disenchanting disillusioning

from The Collaborative International Dictionary of English v.0.48

convincing \convincing\ adj.
   causing one to believe the truth of something; having the
   power to influence or convince; cogent; -- of evidence or
   testimony; as, a convincing manner. Opposite of
   {unconvincing}.

   Note: [Narrower terms: {disenchanting, disillusioning}] [Also
         See: {persuasive}.]

   Syn: cogent, potent.
        [WordNet 1.5 +PJC]