The Collaborative International Dictionary of English v.0.48:

Belittle \Be*lit"tle\, v. t. [imp. & p. p. Belittled; p. pr. &
   vb. n. Belittling.]
   To make little or less in a moral sense; to speak of in a
   depreciatory or contemptuous way. --T. Jefferson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

belittled
    adj 1: made to seem smaller or less (especially in worth); "her
           comments made me feel small" [syn: belittled,
           diminished, small]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "belittled":
   abated, ablated, attenuated, bated, consumed, contracted,
   curtailed, decreased, deflated, diminished, dissipated, dropped,
   eroded, fallen, less, lesser, lower, lowered, miniaturized,
   reduced, retrenched, scaled-down, shorn, shorter, shrunk, shrunken,
   smaller, watered-down, weakened, worn