as in treacherous
formal
causing harm in a way that is gradual or not easily noticed
Most people with this insidious disease have no idea that they are infected. an insidious enemy
Synonyms & Similar Words
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Antonyms & Near Antonyms
Examples Sentences
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Recent Examples of insidious
Regular consumption of the extra sugar in the drinks can lead to obesity, harm liver function and increase the risk of heart disease, hypertension and Type 2 diabetes, an especially insidious disease that can lead to blindness, amputations and premature death.
—
Andrew Jacobs, New York Times, 6 Jan. 2025
Unlike the visible opioid epidemic or the tangible tobacco wars of the 20th century, this crisis is just as insidious.
—Andrae Bailey, Orlando Sentinel, 5 Jan. 2025
While the postmortem and soul-searching are necessary, the tone and tenor of the blame game have begun to morph into something more insidious.
—Anthony D. Romero, Twin Cities, 6 Dec. 2024
One digital strategist at an independent record label worried that the problem could soon grow more insidious.
—Liz Pelly, Harper's Magazine, 2 Jan. 2025
See all Example Sentences for insidious 
Andrew Jacobs, New York Times, 6 Jan. 2025
Unlike the visible opioid epidemic or the tangible tobacco wars of the 20th century, this crisis is just as insidious.
—Andrae Bailey, Orlando Sentinel, 5 Jan. 2025
While the postmortem and soul-searching are necessary, the tone and tenor of the blame game have begun to morph into something more insidious.
—Anthony D. Romero, Twin Cities, 6 Dec. 2024
One digital strategist at an independent record label worried that the problem could soon grow more insidious.
—Liz Pelly, Harper's Magazine, 2 Jan. 2025
See all Example Sentences for insidious
Recent Examples of Synonyms for insidious
Adjective
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Moreover, the treacherous weather conditions also hampered efforts to fight the fires, as air crews were unable to operate due to strong gusts.—
Ned Kleiner,
Los Angeles Times,
10 Jan. 2025
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With a winter storm warning in effect and a mix of snow and ice falling in North Texas, roads in the Dallas-Fort Worth area could become treacherous around midday Thursday, Jan. 9, and into Friday.—
Amy McDaniel,
Fort Worth Star-Telegram,
9 Jan. 2025
Adjective
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Our favorite twist on the classic caramel corn recipe is to add espresso powder for a subtle coffee flavor.—
Sarah Martens,
Better Homes & Gardens,
13 Jan. 2025
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Cacio e pepe, with its Parmesan and black pepper, is more subtle.—
Lauryn Azu,
Chicago Tribune,
13 Jan. 2025
Adjective
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Of note: Your Content must not be false, defamatory, misleading or hateful, or infringe any copyright or any other third-party rights or otherwise be unlawful.—
New York Times,
New York Times,
19 Jan. 2025
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But instead of mounting a defense of free speech against a lawsuit and Trump’s accusations that the network said were false and completely without merit, Paramount is considering following the example of Disney and tech oligarchs who will line up at the inauguration like Mark Zuckerberg.—
Richard Lawler,
The Verge,
18 Jan. 2025
Adjective
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The Franklin County and River Valley Coalition recently accused officials of the Arkansas Development Finance Authority and a division of the building authority of being deceptive and called for an investigation.—
Alex Golden,
Axios,
6 Jan. 2025
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Penelope in the Odyssey says that dreams that pass through the gate of ivory are deceptive, while those that pass through the gate of horn are real.—
Matthew Wills,
JSTOR Daily,
4 Jan. 2025
Adjective
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Since then, Putin has sought instead to rally the public to the defense of a motherland besieged by the perfidious and cunning West.—
Leon Aron,
The Atlantic,
5 Dec. 2024
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And in this new era of Sino-Western rivalry, the Olympics are also used by more nationalistic elements of the Chinese media as a way to portray China in a positive light against the perfidious Americans and Europeans.—
Alexander Smith,
NBC News,
11 Aug. 2024
Adjective
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According to a recent Prosper Insights & Analytics survey, 30% of workers are concerned with AI hallucinations, which is when AI generates incorrect information as a result of poor training or inaccurate assumptions.—
Gary Drenik,
Forbes,
9 Jan. 2025
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Approximately 780,000 incorrect charges totaling over 2 billion forints ($5.43 million) in one night.—
Tommy Tuberville,
Newsweek,
9 Jan. 2025
Adjective
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The swindles also involved fake investments, phony sweepstakes, and tech support scams in which a person was contacted and told there was something wrong with their computer, which could be corrected for a fee.—
Emilie Le Beau Lucchesi,
Discover Magazine,
18 Jan. 2025
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The outlet reports that Puente would even continue to write letters to her tenants’ family members for months following their deaths in order to cover her tracks and lead the families to believe nothing was wrong.—
Sean Neumann,
People.com,
18 Jan. 2025
Thesaurus Entries Near insidious
Cite this Entry
“Insidious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insidious. Accessed 22 Jan. 2025.
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