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inefficacious

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
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2 producing no results

  • an inefficacious medication for a rare form of tuberculosis
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Phrases Synonymous with inefficacious

in vain, no dice, not worth the candle, of no avail

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