Word.ws English Dictionary

unefficacious

unefficacious adjective: not efficacious.

Adjective

unefficacious (comparative more unefficacious, superlative most unefficacious)

  1. Not efficacious.

Forms of unefficacious

comparativemore unefficacious
superlativemost unefficacious

Origin of unefficacious

From un- + efficacious.

Questions about unefficacious

What does unefficacious mean?
Unefficacious means not efficacious.
What part of speech is unefficacious?
Unefficacious is an adjective.

Words near unefficacious in the dictionary

  1. uneffectuated
  2. uneffeminate
  3. uneffeminated
  4. uneffervescent
  5. uneffete
  6. unefficacious
  7. unefficient
  8. uneffigiated
  9. uneffused
  10. uneffusive
  11. unegalitarian

Source and license

Adapted from Wiktionary: unefficacious (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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