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
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
Shelby Stewart, Essence, 21 Apr. 2025
Rebecca also had suspicions that Biggs-Marvin had been unfaithful to her.
—Caroline Blair, People.com, 8 May 2025
While together, Odom struggled with addiction and was unfaithful in their relationship.
—Michael Nied, People.com, 16 Apr. 2025
Intriguingly, the researchers found that these unfaithful chains-of-thought were, on average, longer than faithful ones, suggesting the omissions weren't merely for brevity.
—ArsTechnica, 10 Apr. 2025
See All Example Sentences for unfaithful
Adjective
Deflection and a subtle jab about Angela’s allegedly unfaithful husband.
—Shelby Stewart, Essence, 21 Apr. 2025
Rebecca also had suspicions that Biggs-Marvin had been unfaithful to her.
—Caroline Blair, People.com, 8 May 2025
While together, Odom struggled with addiction and was unfaithful in their relationship.
—Michael Nied, People.com, 16 Apr. 2025
Intriguingly, the researchers found that these unfaithful chains-of-thought were, on average, longer than faithful ones, suggesting the omissions weren't merely for brevity.
—ArsTechnica, 10 Apr. 2025
See All Example Sentences for unfaithful
Recent Examples of Synonyms for unfaithful
Adjective
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Michael Fassbender plays a British intelligence officer tasked with finding who leaked a top-secret software program and betrayed their country, and the list of five potentially traitorous suspects includes his own high-profile wife (Cate Blanchett).—
Brian Truitt,
USA Today,
10 May 2025
-
Smith made out their former collaborators to be ungrateful and traitorous, and the kids weren't given the space to question her command.—
Zoey Lyttle,
People.com,
18 Apr. 2025
Noun
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The entrepreneur and wellness coach addressed rumors of infidelity while responding directly to a fan’s accusation on Instagram.—
Amber Corrine,
VIBE.com,
23 May 2025
-
Honey is typically in the business of infidelity, taking cases involving suspicious spouses and their philandering partners.—
Lovia Gyarkye,
HollywoodReporter,
23 May 2025
Noun
-
One professor challenged that reasoning, which Casas repeated during the panel on Wednesday, telling the police chief that for students with fragile immigration statuses, being detained by university police would feel like a betrayal.—
Garrett Shanley,
Miami Herald,
23 May 2025
-
In the aftermath, Mahnaz will be forced to confront betrayal and loss, and to embark on a quest for justice.—
Baz Bamigboye,
Deadline,
22 May 2025
Noun
-
In the court of public opinion, any credible allegation of drug use, adultery or moral misstep is typically perceived as career-ending.—
Patrick Brzeski,
HollywoodReporter,
21 May 2025
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Mlotek’s title presumably comes from no-fault divorce laws, which did away with the idea that divorce required proof of wrongdoing, such as abuse or adultery.—
Hannah Jocelyn,
New Yorker,
26 Mar. 2025
Adjective
-
The cooling system in her second-story apartment in Albuquerque, New Mexico, had always been unreliable.—
Ignacio Calderon,
USA Today,
21 May 2025
-
This showed that changes in the truck's speed produced turbulence in the liquid helium, making measurements of its presence unreliable.—
John Timmer,
ArsTechnica,
19 May 2025
Noun
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Press play below to learn more about Wells’ treachery, and to get a sneak peek at the fugitive interacting with her latest target.—
Matt Webb Mitovich,
TVLine,
7 Apr. 2025
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Sinners is one of the great vampire movies of the modern age, mining the legend of these perpetual outsiders who desperately yearn to belong, but whose silky promises are rooted in treachery.—
Stephanie Zacharek,
Time,
29 Apr. 2025
Noun
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When an instance of misconduct is alleged and the investigation begins to make some headway, the police or corrections officer might quit or retire.—
Kevin Rennie,
Hartford Courant,
24 May 2025
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Baldwin also faced an involuntary manslaughter charge in connection with Hutchins’ death, but a judge dismissed the case in the middle of trial last summer due to prosecutorial misconduct and evidence suppression.—
Jessica Schladebeck,
New York Daily News,
24 May 2025
Adjective
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The decision to deploy Dembele as a false nine for a 3-1 home win over Lyon in mid-December proved the spark for a stupendous run of goal-scoring form in which the France international racked up 27 goals in only 22 appearances.—
Tom Williams,
New York Times,
30 May 2025
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Their accountant filed two false corporate tax returns, claiming one of the couple’s firms earned no money in 2015 and 2016.—
Howard Gleckman,
Forbes.com,
30 May 2025
Cite this Entry
“Unfaithful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithful. Accessed 5 Jun. 2025.
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