efficacy

CEFRC1

/ˈɛf.ɪ.kə.si/

noun

Türkçe translations

Translating…

In plain English

01
noun
The ability of something to produce the desired result.
02
noun
Extra detail
A degree of ability to produce a desired effect; effectiveness.

Examples

At a glance

Sits at C1 on the CEFR scale

Also pronounced

Deep Dive

Extra meaning

In context

2005, Flay et al. Standards of Evidence: Criteria for Efficacy, Effectiveness and Dissemination DOI: 10.1007/s11121-005-5553-y Efficacy refers to the beneficial effects of a program or policy under optimal conditions of delivery, whereas effectiveness refers...
Toothbrush with improved efficacy
[…]and this hath even made me ſuſpect the efficacy of reliques, to examine the bones, queſtion the habits and appurtenances of Saints, and even of Chriſt himſelf.

Two questions on this entry. Nothing is scored.

Question 1 · Quick check

Practise this properly in the app, where the word comes back before you forget it.

The word in print, with each source given in full.

[…]and this hath even made me ſuſpect the efficacy of reliques, to examine the bones, queſtion the habits and appurtenances of Saints, and even of Chriſt himſelf.
1642, Sir Thomas Browne, “Religio Medici [The Religion of a Doctor]”, in The Works Of the Learned Sr Thomas Brown, Kt., London: Tho. Basset et al., published 1686, page 15
No method of verification known to science is applicable to the efficacy of prayer. […] If, then, the efficacy of prayer eludes the test of science, and if even uncertainty may rest upon the connection between an event asked in prayer, and the prayer that sought it, is there any evidence by which the efficacy of prayer may be tested and known?
1875, Rev. Professor Wallace, “Prayer in Relation to Natural Law”, in Science and Revelation, Belfast: William Mullan, →ISBN, page 43

Looking a word up is the easy part. LexUp remembers which words you have met and brings them back at the point you were about to forget them.

From Old French efficace, from Late Latin efficācia (“efficacy”), from efficāx (“efficacious”); see efficacious.