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What is the difference between effectual and efficacy?

effectual | efficacy | Related terms |

Efficacy is a related term of effectual.



As an adjective effectual

is producing the intended result; entirely adequate.

As a noun efficacy is

ability to produce a desired amount of a desired effect.

effectual

English

Alternative forms

* effectuall (obsolete)

Adjective

(en adjective)
  • Producing the intended result; entirely adequate.
  • {{quote-Fanny Hill, part=3 , Redoubling, then, the active energy of his thrusts, favoured by the fervid appetite of my motions, the soft oiled wards can no longer stand so effectual a picklock, but yield, and open him an entrance.}}

    Antonyms

    * ineffectual

    efficacy

    English

    Noun

    (-)
  • (uncountable) Ability to produce a desired amount of a desired effect.
  • Synonyms

    * efficacity