive" [syn: {prohibitive}, {prohibitory}]

from The Collaborative International Dictionary of English v.0.48

Prohibitive \Pro*hib"it*ive\, a. [Cf. F. prohibitif.]
   That prohibits; prohibitory; as, a tax whose effect is
   prohibitive.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

67 Moby Thesaurus words for "prohibitive":
      abusive, criminal, cutthroat, dear, deterrent, deterring,
      discouraging, ethnocentric, exacting, exceptional, excessive,
      excluding, exclusive, exclusory, exorbitant, extortionate,
      extravagant, fancy, forbidding, forestalling, gouging,
      grossly overpriced, high, immoderate, inadmissible, inflationary,
      inhibitive, inhibitory, inordinate, insular, insupportable,
      interdictive, interdictory, narrow, out of bounds, out of sight,
      outlandish, outrageous, overpriced, parochial, preclusive,
      preposterous, prescriptive, preventative, preventive, prohibiting,
      prohibitory, prophylactic, proscriptive, repressive, restraining,
      restrictive, seclusive, segregative, select, selective, separative,
      skyrocketing, snobbish, spiraling, suppressive, unconscionable,
      undue, unreasonable, unwarranted, usurious, xenophobic