as in sneaking
to introduce in a gradual, secret, or clever way
over time, undercover agents infiltrated the crime ring and eventually busted their gambling racket
Synonyms & Similar Words
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Example Sentences
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Recent Examples of infiltrating
Hannah cares for a charming high school athlete while working with Charlie to cover their tracks by infiltrating the hospital computer system.
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Randall Colburn, Entertainment Weekly, 5 Jan. 2026
As early as 2019, Fuentes spoke to his followers about infiltrating the right by blending in with the rest of the GOP.
—Ali Breland, The Atlantic, 13 Dec. 2025
Or from infiltrating the ‘free economic zone’ under the guise of ‘civilians’ and taking control of it?
—Ellen Mitchell, The Hill, 12 Dec. 2025
Or from infiltrating the ‘free economic zone’ under the guise of ‘civilians’ and taking control of it?
—Christian Edwards, CNN Money, 11 Dec. 2025
Hackers leveraging malware systems and other cybercriminal tools are infiltrating online freight marketplaces to make off with high-value cargo while items are in transit.
—Julia Bonavita, FOXNews.com, 8 Dec. 2025
Meanwhile, the same forces that have undermined human vaccination — politicization, misinformation, distrust — are infiltrating veterinary care.
—Henry I. Miller, Boston Herald, 25 Nov. 2025
Billitier did have a hell of a story to tell about his decades of undercover work for the FBI, including several years infiltrating a Colombian drug ring in Texas.
—Steve Belanger, HollywoodReporter, 23 Oct. 2025
Even with fewer boaters on the water, the threat of aquatic nuisance species infiltrating your favorite lake remains.
—Arkansas Online, 21 Oct. 2025
Recent Examples of Synonyms for infiltrating
Verb
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That's fine by Rodgers, who knows a thing or two about sneaking in the playoffs and going on a run.—
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Harry proposed 10 months later in November 2017, and the couple spent their first Sandringham Christmas together the next month before sneaking away to the French Riviera for New Year’s 2018.—
Verb
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But even those who use TA say there’s something odd about inserting English letters in a sentence of Chinese characters.—
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The Justice Department argued that the judge had overstepped his authority by inserting himself into questions of foreign policy.—
Verb
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Cizikas scored a short-handed goal to tie it 3-3 late in the second period, completing a 2-on-1 rush with Holmstrom by slipping the puck between Gustavsson's pads.—
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To keep a tension rod from slipping, look for rods that have rubber stoppers on the ends or that come with sticky wall brackets.—
Verb
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Manhattan’s urban grid disappears among the winding paths and dense foliage of Central Park.—
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For the youngest visitors, the Castle of Dreams—a two-story sandcastle complete with a winding slide and ambient sound—is a must.—
Cite this Entry
“Infiltrating.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infiltrating. Accessed 13 Jan. 2026.
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