efficacious

How many syllables in efficacious?

  4 syllables

Divide efficacious into syllables:   ef-fi-ca-cious
Primary syllable stress:   ef-fi-ca-cious
Secondary syllable stress:   ef-fi-ca-cious
How to pronounce efficacious:   ef-i-key-shus
How to say efficacious:

Cite This Source

Bibliography Citations
MLA   |    APA   |   Chicago Manual Style
"efficacious." HowManySyllables.com. How Many Syllables, n.d. Web. 27 March 2026.

Learn a New Word

Syllable Quiz
Can you divide
our into syllables?

Synonyms for efficacious


3 syllables
4 syllables
    Let Teachers Teach Contest
    How could $250 help your students?

    Prize awarded to a teacher each month.
    Fun Fact
    Pennsylvania and Louisiana are the only states with 5 syllables.
    Why Is
    Why is orange
    2 syllables?
    What rhymes with efficacious

    2 syllables
    3 syllables
    4 syllables
    6 syllables
      Do You Know
      when you should use
      Whether and Weather?

      Parents, Teachers, StudentsDo you have a grammar question?
      Need help finding a syllable count?
      Want to say thank you?