efficacityn.
/ɛfɪˈkasɪti/ = efficaciousness n. and efficacy n.
ΘΚΠ
the world > action or operation > advantage > efficacy > [noun]
mainOE
mightOE
strengthOE
efficace?c1225
bootingc1300
effectc1390
powera1393
boota1400
efficacity1430
operationc1450
valure1483
feck1495
efficacy1527
effectualness1545
effectuousnessa1576
validity1593
effectiveness1607
workingness1611
efficaciousnessa1628
operativeness1627
efficiency1633
effectualitya1641
energy1668
availablenessa1676
availment1699
potentialness1727
affectingnessa1774
effectivity1838
efficience1865
well working1879
1430–50 tr. Higden (1865) I. 61 [The occean] felethe by more efficacite the strenghte of ye moone then a see coartate.
1528 W. Roy Satire against Cardinal Wolsey (1845) Yf their paynted efficacite Is but as it semeth to be.
1543 B. Traheron tr. J. de Vigo Most Excellent Wks. Chirurg. i. v. f. 169v/2 The oyle of..saint Jhons wort is of singuler efficacitie, in all paynes of..the knee.
1624 Bp. F. White Replie to Iesuit Fishers Answere 540 I could bring Testimonies..of the efficacitie thereof to expiate sinne.
1678 T. Gale Court of Gentiles: Pt. IV 3 We may firmly assert..the efficacitie of Divine Concurse.
1775 J. Ash New Dict. Eng. Lang. Efficacity (from Efficacy, but not much used) Efficacy.
1869 R. Browning Ring & Bk. III. ix. 245 Better estimate Exorbitantly, than disparage aught Of the efficacity of the act.
1874 G. H. Lewes Probl. Life & Mind I. 114 The efficacity of Intelligence depends on the organs which cooperate.
1886 Sat. Rev. 21 Aug. 251/1 The National Liberal Federation..a monument of the efficacity..of programmes and delegacy.
This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2021).
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n.1430