What does inefficacious mean in crosswords?

inefficacious means: lacking the power to produce a desired effect

Word entry · 13 letters

inefficacious

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13 lettersPart of speech adjectiveSorted acceffiiinosuStarts with IEnds with S0 clues

1I2N3E4F5F6I7C8A9C10I11O12U13S

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I____________

From in- + efficacious.

Source: Wiktionary, CC BY-SA 4.0

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