[1] : The Collaborative International Dictionary of English v.0.48

unsuccessful \un`success"ful\, a.
   not successful; not producing the desired event; not
   fortunate; meeting with, or resulting in, failure; unlucky;
   unhappy. -- un`success"fully, adv. --
   un`success"fulness, n.
   1913 webster
see also:
un`success"fully un`success"fulness 

[2] : WordNet (r) 2.0

unsuccessful
     adj 1: not successful; having failed or having an unfavorable
            outcome ant: successful
     2: failing to accomplish an intended result; "an abortive
        revolt"; "a stillborn plot to assassinate the president"
        syn: abortive, stillborn
see also:
successful abortive stillborn 

[3] : Moby Thesaurus II by Grady Ward, 1.0

24 moby thesaurus words for "unsuccessful":
   abortive, balked, beaten, bootless, cursed, defeated, foiled,
   fruitless, frustrated, hapless, ineffective, ineffectual,
   inefficacious, luckless, sterile, unavailing, unfortunate,
   unfruitful, unlucky, unproductive, unprofitable, useless, vain,
   worthless

Unsuccessful >> U Words
Unsuccessful, definition of term: Unsuccessful
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