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
Relevance
Antonyms & Near Antonyms
1
as in infidelity
lack of faithfulness especially to one's husband or wife
he eventually forgave his wife's unfaithfulness
Synonyms & Similar Words
Antonyms & Near Antonyms
2
as in betrayal
the act or fact of violating the trust or confidence of another
the jaw-dropping unfaithfulness of the person she had considered her best friend was deeply hurtful
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in adultery
a sexual encounter or relationship between a married person and someone other than their spouse
there were charges of unfaithfulness on both sides
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of unfaithful
Dave Quinn, People.com, 27 Feb. 2025
In the present day, Alice, Brett, perfectionistic realtor Catherine (Aja Naomi King) and sloppy socialite Birdie (Melissa Fumero) are garden club buddies dealing with separate personal issues, like dead pets, unfaithful spouses and child custody battles.
—Angie Han, The Hollywood Reporter, 23 Feb. 2025
The New Yorker story alleged that Willingham had a reputation for drinking too much, being unfaithful and physically abusing Stacy.
—Emily Blackwood, People.com, 27 Feb. 2025
Medieval scholars – all men – defined women’s temperament in negative terms: Women were libidinous, frivolous, unfaithful, capricious, unpredictable and easily tempted.
—Joelle Rollo-Koster, The Conversation, 25 Feb. 2025
See All Example Sentences for unfaithful
Adjective
Emmy has stood by Will's side throughout it all, especially because he's denied being unfaithful.
—Dave Quinn, People.com, 27 Feb. 2025
In the present day, Alice, Brett, perfectionistic realtor Catherine (Aja Naomi King) and sloppy socialite Birdie (Melissa Fumero) are garden club buddies dealing with separate personal issues, like dead pets, unfaithful spouses and child custody battles.
—Angie Han, The Hollywood Reporter, 23 Feb. 2025
The New Yorker story alleged that Willingham had a reputation for drinking too much, being unfaithful and physically abusing Stacy.
—Emily Blackwood, People.com, 27 Feb. 2025
Medieval scholars – all men – defined women’s temperament in negative terms: Women were libidinous, frivolous, unfaithful, capricious, unpredictable and easily tempted.
—Joelle Rollo-Koster, The Conversation, 25 Feb. 2025
See All Example Sentences for unfaithful
Recent Examples of Synonyms for unfaithful
Adjective
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Foreign military interventions can change victims from being viewed as a nuisance into being seen as powerful and traitorous enemies, potentially capable of exacting revenge, seizing power, or breaking away from the state.—
Benjamin A. Valentino,
Foreign Affairs,
17 Oct. 2011
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But what will their first move as a traitorous duo be?—
Tom Smyth,
Vulture,
27 Feb. 2025
Noun
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Huston could recognize the ways of that brood: her own renowned and eccentric family inhabited that domestic world of privilege, power, infidelity, and intrigue that became Christie’s writerly milieu.—
Erik Morse,
Vogue,
15 Apr. 2025
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The exciting news comes after a tumultuous few months for Coi, who kicked off 2025 by announcing a child with Trippie before accusing him of infidelity.—
Mackenzie Cummings-Grady,
Billboard,
15 Apr. 2025
Noun
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The dream scenario, for many fans at least, was for Kingston and Woods’ betrayal of Big E to lead to an in-ring return for Big E, a former WWE Champion.—
Blake Oestriecher,
Forbes.com,
20 Apr. 2025
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But support for the Democrats plunged in 2010 after its leaders negotiated directly for universal suffrage with officials from Beijing’s liaison office in Hong Kong – a move seen as a betrayal by other pro-democracy groups.—
Chris Lau,
CNN Money,
19 Apr. 2025
Noun
-
Within the White Lotus, adultery abounds, couples engage in power plays, and flirtatious encounters occur among old friends and strangers alike.—
Sophie Gilbert,
The Atlantic,
8 Apr. 2025
-
In his 1991 book The Third Chimpanzee: The Evolution and Future of the Human Animal, biologist Jared Diamond claimed the adultery rate among humans was between 5% and 30%.—
ByAndrew Curry,
science.org,
6 Mar. 2025
Adjective
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All such theories, however, have appeared to be unreliable and speculative since any first strikes would have to contend with the risk of an enemy launch on warning as well as sufficient systems surviving for a devastating riposte.—
Lawrence D. Freedman,
Foreign Affairs,
14 Apr. 2025
-
Some customers worry Crusoe’s cloud system is unreliable.—
Christopher Helman,
Forbes.com,
10 Apr. 2025
Noun
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But the most intriguing finish—and the most on-brand level of treachery from Heyman—would be Paul stabbing both Roman and Punk in the back for Rollins.—
Alfred Konuwa,
Forbes.com,
19 Apr. 2025
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Sinners is about vampires, perpetual outsiders who desperately yearn to belong, but whose silky promises are rooted in treachery.—
Stephanie Zacharek,
Time,
18 Apr. 2025
Noun
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Nor is either party actually addressing the ballooning financial cost of local police forces in the U.S., nor the long-term reputational costs from police misconduct for trust in the police and government more broadly.—
Christopher S. Warshaw,
The Conversation,
18 Apr. 2025
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Court records show he was then indicted in June 2020 for misconduct in office.—
Will Carless,
USA Today,
18 Apr. 2025
Adjective
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But the jitters still shook him, a false-start whistle blowing on his first 40-yard attempt at February’s NFL combine.—
Luca Evans,
Denver Post,
13 Apr. 2025
-
Sanchez and her co-conspirators created false documents for the victims, including Permanent Residence cards and Social Security cards, and helped the victims find employment in the Hartford area.—
Stephen Underwood,
Hartford Courant,
12 Apr. 2025
Cite this Entry
“Unfaithful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithful. Accessed 28 Apr. 2025.
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