efficaciousness

noun

efficaciousness

noun

Etymology From efficacious + -ness.

1

Quality of being efficacious.

In ancient mythology, the efficaciousness of the satyrion is attested, particularly in the case of Hercules.1961, Harry E. Wedeck, Dictionary of Aphrodisiacs, New York: The Citadel Press, page 216:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.