Word Pronunciation & Dictionary

efficaciousness

Word Rarity Very rare

Frequency: Zipf frequency 0.00 in modern English

Syllables: ef-fi-ca-cious-ness
IPA

25

Scrabble Score

15

Letters

5

Syllables

9

Unique Chars

Meaning

noun

Quality of being efficacious; efficacy.

Uncountable

Example Sentences

"In ancient mythology, the efficaciousness of the satyrion is attested, particularly in the case of Hercules."

Etymology

From efficacious + -ness.

Word Breakdown

Suffix: efficacious

Usage

Uncountable

Synonyms

efficacy

Questions

What does efficaciousness mean?: Quality of being efficacious; efficacy.
Where does efficaciousness come from?: From efficacious + -ness.

How to pronounce efficaciousness

Open the pronunciation page — Open the Speakur entry for “efficaciousness”.
Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
Play the audio — Click Play to hear reference audio for “efficaciousness”.
Repeat and practice — Say “efficaciousness” aloud, matching stress and vowels until it feels natural.