"unsuccessful" in the adjective sense
1. unsuccessful
not successful having failed or having an unfavorable outcome
2. abortive, stillborn, unsuccessful
failing to accomplish an intended result
"an abortive revolt"
"a stillborn plot to assassinate the President"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License