inefficacy
Noun
Meaning
Want of power to produce the desired or proper effect; inefficiency; ineffectualness; futility; uselessness; fruitlessness; as, the inefficacy of medicines or means.
Source: Webster's dictionarySynonyms
inefficaciousness
failure
inability
disability
deficiency
ignorance
incompetence
vanity
futility
disqualification
emptiness
insufficiency
incapacity
inadequacy
ineffectiveness
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Antonyms
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Examples
The infidelity of the Gentile world, and that more especially of men of rank and learning in it, is resolved into a principle which, in my judgment, will account for the inefficacy of any argument, or any evidence whatever, viz.
Political experience is political inefficacy.