Meaning : Producing no result or effect.
Example :
A futile effort.
The therapy was ineffectual.
An otiose undertaking.
An unavailing attempt.
Synonyms : ineffectual, meaningless, otiose, unavailing
Meaning : Unproductive of success.
Example :
A fruitless search.
Futile years after her artistic peak.
A sleeveless errand.
A vain attempt.
Synonyms : bootless, fruitless, sleeveless, vain