efficacious

English dictionary entry

Meanings

adj

/ˌɛf.ɪˈkeɪ.ʃəs/ LL-Q1860 (eng)-Vealhurl-efficacious.wav /ˌɛf.əˈkeɪ.ʃəs/ /ˌef.əˈkæɪ.ʃəs/

efficacious more efficacious most efficacious

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

effective

inefficacious

effect effective effectivity effectual efficacity efficacy efficiency efficient

efficaciously efficaciousness nonefficacious subefficacious unefficacious

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