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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Recent Examples of treacherous
With treacherous weather hampering flights into Washington, a handful of House members on both sides of the aisle were forced to hit the road overnight to make it in time to vote on the bill.
—
Dave Goldiner, New York Daily News, 2 July 2025
In a striking contrast to the sweltering heat gripping much of the East Coast, a 55-year-old hiker from Texas was rescued in frigid and treacherous conditions Friday evening from the high peaks of New Hampshire's White Mountains.
—Sarah Rumpf-Whitten, FOXNews.com, 24 June 2025
Heavy rain forced the suspension of round 2, pushing unfinished play into Saturday and leaving the course even more treacherous.
—Devlina Sarkar, MSNBC Newsweek, 14 June 2025
At least three people were killed in the treacherous flood waters streaming through a mountain village in New Mexico, which also knocked an entire home from its foundations and then swept it away.
—Jessica Schladebeck, New York Daily News, 9 July 2025
See All Example Sentences for treacherous
Dave Goldiner, New York Daily News, 2 July 2025
In a striking contrast to the sweltering heat gripping much of the East Coast, a 55-year-old hiker from Texas was rescued in frigid and treacherous conditions Friday evening from the high peaks of New Hampshire's White Mountains.
—Sarah Rumpf-Whitten, FOXNews.com, 24 June 2025
Heavy rain forced the suspension of round 2, pushing unfinished play into Saturday and leaving the course even more treacherous.
—Devlina Sarkar, MSNBC Newsweek, 14 June 2025
At least three people were killed in the treacherous flood waters streaming through a mountain village in New Mexico, which also knocked an entire home from its foundations and then swept it away.
—Jessica Schladebeck, New York Daily News, 9 July 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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The world is not going to wait for the U.S. to hash out its chaos, and other countries are already moving to reorient parts of their manufacturing and trade schemes to circumvent an unreliable United States.—
New York Daily News Editorial Board,
New York Daily News,
3 Aug. 2025
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Issues such as unreliable Wi-Fi, slow booking processes or credit card processing failures drive guests to competitors.—
Mark Holzberg,
Forbes.com,
31 July 2025
Adjective
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Winfrey's spokesperson told Newsweek that these reports are false, and that the road will remain open as long as is necessary.—
Marni Rose McFall,
MSNBC Newsweek,
30 July 2025
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One of the things your piece says is that, essentially for the entire duration of the war, there’ve been false warnings about a hunger crisis.—
Isaac Chotiner,
New Yorker,
30 July 2025
Cite this Entry
“Treacherous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treacherous. Accessed 7 Aug. 2025.
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