adjective
1.
Synonyms: futile , abortive, bootless, fruitless, ineffectual, unavailable, unavailing, unproductive, useless, vain
Antonyms: effective
2.
Synonyms: weak 4, boneless, emasculate, forceless, impotent, inadequate, ineffectual, invertebrate, slack-spined, spineless
3.
not producing or not capable of producing a required result
ineffective remedies
Synonyms: ineffectual, inefficacious, inefficient
Related Word: inadequate, incompetent, inferior; useless, worthless
Contrasted words: active, effectual, efficacious; esteemed, valuable
Antonyms: effective