infidelity
/ˌɪnfɪˈdɛlɪti/noun
infidelity is spelled I-N-F-I-D-E-L-I-T-Y: 10 letters and 5 syllables. It appears 1.8 times per million words in written English, the 20,629th most frequent word form (wordfreq, 2021 data). As a noun, infidelity means “Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with…” (English Wiktionary, September 2026). The plural of infidelity is infidelities.
How many letters and syllables are in infidelity?
| Letters | 10: I-N-F-I-D-E-L-I-T-Y |
|---|---|
| Syllables | 5 (from its American pronunciation) |
| In writing | 1.8 times per million words; the 20,629th 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 infidelity?
Infidelity appears 1.8 times per million words in written English, the 20,629th 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 infidelity?
- /ˌɪnfɪˈdɛlɪti/
Infidelity has 5 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)-Vininn126-infidelity.wav, Wikimedia Commons (author and licence on each file's page).
Forms of infidelity
- infidelities plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does infidelity mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse.
- 2
Unfaithfulness in some other moral obligation.
- 3
archaicLack of religious belief.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Infidelity in Spanish, French, German and Portuguese
In the sense unfaithfulness in marriage or other moral obligation:
| Language | Words |
|---|---|
| French | infidélité |
| German | Untreue |
| Portuguese | infidelidade |
| Spanish | infidelidad |
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 infidelity come from?
From Middle English infidelite, from Middle French infidelité (modern French infidélité) and its etymon Latin īnfidēlitās. Equivalent to infidel + -ity.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).