What is the opposite of effectiveness?

Need antonyms for effectiveness? Here's a list of opposite words from our thesaurus that you can use instead.

Noun
Opposite of the power to produce the desired result
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Noun
Opposite of the capability of a person or argument to convince or persuade
Noun
Opposite of the state or condition of being useful
Noun
Opposite of the benefit, importance or (useful) effect of something
“The insignificance of relaxation to stress relief is a myth. It is, in fact, crucial.”
Noun
Opposite of the effectiveness of an event or story
“Given the satirical clout of his greatest operettas, the charge of triviality now strikes us as absurd, but it rankled.”
Noun
Opposite of the capability of a person or argument to convince or persuade
“The unsatisfactoriness and unconvincingness of these claims soon became apparent in the psychoanalytic literature.”
Noun
Opposite of cost-effectiveness
Noun
Opposite of the ability to find appropriate expression for one's thoughts
Noun
Opposite of the quality of being impressive
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