effectiveness
/ɪˈfɛk.tɪv.nɪs/noun
effectiveness is spelled E-F-F-E-C-T-I-V-E-N-E-S-S: 13 letters and 4 syllables. It appears 11 times per million words in written English, the 6,565th most frequent word form (wordfreq, 2021 data). As a noun, effectiveness means “The property of being effective, of achieving results” (English Wiktionary, September 2026). The plural of effectiveness is effectivenesses.
How many letters and syllables are in effectiveness?
| Letters | 13: E-F-F-E-C-T-I-V-E-N-E-S-S |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | 11 times per million words; the 6,565th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is effectiveness?
Effectiveness appears 11 times per million words in written English, the 6,565th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce effectiveness?
- /ɪˈfɛk.tɪv.nɪs/
- /əˈfɛk.tɪv.nəs/
Effectiveness has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-effectiveness.ogg, Wikimedia Commons (author and licence on each file's page).
Forms of effectiveness
- effectivenesses plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does effectiveness mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The property of being effective, of achieving results.
The effectiveness of the drug was well established.
- 2
The capacity or potential for achieving results.
- 3
The degree to which something achieves results.
He questioned the effectiveness of the treatment.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Effectiveness in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | efficacité |
| German | Wirksamkeit, Effektivität, Wirkungsfähigkeit , Durchsetzungsfähigkeit, Durchsetzungsvermögen |
| Portuguese | eficiência |
| Spanish | efectividad , eficacia |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.