The Collaborative International Dictionary of English v.0.48:

Discontent \Dis`con*tent"\, v. t. [imp. & p. p. Discontented;
   p. pr. & vb. n. Discontenting.]
   To deprive of content; to make uneasy; to dissatisfy.
   --Suckling.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Discontented \Dis`con*tent"ed\, p. p. & a.
   Dissatisfied; uneasy in mind; malcontent.
   [1913 Webster]

         And every one that was in distress, and every one that
         was in debt, and every one that was discontented,
         gathered themselves unto him.            --1 Sam. xxii.
                                                  2.
   -- Dis`con*tent"ed*ly, adv. -- Dis`con*tent"ed*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

discontented
    adj 1: showing or experiencing dissatisfaction or restless
           longing; "saw many discontent faces in the room"; "was
           discontented with his position" [syn: discontented,
           discontent] [ant: content, contented]