as in traitorous
not true in one's allegiance to someone or something
a treacherous "friend," she's been known to turn against people in the blink of an eye
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Example Sentences
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Recent Examples of treacherous
First, as just discussed, the stock has repeatedly managed to hold near otherwise treacherous breakdown zones.
—
Frank Cappelleri, CNBC, 22 Oct. 2025
After a long and treacherous summer, basketball is finally back on full display, and four teams will kick off the season on Tuesday night, starting with the Oklahoma City Thunder and the Houston Rockets.
—Ricardo Klein, MSNBC Newsweek, 21 Oct. 2025
My Titleist ProV1x was waist-high on a treacherous side-hill lie.
—Gabby Herzig, New York Times, 9 Oct. 2025
When Hernán helps Julia and her young daughter, Maribel, navigate treacherous borderlands, their desperate journey triggers the wrath of a ruthless trafficking syndicate.
—Matt Grobar, Deadline, 7 Oct. 2025
See All Example Sentences for treacherous
Frank Cappelleri, CNBC, 22 Oct. 2025
After a long and treacherous summer, basketball is finally back on full display, and four teams will kick off the season on Tuesday night, starting with the Oklahoma City Thunder and the Houston Rockets.
—Ricardo Klein, MSNBC Newsweek, 21 Oct. 2025
My Titleist ProV1x was waist-high on a treacherous side-hill lie.
—Gabby Herzig, New York Times, 9 Oct. 2025
When Hernán helps Julia and her young daughter, Maribel, navigate treacherous borderlands, their desperate journey triggers the wrath of a ruthless trafficking syndicate.
—Matt Grobar, Deadline, 7 Oct. 2025
See All Example Sentences for treacherous
Recent Examples of Synonyms for treacherous
Adjective
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Clarisse looks intimidating climbing out of a boat, as does Bushnell’s traitorous Luke, who wields a sharp-looking knife.—
Dessi Gomez,
Deadline,
24 July 2025
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There's a delicious whodunit aspect to it, too, as the list of five potentially traitorous suspects includes the operative's own high-profile wife (Cate Blanchett).—
Brian Truitt,
USA Today,
4 July 2025
Adjective
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Cheaper options or knock-offs tend to come with flimsy sockets, buzzing ballasts, or unreliable switches, which can make rooms look cheap or dated far sooner than expected and even create fire hazards.—
Lauren Bengtson,
Better Homes & Gardens,
25 Oct. 2025
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More than a year post-merger, Six Flags still operates over 10 different apps, and even basic transactions like purchasing a season pass on the website have been unreliable, so modernizing and streamlining this technology could go a long way.—
Kenneth Squire,
CNBC,
24 Oct. 2025
Adjective
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Several residents who work in the Georgia King Village area weighed in on the incident, including Harriette Guity, who told News12 that false reports based on AI could stretch first responders thin.—
Kimberlee Speakman,
PEOPLE,
25 Oct. 2025
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Archaeologists concluded the structure was actually a false tomb, or a cenotaph, a type of burial monument erected to honor a deceased person buried elsewhere.—
Aspen Pflughoeft,
Miami Herald,
24 Oct. 2025
Cite this Entry
“Treacherous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treacherous. Accessed 29 Oct. 2025.
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