Source : Webster's Revised Unabridged Dictionary (1913)

Dishevel \Di*shev"el\ (d[i^]*sh[e^]v"'l or -[e^]l), v. t. [imp.
   & p. p. {Disheveled}or {Dishevelled}; p. pr. & vb. n.
   {Disheveling} or {Dishevelling}.] [OF. descheveler, F.
   d['e]cheveler, LL. discapillare; dis- + L. capillus the hair
   of the head. See {Capillary}.]
   1. To suffer (the hair) to hang loosely or disorderly; to
      spread or throw (the hair) in disorder; -- used chiefly in
      the passive participle.

            With garments rent and hair disheveled, Wringing her
            hands and making piteous moan.        --Spenser.

   2. To spread loosely or disorderly.

            Like the fair flower disheveled in the wind.
                                                  --Cowper.

Source : WordNet®

dishevelled
     adj : in disarray; extremely disorderly; "her clothing was
           disheveled"; "powder-smeared and frowzled"; "a rumpled
           unmade bed"; "a bed with tousled sheets"; "his brown
           hair was tousled, thick, and curly"- Al Spiers [syn: {disheveled},
            {frowzled}, {rumpled}, {tousled}]

dishevel
     v : disarrange or rumple; dishevel; "The strong wind tousled my
         hair" [syn: {tousle}, {tangle}]
     [also: {dishevelling}, {dishevelled}]

dishevelled
     See {dishevel}