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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 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 But, these faithless actors have never changed the outcome of an election. Solcyré Burga, TIME, 28 Oct. 2024 See All Example Sentences for faithless
Recent Examples of Synonyms for faithless
Adjective
  • 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
  • That video drew the ire of President Donald Trump, who deemed it traitorous.
    Mike Wall, Space.com, 25 Nov. 2025
Adjective
  • However, these boat routes can be limited, and buying tickets on-site has historically been unreliable due to shifting timetables.
    Maria Williams, USA Today, 11 Jan. 2026
  • Designed to be compact and portable, HyDee is targeted at outdoor, industrial, and emergency applications, including scenarios where access to the electrical grid is unreliable or nonexistent.
    Neetika Walter, Interesting Engineering, 10 Jan. 2026
Adjective
  • Plants that provide winter interest, including sedums, goldenrod, blue false indigo, and ornamental grasses.
    Lauren Landers, Better Homes & Gardens, 11 Jan. 2026
  • Today’s teenagers can produce a TikTok video in minutes, but how many of them will learn to analyze the president’s false claim that Tylenol causes autism?
    Mary Ellen Klas, Twin Cities, 11 Jan. 2026
Adjective
  • Turns out, my husband has been suspicious of my evenings away and is now accusing me of being unfaithful.
    Harriette Cole, Mercury News, 29 Dec. 2025
  • The actress first turned heads in movies like The World According to Garp (1982) and The Natural (1984), then scared the bejesus out of unfaithful men everywhere with her chilling turn in Fatal Attraction (1987).
    Randall Colburn, Entertainment Weekly, 12 Dec. 2025
Adjective
  • Snow, ice and freezing temperatures hit parts of Europe on Tuesday, causing treacherous traffic conditions that left at least five people dead in France and forcing the cancellation of hundreds of flights from one of the continent’s busiest airports.
    Mike Corder, Los Angeles Times, 6 Jan. 2026
  • With a combination of rain and snow in the week prior, David Motley, the city’s public relations director, said beach conditions were treacherous.
    Steve Sadin, Chicago Tribune, 5 Jan. 2026

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Cite this Entry

“Faithless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/faithless. Accessed 12 Jan. 2026.

More from Merriam-Webster on faithless

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