efficacious
Getting it done
Efficacious means effective at producing a desired result, particularly in formal or technical contexts.
A vaccine proves efficacious in clinical trials; a remedy is efficacious against certain symptoms.
The word carries more weight than "effective," suggesting tested or demonstrated capability: The treatment was highly efficacious in reducing inflammation.
It appears most often in medical, scientific, and legal writing.
Generating useful output
- successfulHaving achieved one's aims
- usefulServing a purpose
- beneficialProducing good results
- functionalAble to operate correctly
practical · valuable · operative · competent · capable · reliable · viable · constructive
Promoting recovery from illness
- therapeuticPromoting healing or wellness
- restorativePromoting return to health
- healingRestoration of health
- medicinalHaving healing properties
palliative · ameliorative · soothing · alleviating · sanative · corrective · salutary · healthful
Having great effect
- powerfulHaving great strength
- forcefulExerting strong pressure
- compellingPowerfully engaging or persuasive
- convincingAble to persuade
influential · authoritative · commanding · impressive · dynamic · vigorous · robust · strong
Having considerable effect
- transformativeCausing major change
- consequentialHaving significant effects
- meaningfulHaving purpose or significance
- significantHaving notable importance
pivotal · instrumental · catalytic · decisive · far-reaching · substantial · momentous · game-changing
productive
Generating useful output
- successfulHaving achieved one's aims
- usefulServing a purpose
- beneficialProducing good results
functional · practical · valuable · operative · competent · capable · reliable · viable · constructive · fruitful
curative
Promoting recovery from illness
- therapeuticPromoting healing or wellness
- restorativePromoting return to health
- healingRestoration of health
medicinal · palliative · ameliorative · soothing · alleviating · sanative · corrective · salutary · healthful · recuperative
potent
Having great effect
- powerfulHaving great strength
- forcefulExerting strong pressure
- compellingPowerfully engaging or persuasive
convincing · influential · authoritative · commanding · impressive · dynamic · vigorous · robust · strong · concentrated
influential
Having considerable effect
- transformativeCausing major change
- consequentialHaving significant effects
- meaningfulHaving purpose or significance
significant · pivotal · instrumental · catalytic · decisive · far-reaching · substantial · momentous · game-changing
efficaciousineffective
Lacking power to achieve
inefficacious · ineffectual · useless · futile · fruitless