inefficacy

n.
The state or quality of being incapable of producing a desired effect or result.

noun

The condition or state of being incapable of accomplishing or effecting anything: helplessness, impotence, inadequacy, incapability, ineffectiveness, ineffectuality, ineffectualness, powerlessness, uselessness. See affect/ineffectiveness, strong/weak.

Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a lack of efficacy
  Synonym: inefficaciousness
  Antonym: efficacy (meaning #1)

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