as in betrayal
the act or fact of violating the trust or confidence of another
was furious that she revealed his secret and never forgave her for the treachery
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Recent Examples of treachery
Perfidy — from the French perfidie via the Latin perfidia — means deceitfulness, treachery or a breach of faith or promise.
—
Harmeet Kaur, CNN Money, 21 Jan. 2026
But despite all this, not every Chelsea fan outside his family will regard this transfer as treachery.
—Simon Johnson, New York Times, 17 Jan. 2026
With season 4 rapidly approaching, now's the time to prepare for the treachery to come.
—Randall Colburn, Entertainment Weekly, 22 Dec. 2025
Instead of being killed, Ashur takes Spartacus’ life and is consequently rewarded for his treachery by the Roman Empire.
—Aramide Tinubu, Variety, 1 Dec. 2025
See All Example Sentences for treachery
Harmeet Kaur, CNN Money, 21 Jan. 2026
But despite all this, not every Chelsea fan outside his family will regard this transfer as treachery.
—Simon Johnson, New York Times, 17 Jan. 2026
With season 4 rapidly approaching, now's the time to prepare for the treachery to come.
—Randall Colburn, Entertainment Weekly, 22 Dec. 2025
Instead of being killed, Ashur takes Spartacus’ life and is consequently rewarded for his treachery by the Roman Empire.
—Aramide Tinubu, Variety, 1 Dec. 2025
See All Example Sentences for treachery
Recent Examples of Synonyms for treachery
Noun
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The streamer said the drama will show how the couple’s love, betrayals and artistic work were shaped by the political and social atmosphere of the time.—
Stewart Clarke,
Deadline,
12 Mar. 2026
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While at the convent, Willa learned about her mother's betrayal, and now Bob wants to be fully honest with her.—
Randall Colburn,
Entertainment Weekly,
11 Mar. 2026
Noun
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Current law says only those accused of murder or treason can have bail withheld, but this language expands that possibility to other offenses, such as misdemeanors.—
Kayla Dwyer,
IndyStar,
6 Mar. 2026
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While Machar is currently on trial for offenses including treason, fighting has intensified in areas seen as his strongholds, where government troops are trying to disperse the rebels.—
ABC News,
ABC News,
6 Mar. 2026
Cite this Entry
“Treachery.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treachery. Accessed 14 Mar. 2026.
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