unfaithful

adj

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

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

The verdict

“unfaithful” has 15 generated spelling variants in the English index at frequency #26,644. The variants make it a useful spelling check.

#26,644
frequency rank, English
23,789
“U” headwords
15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Not having religious faith.

Key facts for unfaithful
PropertyValue
Headwordunfaithful
LanguageEnglish
Part of speechAdjective
Letters10
Frequency rank#26,644
Misspellings tracked15
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “unfaithful” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). unfaithful lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around unfaithful, anadjective. Corpus frequency is #26,644 among 23,789 “U” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 15 likely wrong-spelling variants for unfaithful, with forms such as "nufaithful", "ufnaithful", and "unafithful". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Middle English unfeithful, equivalent to un- + faithful. The correct English form is unfaithful, spelled U-N-F-A-I-T-H-F-U-L.

Definition

  1. 1
    Not having religious faith.
  2. 2
    Not keeping good faith; disloyal; not faithful.
  3. 3
    Adulterous.
  4. 4
    Not honest or upright.
  5. 5
    Negligent or imperfect.
  6. 6
    Not faithfully rendering the meaning of the source language; incorrect.

Etymology

From Middle English unfeithful, equivalent to un- + faithful.

Synonyms

nonfaithful

This word in other languages

infiel(Español)infidèle(Français)ungläubig(Deutsch)

Common misspellings

Also misspelled as:

  • nufaithful
  • ufnaithful
  • unafithful
  • unfaihtful
  • unfaitfhul
  • unfaithfful
  • unfaithflu
  • unfaithfull
  • unfaithhful
  • unfaithufl
  • unfaitthful
  • unfatihful
  • unffaithful
  • unfiathful
  • unnfaithful

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of unfaithful - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

nufaithful2ufnaithful2unafithful2unfaihtful2unfaitfhul2unfaithfful1unfaithflu2unfaithfull1
Edit distance from "unfaithful"

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 "unfaithful"?
"unfaithful" is spelled U-N-F-A-I-T-H-F-U-L.
What does "unfaithful" mean?
As an adjective, "unfaithful" means: Not having religious faith.
What are common misspellings of "unfaithful"?
Common misspellings include "nufaithful", "ufnaithful", "unafithful", "unfaihtful", "unfaitfhul". The correct spelling is "unfaithful".
What is the origin of the word "unfaithful"?
From Middle English unfeithful, equivalent to un- + faithful. 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.

Using “unfaithful”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is U-N-F-A-I-T-H-F-U-L - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words

Same frequency band

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list