abortive

Definitions

Failing to produce the intended result; unsuccessful.

Coming to nothing; premature or undeveloped.

Examples

The rebels made an abortive attempt to overthrow the government.

After several abortive efforts to start the engine, he finally decided to call a mechanic.

Synonyms

unsuccessful failed fruitless vain futile ineffectual unproductive

Antonyms

successful effective productive fruitful efficacious accomplished thriving