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Ineffective vs Inefficacy - What's the difference?

ineffective | inefficacy |

As an adjective ineffective

is not having the desired effect; ineffectual.

As a noun inefficacy is

the condition of being ineffective.

ineffective

English

Adjective

(en adjective)
  • not having the desired effect; ineffectual
  • lacking in ability; incompetent or inadequate

    • inefficacy

    English

    Noun

    (-)
  • The condition of being ineffective