Definition of faithlessnext

Synonym Chooser

How is the word faithless different from other adjectives like it?

Some common synonyms of faithless are disloyal, false, perfidious, traitorous, and treacherous. While all these words mean "untrue to what should command one's fidelity or allegiance," faithless applies to any failure to keep a promise or pledge or any breach of allegiance or loyalty.

faithless allies

When can disloyal be used instead of faithless?

The synonyms disloyal and faithless are sometimes interchangeable, but disloyal implies a lack of complete faithfulness to a friend, cause, leader, or country.

disloyal to their country

When could false be used to replace faithless?

In some situations, the words false and faithless are roughly equivalent. However, false stresses the fact of failing to be true in any manner ranging from fickleness to cold treachery.

betrayed by false friends

How do perfidious and faithless relate to one another?

Perfidious adds to faithless the implication of an incapacity for fidelity or reliability.

a perfidious double-crosser

When is traitorous a more appropriate choice than faithless?

While the synonyms traitorous and faithless are close in meaning, traitorous implies either actual treason or a serious betrayal of trust.

traitorous acts punishable by death

When might treacherous be a better fit than faithless?

The meanings of treacherous and faithless largely overlap; however, treacherous implies readiness to betray trust or confidence.

a treacherous adviser

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 faithless In 2016, a record number of faithless votes were cast. Robert Alexander and Anna Dawley, MSNBC Newsweek, 23 Apr. 2025 Don Cheadle and Benicio del Toro are both quite good as part of a team that’s tasked with stealing a secret document, setting the stage for a drama involving gangsters, faithless lovers, and white-collar crooks. Tim Grierson, Vulture, 24 Jan. 2025 Once lost, now found, Ms. Brady offered the closing prayer as the smell of meatloaf promised lunch for the faithful and faithless alike. Moriah Ratner, New York Times, 24 Nov. 2024 Men are a structuring absence, as they are spoken of as faithless husbands, potential fiancés, feckless sons. John Bleasdale, Variety, 21 Nov. 2024 See All Example Sentences for faithless
Recent Examples of Synonyms for faithless
Adjective
  • 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
  • Russell fabricates a lie with the rest of the villains, and the heroes believe it, despite a warning from one traitorous tribemate.
    Literary Hub, Literary Hub, 5 Dec. 2025
Adjective
  • Polling in mayoral races is typically pretty unreliable.
    Los Angeles Times, Los Angeles Times, 1 June 2026
  • My father called the animal-control office, which was notoriously unreliable; in this case, someone there talked to the owner a couple of times and then gave up.
    Peter Hessler, New Yorker, 31 May 2026
Adjective
  • Today, rumors circulating on social media in the DRC include false claims that Ebola is not real, that humanitarian workers are descending on the area solely for their own profit and that aid groups are withholding the best care available.
    Gabrielle Emanuel, NPR, 29 May 2026
  • In January, Roberts pleaded guilty to making a false statement for employment and one count of unlawfully possessing a firearm while being in the country illegally.
    Corky Siemaszko, NBC news, 29 May 2026
Adjective
  • 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
Adjective
  • Installing his defensive ideals will be key to getting the Pels back to being competitive consistently in the treacherous Western Conference.
    William Guillory, New York Times, 27 May 2026
  • Many make long commutes over treacherous mountain roads to get to their workplace.
    Ernesto Sagás, The Conversation, 26 May 2026

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Cite this Entry

“Faithless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/faithless. Accessed 8 Jun. 2026.

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