Synonyms and Antonyms of inefficacious
1 not producing the desired result his efforts to restore the neglected houseplant back to health were belated and sadly inefficacious Synonyms of inefficacious counterproductive, feckless, hamstrung, ineffectual, ineffective, inefficient, inexpedientWords Related to inefficacious abortive, bootless, fruitless, futile, nonproductive, pointless, profitless, unavailing, unproductive, unprofitable, unsuccessful, useless, worthlessNear Antonyms of inefficacious availing, beneficial, helpful, productive, profitable, successful, useful, worthwhileAntonyms of inefficacious effective, effectual, efficacious, efficient, expedient, operant, ultraefficient
2 producing no results an inefficacious medication for a rare form of tuberculosis Synonyms of inefficacious abortive, barren, bootless, empty, fruitless, ineffective, ineffectual, futile, otiose, profitless, unavailing, unproductive, unprofitable, unsuccessful, useless, vainWords Related to inefficacious hollow, idle, meaningless, pointless, valueless, worthless; hopeless, impossible, lost, no-win, unattainable; inadequate, insufficient, lacking, wanting; counterproductiveNear Antonyms of inefficacious meaningful, worthwhile; adequate, sufficient; applicable, feasible, functional, practicable, practical, realizable, usable (also useable), workableAntonyms of inefficacious deadly, effective, effectual, efficacious, efficient, fruitful, potent, productive, profitable, successful, virtuous
Learn More about inefficacious
Dictionary: Definition of inefficacious
Seen and Heard
What made you want to look up inefficacious? Please tell us where you read or heard it (including the quote, if possible).