unfaithful

adjective

ˌən-ˈfāth-fəl How to pronounce unfaithful (audio)
Definition of unfaithfulnext
as in traitorous
not true in one's allegiance to someone or something colonists who later proved to be unfaithful to the cause of independence

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of unfaithful Platner is also an unfaithful spouse who mistreats women. — Chris Roemer, Baltimore Sun, 25 June 2026 Starring Yakusho Koji, the film follows a man released on parole after killing his unfaithful wife. — Naman Ramachandran, Variety, 13 May 2026 The golden calf famously enraged Moses, showing that the Israelites had turned away from God and were unfaithful in Moses’s absence. — Britta Miller, The Washington Examiner, 9 May 2026 Portraits of him as a cheating drunk, who was unfaithful to his first wife, Julia Nye, also surfaced. — Kory Grow, Rolling Stone, 6 May 2026 See All Example Sentences for unfaithful
Recent Examples of Synonyms for unfaithful
  1. traitorous
  2. unreliable
  3. false
  4. faithless
  5. disloyal
  6. treacherous
Adjective
  • Telemachus’ lone contribution is killing Melanthius, the traitorous Ithacan farmhand, thus preventing him from continuing to arm the suitors.
    — Marlow Stern, Variety, 17 July 2026
  • And at the very center of Hell is Satan himself, the traitorous Archangel Lucifer, depicted as a monstrous creature with wings and three heads.
    — Keith Cooper, Space.com, 11 May 2026
Definition of traitorous
Adjective
  • Solar use has surged in South Africa and Nigeria as households and businesses look for alternatives to unreliable state-run grids.
    — Alexander Onukwue, semafor.com, 15 Aug. 2026
  • Girls such as Zainab have been pushed out of the classroom entirely and left to depend on costly, unreliable alternatives.
    — Fatima Faizi, NPR, 14 Aug. 2026
Definition of unreliable
Adjective
  • But to build a web of accusations based on false premises and the manipulation of reality in order to attack the Biennale and a film invited to compete is a petty and unacceptable act.
    — John Bleasdale, Variety, 19 Aug. 2026
  • China’s aircraft engineers have warned that artificial intelligence could feed false data into military intelligence, potentially distorting the design and operation of advanced weapons.
    — Aamir Khollam, Interesting Engineering, 19 Aug. 2026
Definition of false
Adjective
  • The French had said the British were faithless.
    — Literary Hub, Literary Hub, 20 May 2026
  • Consumed by rage and betrayal, Eleanor is driven to take a bloody, supernatural revenge upon her faithless husband.
    — Robert Lang, Deadline, 27 Dec. 2025
Definition of faithless
Adjective
  • Fans were quick to take to the comments of Washington’s post, with many joking that the actress was being disloyal to her other onscreen Scandal love interest, Fitzgerald Grant, played by Tony Goldwyn.
    — Virginia Chamlee, PEOPLE, 16 July 2026
  • What This Moment Is Actually About Gen Zers aren't disloyal, lazy or unreasonable for wanting job security.
    — Vince Carrabba, Forbes.com, 8 July 2026
Definition of disloyal
Adjective
  • When planning paths and features, follow the contour of the slope rather than going straight up and down to slow water and create less treacherous access.
    — Mary Marlowe Leverette, Southern Living, 11 Aug. 2026
  • The Hand of the Queen will have a treacherous road ahead, especially with the increasingly dictatorial Queen Rhaenyra (Emma D'Arcy), who was in no big rush to save Corlys from Ormund's clutches.
    — Bryan Alexander, USA Today, 10 Aug. 2026
Definition of treacherous

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unfaith
unfaithful
unfaithfulness
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Cite this Entry

“Unfaithful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithful. Accessed 21 Aug. 2026.

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More from Merriam-Webster on unfaithful

Nglish: Translation of unfaithful for Spanish Speakers

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