Meanings
comparative more unfaithful · superlative most unfaithful
- Not having religious faith.
- Not keeping good faith; disloyal; not faithful.
Synonyms: faithless, nonfaithful, unleal, booky, dastardly, disleal, disloyal, double-crossing
- Adulterous.
French Gates has said that many things contributed to her decision to divorce Bill in 2021 after 27 years of marriage, among them that he was unfaithful to her and that he maintained contact with Epstein, despite her objections.
2026 June 13, Sophie McBain, “‘Have you ever been around someone you just know is evil?’ Melinda French Gates on meeting Jeffrey Epstein, giving away billions, and her post-divorce peace”, in The Guardian, →ISSN - Not honest or upright.
- Negligent or imperfect.
The painting was an unfaithful rendering of its subject.
- human sciencesNot faithfully rendering the meaning of the source language; incorrect.
Synonyms & antonyms
adjectiveNot keeping good faith; disloyal; not faithful.
More synonyms by meaning
adjectivenot true to duty or obligation or promises
adjectivehaving sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend
adjectivehaving the character of, or characteristic of, a traitor
adjectivenot trustworthy
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Middle Englishunfeithful
- Englishunfaithful
From Middle English unfeithful, equivalent to un- + faithful.
More words from Middle English
Full word history & related roots →Translations
Ancient Greek μοιχικός
- μοιχικός (moikhikós)adulterous
Arabic كَافِر, خَائِن
- كَافِر (kāfir)not having religious faith
- خَائِن (ḵāʔin)not keeping good faith; disloyal; not faithful
Bulgarian нерелигиозен, нелоялен
- нерелигиозен (nereligiozen)not having religious faith
- нелоялен (nelojalen)not keeping good faith; disloyal; not faithful
- неверен (neveren)adulterous
- изневеряващ (izneverjavašt)adulterous
- нечестен (nečesten)not honest or upright
- неточен (netočen)of a translation: incorrect
Catalan infidel, infidel
- infidelnot having religious faith
- infidelnot keeping good faith; disloyal; not faithful
- infidelof a translation: incorrect
Chinese Mandarin 不忠實 /不忠实
- 不忠實 /不忠实 (bùzhōngshí)of a translation: incorrect
Danish utro
- utronot keeping good faith; disloyal; not faithful
Finnish uskoton
- uskotonnot keeping good faith; disloyal; not faithful
French infidèle, infidèle
- infidèlenot having religious faith
- infidèlenot keeping good faith; disloyal; not faithful
German ungläubig, untreu
- ungläubignot having religious faith
- untreunot keeping good faith; disloyal; not faithful
- unaufrichtignot honest or upright
- unehrlichnot honest or upright
- nicht getreuof a translation: incorrect
Latin infidēlis, adulter
- infidēlisnot keeping good faith; disloyal; not faithful
- adulteradulterous
Māori toukohi, tōkohi
- toukohiadulterous
- tōkohiadulterous
- pūremuadulterous
Norwegian Bokmål utro
- utronot keeping good faith; disloyal; not faithful
Polish niewierny, niewierny
- niewiernynot having religious faith
- niewiernynot keeping good faith; disloyal; not faithful
- niewiernyadulterous
- niewiernyof a translation: incorrect
Russian неве́рующий, неве́рный
- неве́рующий (nevérujuščij)not having religious faith
- неве́рный (nevérnyj)not having religious faith
- неве́рный (nevérnyj)not keeping good faith; disloyal; not faithful
- неве́рный (nevérnyj)adulterous
- неве́рный (nevérnyj)not honest or upright
- нече́стный (nečéstnyj)not honest or upright
- неи́скренний (neískrennij)not honest or upright
- нето́чный (netóčnyj)of a translation: incorrect
- неве́рный (nevérnyj)of a translation: incorrect
Spanish infiel, infiel
- infielnot having religious faith
- infielnot keeping good faith; disloyal; not faithful
- infieladulterous
- infielof a translation: incorrect
Welsh di-ffydd, anghrediniol
- di-ffyddnot having religious faith
- anghrediniolnot having religious faith
- anffyddlonnot keeping good faith; disloyal; not faithful
Cite this entry
unfaithful. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/unfaithful
“unfaithful.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unfaithful. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “unfaithful,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/unfaithful.
Source: unfaithful on Wiktionary, CC BY-SA 4.0.