Abortive (adjective)

1. Failing to produce the intended result; unsuccessful.
2. Ending prematurely; cut short.
3. Relating to or causing abortion.

Origin:

From latin abortivus, from aboriri "to miscarry".

Examples:

1. The meeting was abortive as the main speaker did not turn up.
2. The attempt to launch a new product was abortive as it was not well received by the market.
3. The negotiations were abortive and no agreement was reached.
4. The pregnancy was terminated due to an abortive fetus.
5. The treatment was abortive and did not cure the disease.