Synonyms
Antonyms
Etymology

1. efficacious

adjective. ['ˌɛfəˈkeɪʃəs'] marked by qualities giving the power to produce an intended effect.

Synonyms

  • effectual
  • efficacy
  • efficaciousness

Antonyms

  • inefficacy
  • inefficacious
  • sterile
  • uninfluential

Etymology

  • efficacieux (Old French (842-ca. 1400))
  • efficax (Latin)

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Rhymes with Efficacious

  • proteinaceous
  • perspicacious
  • ostentatious
  • crustaceous
  • vexatious
  • predaceous
  • mendacious
  • loquacious
  • flirtatious
  • voracious
  • vivacious
  • tenacious
  • sebaceous
  • salacious
  • ignatius
  • horatius
  • hellacious
  • fallacious
  • capacious
  • spacious
  • herbaceous
  • gracious
  • ceraceous
  • audacious

Sentences with efficacious


1. Adjective
Your physician can make diet and nutrition recommendations that are both safe and efficacious.

2. efficacious

adjective. ['ˌɛfəˈkeɪʃəs'] producing or capable of producing an intended result or having a striking effect.

Synonyms

  • stiff
  • strong
  • effective
  • effectuality
  • impelling
  • impressive
  • effectiveness
  • effectual
  • trenchant
  • efficient
  • utile
  • effectivity
  • hard-hitting
  • effectualness
  • powerful
  • rough-and-ready
  • telling
  • useful

Antonyms

  • ineffectiveness
  • impotent
  • powerless
  • useless
  • ineffective

Etymology

  • efficacieux (Old French (842-ca. 1400))
  • efficax (Latin)
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