Synonyms:
abortive, stillborn, unsuccessful
Meaning: failing to accomplish an intended result; "an abortive revolt"; "a stillborn plot to assassinate the President"
Usage examples
My advice and expostulations with my sons were abortive; and year after year their disaffection for each other increased.
Can they have been once a single planet broken up? or are they rather an abortive attempt at a planet never yet formed into one?
If all their efforts to procure rain prove abortive, they will remember that such and such a twin was buried in a dry place on the side of a hill.