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
  • The 5,000 sailors and Marines on board have been working sustained combat operations, dealing with extension after extension and unreliable access to food, basic hygiene supplies, and mail.
    — Andrea N. Goldstein, The Atlantic, 28 Aug. 2026
  • Print editions overseas also reach service members in remote locations where internet access is spotty and unreliable.
    — Jacob Rosen, CBS News, 27 Aug. 2026
Definition of unreliable
Adjective
  • The lawsuit filed by two former employees contains allegations that are false, misleading, and unsupported by credible evidence.
    — Devon Henderson, New York Times, 2 Sep. 2026
  • Zucker provided false and misleading statements to investigators, according to a summary of findings released Wednesday.
    — Dan Mangan, CNBC, 2 Sep. 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
  • Netanyahu is not on record as making that remark, but the slogan reflects a broader narrative promoted by Iranian hardliners, portraying women who do not wear the hijab as, at the very least, disloyal to their country.
    — Tim Lister, CNN Money, 23 Aug. 2026
  • 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
Definition of disloyal
Adjective
  • At face value, young men exercising should not be reason to sound the alarms, and yet there is something treacherous about men in their formative years placing physical beauty as the ultimate expression of self-actualization.
    — José Criales-Unzueta, Vanity Fair, 27 Aug. 2026
  • Jacksonville, a city of about 1 million, is particularly treacherous for children living in areas north and west of downtown.
    — Yona Gavino, Miami Herald, 25 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 4 Sep. 2026.

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