infidelity

/ˌɪnfɪˈdɛlɪti/

//ˌɪnfɪˈdɛlɪti// noun

By · According to Wiktionary data (CC BY-SA) ·

"infidelity" is a 10-letter English headword indexed on PlainSpell.

The verdict

“infidelity” has 15 generated spelling variants in the English index at frequency #20,672. The variants make it a useful spelling check.

#20,672
frequency rank, English
2,140
“I” headwords
15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - 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 o...

Corpus desk

Index EN-infidelity · infidelity · English

infidelity · rank #20,672 · 15 variants · 0 confusables

  • FREQ-MID #20,672
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 15 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH Icelandic

Nearest frequency peer: Icelandic (-2 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “infidelity”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “infidelity” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for infidelity
PropertyValue
Headwordinfidelity
LanguageEnglish
Part of speechNoun
IPA/ˌɪnfɪˈdɛlɪti/
Letters10
Frequency rank#20,672
Misspellings tracked15
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “infidelity”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).infidelitylands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “Icelandic” (#20,670), “inventive” (#20,674), “humbled” (#20,669). Among 2,140 “I” headwords, “infidelity” is #20,672. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around infidelity (IPA /ˌɪnfɪˈdɛlɪti/), anoun. Corpus frequency is #20,672 among 2,140 “I” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 15 likely wrong-spelling variants for infidelity, with forms such as "ifnidelity", "infdielity", and "inffidelity". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. We don't track a confusable pairing for this entry, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From Middle English infidelite, from Middle French infidelité (modern French infidélité) and its etymon Latin īnfidēlitās. Equivalent to infidel + -ity. The correct English form is infidelity, spelled I-N-F-I-D-E-L-I-T-Y.

Definition

  1. 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. 2
    Unfaithfulness in some other moral obligation.
  3. 3
    Lack of religious belief.

Recorded use

Wiktionary examples

These source excerpts show how infidelity appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Your friends tell you rumors about your girlfriend's infidelity or you remember being broken up around the time the baby was conceived.
  2. It was disastrous that England's infidelity towards Frederick the Great — which no one, not even a German, condemned more strongly than did William Pitt — had to affect one of the most popular heroes of our national history.

Etymology

From Middle English infidelite, from Middle French infidelité (modern French infidélité) and its etymon Latin īnfidēlitās. Equivalent to infidel + -ity.

Synonyms

Synonyms: adulterycuckoldrybetrayalfaithlessness

Antonyms

faithfulnessloyaltyfidelity

This word in other languages

infidelidad(Español)infidélité(Français)Untreue(Deutsch)infidelidade(Português)

Common misspellings

Also misspelled as:

  • ifnidelity
  • infdielity
  • inffidelity
  • infiddelity
  • infideilty
  • infidelitty
  • infidelityy
  • infideliyt
  • infidellity
  • infideltiy
  • infidleity
  • infiedlity
  • inifdelity
  • innfidelity
  • nifidelity

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of infidelity - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

ifnidelity2infdielity2inffidelity1infiddelity1infideilty2infidelitty1infidelityy1infideliyt2
Edit distance from "infidelity"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "infidelity"?
"infidelity" is spelled I-N-F-I-D-E-L-I-T-Y. The IPA pronunciation is /ˌɪnfɪˈdɛlɪti/.
What does "infidelity" mean?
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 someone other than one's spouse, without the consent o...
What are common misspellings of "infidelity"?
Common misspellings include "ifnidelity", "infdielity", "inffidelity", "infiddelity", "infideilty". The correct spelling is "infidelity".
How do you pronounce "infidelity"?
The IPA (International Phonetic Alphabet) transcription for "infidelity" is /ˌɪnfɪˈdɛlɪti/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "infidelity"?
From Middle English infidelite, from Middle French infidelité (modern French infidélité) and its etymon Latin īnfidēlitās. Equivalent to infidel + -ity. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "infidelity", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

foreground#20,640forcefully#20,639microscopy#20,708nonfiction#20,718

Similar misspelling depth

Headwords with a similar count of attested misspellings (15 here; floor ≥5).

ordinarily15 variantspenetrated15 variantsprojectile15 variantscomplicate15 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list