1
as in infidelity
lack of faithfulness especially to one's husband or wife
he eventually forgave his wife's unfaithfulness
Synonyms & Similar Words
Relevance
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
Recent Examples of Synonyms for unfaithfulness
Noun
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The post was accompanied by a series of hashtags that included #divorce, #cheating and #infidelity.—
The Athletic MLB Staff,
New York Times,
21 June 2025 -
Creators shared videos about pregnancy horror stories, infidelity and threats of domestic violence, opening up a conversation about how young people use humor as a coping mechanism to talk about traumatic events.—
Rachel Hale,
USA Today,
19 June 2025
Noun
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The tricky thing is that the Jackal, across the 10 episodes, does despicable acts of violence and betrayal in order to achieve his goal.—
Ryan Fleming,
Deadline,
19 June 2025
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Better to categorize Lacey’s latest as its own genre, a category-defining, creative, thought-provoking piece of literature on loss, betrayal, friendships, faith, and more….Unlike life, there is no beginning or end, just a story that follows its own strange, wild, and mesmerizing pattern.—
Gabrielle Bellot,
Literary Hub,
17 June 2025
Noun
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Every look with such an irregular desire is in our Savior’s opinion a virtual adultery. . . .—
Merve Emre,
New Yorker,
16 June 2025
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The sixth commandment in Catholic teaching prohibits adultery.—
Ruth Graham,
New York Times,
22 May 2025
Noun
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The six-parter, to debut July 14, follows six groups of friends, and six historical cases of murder and treachery among them.—
Etan Vlessing,
HollywoodReporter,
19 June 2025
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But amid the bloodbaths and treacheries, Westeros still penciled in time for a little romance — some more compelling than others (Jon and Ygritte > Jon and Daenerys).—
Tyler Aquilina,
EW.com,
17 Apr. 2025
Noun
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Several officers who either pleaded guilty or were convicted by a jury for their role in the corruption scheme had their felony convictions tossed out in favor of misdemeanors amid allegations of prosecutorial misconduct.—
Alex Riggins,
San Diego Union-Tribune,
18 June 2025
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Judge Subramanian also noted there was no evidence of prosecutorial misconduct.—
Lauryn Overhultz , Maria Paronich,
FOXNews.com,
18 June 2025
Noun
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Hichilema was accused of treason after his motorcade failed to give way to Lungu’s presidential convoy.—
Jacob Zimba,
Los Angeles Times,
20 June 2025
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Notable Tanzanian opposition leader Tundu Lissu is set to represent himself in his treason trial after being denied the right to a private meeting with his lawyers.—
Yinka Adegoke,
semafor.com,
18 June 2025
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Cite this Entry
“Unfaithfulness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfaithfulness. Accessed 2 Jul. 2025.
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