The Collaborative International Dictionary of English v.0.48:

Misinterpret \Mis`in*ter"pret\, v. t.
   To interpret erroneously; to understand or to explain in a
   wrong sense.
   [1913 Webster]

WordNet (r) 3.0 (2006):

misinterpret
    v 1: interpret falsely
    2: interpret wrongly; "I misread Hamlet all my life!" [syn:
       misread, misinterpret]
    3: interpret in the wrong way; "Don't misinterpret my comments
       as criticism"; "She misconstrued my remarks" [syn:
       misconstrue, misinterpret, misconceive,
       misunderstand, misapprehend, be amiss]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "misinterpret":
   bias, bugger up, color, contort, distort, err, garble,
   get one wrong, get wrong, gloss, judge amiss, make a miscue,
   make a mistake, misapply, misappreciate, misapprehend,
   miscalculate, miscite, miscompute, misconceive, misconjecture,
   misconstrue, miscue, misdeem, misdirect, misesteem, misestimate,
   misevaluate, misexplain, misexplicate, misexpound, misidentify,
   misjudge, misquote, misread, misreckon, misrender, misrepresent,
   mistake, misthink, mistranslate, misunderstand, misuse, misvalue,
   pervert, screw up, slant, squeeze, strain, strain the sense,
   torture, twist the words, varnish, wrench