efficacious

Definition from Wiktionary, the free dictionary
Jump to navigation Jump to search

English[edit]

Etymology[edit]

From Old French efficacieux, from Latin efficāx (efficacious) +‎ -ous, from efficere (to effect, to accomplish); see effect.

Pronunciation[edit]

Adjective[edit]

efficacious (comparative more efficacious, superlative most efficacious)

  1. (formal) Effective; possessing efficacy. [from 1520s]
    this medicine is efficacious
    Synonym: effective
    Antonym: inefficacious
    • 1969, Susan Sontag, “What’s Happening in America”, in Styles of Radical Will, Kindle edition, Penguin Modern Classics, published 2009, →ISBN, page 195:
      The unquenchable American moralism and the American faith in violence are not just twin symptoms of some character neurosis taking the form of a protracted adolescence, which presages an eventual maturity. They constitute a full-grown, firmly installed national psychosis, founded, as are all psychoses, on the efficacious denial of reality.

Related terms[edit]

Translations[edit]

Further reading[edit]