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(of something inanimate or abstract) successful in producing a desired or intended result; effective:‘this treatment was efficacious in some cases’
successful, effectual, productive, constructive, fruitful, functional, potent, powerfulView synonyms
- ‘These drugs may be used topically or systemically and are safe and efficacious.’
- ‘The vaccine was presumed to be safe and efficacious.’
- ‘The use of allogenic tissue in orthopaedic surgery is generally safe and efficacious.’
- ‘This process has resulted in the designation of many psychotherapy treatments as being efficacious.’
- ‘Second, proving that a supposedly life extending drug will be efficacious is an extremely difficult task.’
- ‘It will prove efficacious to plant trees, shrubs and herbaceous plants in the autumn because they will get their roots down faster during their first wet winter.’
- ‘No difference was noted concerning one tradition being more powerful or efficacious than any other.’
- ‘We want to know that what we do is not merely efficacious but right.’
- ‘A small comparison study demonstrated that these two drugs are equally efficacious.’
- ‘History and theory show that the use of naked government aggression is not a moral or efficacious way of dealing with poverty.’
- ‘Most of these drugs are efficacious and have enormously enhanced the power of the physician to treat and cure disease.’
- ‘The ultimately most efficacious way is to change a group belief is from within.’
- ‘Both drugs were equally efficacious in improving auditory hallucinations and suspiciousness.’
- ‘So the same event or object can have a number of properties, not all of which are efficacious in bringing about the same effect.’
- ‘Clinical trials are in progress and research is ongoing for developing a safe and efficacious vaccine against the disease.’
- ‘When contemporary arts are produced for an international market, they can still be efficacious.’
- ‘During this era, biological discovery is accelerating, resulting in the development of safer and more efficacious drugs.’
- ‘There may be occasions, for instance, when a dose of old-fashioned common sense can be as efficacious as a more sophisticated remedy.’
- ‘This brings us to another question: are we using our existing personnel in the most efficient and efficacious way?’
- ‘It may not mean that the ultimate result is not efficacious.’
Early 16th century: from Latin efficax, efficac- (from efficere accomplish: see effect)+ -ious.
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