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
Tea is approached by PET and tasked with infiltrating the criminal empire of Miran, a ruthless criminal posing as a businessman.
—
Allison Degrushe, Entertainment Weekly, 30 Oct. 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
Nature infects everything, from the woodland murk that surrounds the town to the insects infiltrating Josie’s life, and Amor writes about it all with equal beauty and grotesquerie.
—Neil McRobert, Vulture, 16 Oct. 2025
Continue reading … COZY CONNECTIONS – Mamdani hands big check to radical group boasting about infiltrating his campaign.
—FOXNews.com, 8 Oct. 2025
This cannot be accomplished without infiltrating and taking over the PLO, something Hamas has never managed to do.
—Hussein Ibish, The Atlantic, 1 Oct. 2025
Alex’s reporting on the lobbyists infiltrating the climate summit ticked off an oil exec whose company takes out a lot of advertising on UBN.
—Kimberly Roots, TVLine, 1 Oct. 2025
But at a time when American moms are reaching their breaking point—and right-wing values are infiltrating the mainstream—is the choice to lean out of the workforce a radical new form of feminism or a regressive return to an outdated social system?
—Stephanie McNeal, Glamour, 23 Sep. 2025
Allison Degrushe, Entertainment Weekly, 30 Oct. 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
Nature infects everything, from the woodland murk that surrounds the town to the insects infiltrating Josie’s life, and Amor writes about it all with equal beauty and grotesquerie.
—Neil McRobert, Vulture, 16 Oct. 2025
Continue reading … COZY CONNECTIONS – Mamdani hands big check to radical group boasting about infiltrating his campaign.
—FOXNews.com, 8 Oct. 2025
This cannot be accomplished without infiltrating and taking over the PLO, something Hamas has never managed to do.
—Hussein Ibish, The Atlantic, 1 Oct. 2025
Alex’s reporting on the lobbyists infiltrating the climate summit ticked off an oil exec whose company takes out a lot of advertising on UBN.
—Kimberly Roots, TVLine, 1 Oct. 2025
But at a time when American moms are reaching their breaking point—and right-wing values are infiltrating the mainstream—is the choice to lean out of the workforce a radical new form of feminism or a regressive return to an outdated social system?
—Stephanie McNeal, Glamour, 23 Sep. 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.—
CBS News,
CBS News,
6 Jan. 2026
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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.—
Rachel Burchfield,
InStyle,
31 Dec. 2025
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.—
Jessie Yeung,
CNN Money,
26 Dec. 2025
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The Justice Department argued that the judge had overstepped his authority by inserting himself into questions of foreign policy.—
NPR Washington Desk,
NPR,
22 Dec. 2025
Verb
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The program’s pulse felt faint, its identity slipping further with each loss.—
Ira Gorawara,
New York Times,
9 Nov. 2025
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The Buffs dropped their third game in a row at Milan Puskar Stadium, falling 29-22 against the Mountaineers and slipping to 3-7 on a lost season.—
Sean Keeler,
Denver Post,
8 Nov. 2025
Verb
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Manhattan’s urban grid disappears among the winding paths and dense foliage of Central Park.—
Katie James Watkinson,
Condé Nast Traveler,
7 Jan. 2026
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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.—
Lauren Dana Ellman,
Travel + Leisure,
6 Jan. 2026
Cite this Entry
“Infiltrating.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infiltrating. Accessed 11 Jan. 2026.
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