efficacious

English

Etymology

From Old French efficacieux, from Latin efficax (“efficacious”), from efficere (“to effect, accomplish, to”); see effect.

Pronunciation

  • Rhymes: -eɪʃəs

Adjective

efficacious (comparative more efficacious, superlative most efficacious)

  1. Effective; possessing efficacy.

Translations

Further reading

  • efficacious in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
  • efficacious in The Century Dictionary, The Century Co., New York, 1911
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