The Collaborative International Dictionary of English v.0.48:

Despise \De*spise"\, v. t. [imp. & p. p. Despised; p. pr. &
   vb. n. Despising.] [OF. despis-, in some forms of despire
   to despise, fr. L. despicere, despectum, to look down upon,
   despise; de- + spicere, specere, to look. See Spy, and cf.
   Despicable, Despite.]
   To look down upon with disfavor or contempt; to contemn; to
   scorn; to disdain; to have a low opinion or contemptuous
   dislike of.
   [1913 Webster]

         Fools despise wisdom and instruction.    --Prov. i. 7.
   [1913 Webster]

         Men naturally despise those who court them, but respect
         those who do not give way to them.       --Jowett
                                                  (Thucyd. ).

   Syn: To contemn; scorn; disdain; slight; undervalue. See
        Contemn.
        [1913 Webster]

WordNet (r) 3.0 (2006):

despised
    adj 1: treated with contempt [syn: despised, detested,
           hated, scorned]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "despised":
   contemned, declined, declined with thanks, denied, disapproved,
   discarded, discounted, disdained, disliked, dismissed, disowned,
   excepted, excluded, forsworn, ignored, lowly, misprized,
   misunderstood, not considered, out of favor, rebuffed, refused,
   rejected, renounced, repudiated, repulsed, scouted, spurned,
   thankless, unappreciated, uncared-for, unlamented, unmissed,
   unmourned, unpopular, unregretted, unsung, unvalued