The Collaborative International Dictionary of English v.0.48:

blunted \blunted\ adj.
   1. made dull or blunt.

   Syn: dulled.
        [WordNet 1.5]

   2. reduced in force or effectiveness.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Blunt \Blunt\, v. t. [imp. & p. p. Blunted; p. pr. & vb. n.
   Blunting.]
   1. To dull the edge or point of, by making it thicker; to
      make blunt. --Shak.
      [1913 Webster]

   2. To repress or weaken, as any appetite, desire, or power of
      the mind; to impair the force, keenness, or
      susceptibility, of; as, to blunt the feelings.
      [1913 Webster]

WordNet (r) 3.0 (2006):

blunted
    adj 1: made dull or blunt [syn: blunted, dulled]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "blunted":
   abrupt, bluff, blunt, blunt-edged, blunt-ended, blunt-pointed,
   bluntish, dull, dull-edged, dull-pointed, dulled, dullish,
   edgeless, faired, obtuse, pointless, rounded, smoothed, unedged,
   unpointed, unsharp, unsharpened