unfaithful
adjective
unfaithful is spelled U-N-F-A-I-T-H-F-U-L: 10 letters and 3 syllables. It appears 1.2 times per million words in written English, the 26,420th most frequent word form (wordfreq, 2021 data). As an adjective, unfaithful means “Not having religious faith” (English Wiktionary, September 2026).
How many letters and syllables are in unfaithful?
| Letters | 10: U-N-F-A-I-T-H-F-U-L |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | 1.2 times per million words; the 26,420th 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 unfaithful?
Unfaithful appears 1.2 times per million words in written English, the 26,420th 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 unfaithful?
Unfaithful has 3 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: LL-Q1860_(eng)-Vealhurl-unfaithful.wav, Wikimedia Commons (author and licence on each file's page).
Forms of unfaithful
- more unfaithful comparative
- most unfaithful superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does unfaithful mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Not having religious faith.
- 2
Not keeping good faith; disloyal; not faithful.
- 3
Adulterous.
- 4
Not honest or upright.
- 5
Negligent or imperfect.
The painting was an unfaithful rendering of its subject.
- 6
Not faithfully rendering the meaning of the source language; incorrect.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Unfaithful in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | infidèle |
| German | ungläubig , untreu , unaufrichtig, unehrlich , nicht getreu |
| Spanish | infiel |
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.
Where does unfaithful come from?
From Middle English unfeithful, equivalent to un- + faithful.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).