What is the opposite of efficacy?

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Contexts ▼▲ Opposite of the ability to produce a desired effect or result Opposite of the state or condition of being useful Opposite of the benefit, importance or (useful) effect of something Opposite of the effectiveness of an event or story Opposite of a quality considered good morally, or that gives something special worth … more ▼ ▲ Noun ▲ Opposite of the ability to produce a desired effect or result ineffectiveness ineffectuality ineffectualness inefficacy inefficiency failure impotence inability inactivity inadequacy incapacity powerlessness unproductiveness uselessness weakness incapability futility vanity hopelessness fruitlessness helplessness infirmity incompetence disorganisationUK disorganizationUS carelessness unsuccessfulness ineptness slackness sloppiness nonsuccess lethargy invalidity disability impotency feebleness unimportance ineptitude idleness enervation wastefulness insufficiency disregard unfulfillment otiosity ignorance unproductivity disorder inutility incompetency disorderliness disorderedness lack laziness apathy inconclusiveness illogicality vagueness debility weakliness fragility delicacy decrepitude delicateness tiredness frailness faintness enfeeblement languor fatigue languidness puniness shakiness exhaustion debilitation lowness asthenia inadequateness unsatisfactoriness Noun ▲ Opposite of the state or condition of being useful uselessness worthlessness disadvantage disutility handicap hindrance inappropriateness inefficiency inutility loss unsuitability weakness inadequacy ineffectiveness futility inefficacy ineptitude senselessness incompetence incapability inability incapacity unusableness detriment ineffectualness inapplicability ineffectuality impracticality pointlessness drawback hopelessness downside ineptness unworkability shortcoming infirmity con Noun ▲ Opposite of the benefit, importance or (useful) effect of something insignificance inconsequence irrelevance inapplicability inconsequentiality impertinence immateriality irrelevancy unimportance uselessness frivolity immaterialness inappropriateness inconsequentialness indifference insignificancy negligibility triviality unrelatedness worthlessness inadequateness valuelessness littleness slightness insubstantiality pettiness frivolousness inconsiderableness negligibleness trivialness “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 triviality pointlessness defectiveness irrelevance unimportance frivolity stupidity idiocy inanity needlessness purposelessness trivialness uselessness aimlessness futility inconsequence meaninglessness nonsense senselessness trifle worthlessness frivolousness helplessness impotence impotency powerlessness weakness paltriness vanity “Given the satirical clout of his greatest operettas, the charge of triviality now strikes us as absurd, but it rankled.” Noun ▲ Opposite of a quality considered good morally, or that gives something special worth failing shortcoming deficiency disadvantage failure fault foible inadequacy weakness demerit disvalue flaw limitation blemish defect vice drawback frailty imperfection weak point inefficacy powerlessness invalidity hollowness worthlessness ineffectiveness ineffectuality emptiness impotence futility infirmity hopelessness vincibility feebleness flimsiness uselessness vulnerability impairment “His biggest failing is that he is willing to defend the King's transgressions, even when it is indefensible.” Find more words! 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Sentences with the word efficacy Words that rhyme with efficacy What is the plural of efficacy? What is the adverb for efficacy? What is the adjective for efficacy? What is the noun for efficacy? Translations for efficacy Use our Antonym Finder Nearby Words efficiencies efficiency efficient efficiently effigies effigurate efficacity efficacities efficaciousness efficaciously efficacious efficacies 8-letter Words Starting With e ef eff effi effic effica efficac