Standard Lemma guide

infidelity

noun · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˌɪnfɪˈdɛlɪti/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 N F IH0 D EH1 L IH0 T IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 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.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Unfaithfulness in some other moral obligation.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Lack of religious belief.

Definition source: English Wiktionary via Wiktextract

Usage: archaic, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: irreligion

Antonyms: none provided

4

noun

Meaning 4

the quality of being unfaithful

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unfaithfulness

Antonyms: fidelity

Broader terms: quality

Narrower terms: faithlessness, falseness, fickleness, inconstancy, disloyalty

History

Etymology

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

Across languages

Translations

55 source translations are retained for this English entry.

  • Arabic: خِيَانَة (ḵiyāna) — unfaithfulness in marriage or other moral obligation
  • Asturian: infidelidá — unfaithfulness in marriage or other moral obligation
  • Belarusian: няве́рнасць (njavjérnascʹ) — unfaithfulness in marriage or other moral obligation
  • Bulgarian: невя́рност (nevjárnost) — unfaithfulness in marriage or other moral obligation
  • Catalan: infidelitat — unfaithfulness in marriage or other moral obligation
  • Chinese Mandarin: 異心 /异心 (yìxīn) — unfaithfulness in marriage or other moral obligation
  • Chinese Mandarin: 不貞 /不贞 (bùzhēn) — unfaithfulness in marriage or other moral obligation
  • Czech: nevěra — unfaithfulness in marriage or other moral obligation
  • Dutch: ontrouw — unfaithfulness in marriage or other moral obligation
  • Finnish: uskottomuus — unfaithfulness in marriage or other moral obligation
  • French: infidélité — unfaithfulness in marriage or other moral obligation
  • Galician: infidelidade — unfaithfulness in marriage or other moral obligation
  • German: Untreue — unfaithfulness in marriage or other moral obligation
  • Hungarian: hűtlenség — unfaithfulness in marriage or other moral obligation
  • Irish: mídhílseacht — unfaithfulness in marriage or other moral obligation
  • Macedonian: неверство (neverstvo) — unfaithfulness in marriage or other moral obligation
  • Macedonian: неверност (nevernost) — unfaithfulness in marriage or other moral obligation
  • Norwegian Bokmål: utroskap — unfaithfulness in marriage or other moral obligation
  • Polish: niewierność — unfaithfulness in marriage or other moral obligation
  • Portuguese: infidelidade — unfaithfulness in marriage or other moral obligation
  • Romanian: infidelitate — unfaithfulness in marriage or other moral obligation
  • Russian: неве́рность (nevérnostʹ) — unfaithfulness in marriage or other moral obligation
  • Scottish Gaelic: adhaltranas — unfaithfulness in marriage or other moral obligation
  • Serbo-Croatian: неверност — unfaithfulness in marriage or other moral obligation
  • Serbo-Croatian: невјерност — unfaithfulness in marriage or other moral obligation
  • Serbo-Croatian: nevernost — unfaithfulness in marriage or other moral obligation
  • Serbo-Croatian: nevjernost — unfaithfulness in marriage or other moral obligation
  • Slovak: nevera — unfaithfulness in marriage or other moral obligation
  • Slovene: nezvestoba — unfaithfulness in marriage or other moral obligation
  • Spanish: infidelidad — unfaithfulness in marriage or other moral obligation
  • Swedish: otrohet — unfaithfulness in marriage or other moral obligation
  • Turkish: ihanet — unfaithfulness in marriage or other moral obligation
  • Turkish: aldatma — unfaithfulness in marriage or other moral obligation
  • Ottoman Turkish: زنا (zinâ) — unfaithfulness in marriage or other moral obligation
  • Ukrainian: неві́рність (nevírnistʹ) — unfaithfulness in marriage or other moral obligation
  • Arabic: كُفْر (kufr) — lack of religious belief
  • Arabic: زَنْدَقَة (zandaqa) — lack of religious belief
  • Catalan: infidelitat — lack of religious belief
  • Czech: nevíra — lack of religious belief
  • Dutch: areligieus — lack of religious belief
  • Finnish: uskottomuus — lack of religious belief
  • Galician: infidelidade — lack of religious belief
  • Hungarian: hitetlenség — lack of religious belief
  • Hungarian: pogányság — lack of religious belief
  • Irish: ainchreideamh — lack of religious belief
  • Irish: éigreideamh — lack of religious belief
  • Manx: anchredjuaght — lack of religious belief
  • Polish: niewiara — lack of religious belief
  • Portuguese: infidelidade — lack of religious belief
  • Russian: безве́рие (bezvérije) — lack of religious belief
  • Russian: безбо́жие (bezbóžije) — lack of religious belief
  • Russian: неве́рие (nevérije) — lack of religious belief
  • Scottish Gaelic: neo-chreidmheachd — lack of religious belief
  • Spanish: infidelidad — lack of religious belief
  • Ottoman Turkish: كفر (küfr) — lack of religious belief