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
None of that makes up for the suffering he’s caused; Lizzie’s death not only laid bare the threat his treachery had always posed to his colleagues, but also robbed him of a person who might have been the love of his life.
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Judy Berman, Time, 20 Oct. 2025
And when the surviving crew interrogates the android Ash about his treachery, the book has him pretty much spill the space beans.
—Daniel Dockery, Vulture, 22 Sep. 2025
When does compromise become treachery or defeat?
—Literary Hub, 3 Sep. 2025
Could Juno be behind this treachery, as payback for David destroying her spy corporation and for changing his oldest daughter into a killer?
—Demetrius Patterson, HollywoodReporter, 27 Aug. 2025
See All Example Sentences for treachery
Recent Examples of Synonyms for treachery
Noun
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In June 2025, Peacock revealed the latest slate of celebrities set to battle it out in a high-stakes game of lies, alliances and betrayal inside a castle in the Scottish Highlands — all for a chance to win up to $250,000.—
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Rumors of treason, incompetence and betrayal swirled.—
Noun
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Rumors of treason, incompetence and betrayal swirled.—
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His Administration has also accused political rivals, including Democratic lawmakers and former President Barack Obama, of sedition and treason.—
Cite this Entry
“Treachery.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treachery. Accessed 13 Jan. 2026.
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