Latin edit

Etymology edit

From efficiō (I make out, work out) +‎ -āx (inclined to).

Pronunciation edit

Adjective edit

efficāx (genitive efficācis, adverb efficāciter); third-declension one-termination adjective

  1. efficacious, effectual, powerful, efficient

Declension edit

Third-declension one-termination adjective.

Number Singular Plural
Case / Gender Masc./Fem. Neuter Masc./Fem. Neuter
Nominative efficāx efficācēs efficācia
Genitive efficācis efficācium
Dative efficācī efficācibus
Accusative efficācem efficāx efficācēs efficācia
Ablative efficācī efficācibus
Vocative efficāx efficācēs efficācia

Derived terms edit

Descendants edit

  • English: efficacious
  • French: efficace
  • Italian: efficace
  • Spanish: eficaz

References edit

  • efficax”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • efficax”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • efficax in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • efficax in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette