1
as in clandestine
undertaken or done so as to escape being observed or known by others
an undercover operation to infiltrate the terrorist organization
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
as in spy
a person who tries secretly to obtain information for one country in the territory of another usually unfriendly country
within the city was a well-organized fifth column, and these undercovers would make themselves known as soon as the invading forces breached the city limits
Synonyms & Similar Words
as in underground
Related Words
Dissimilar Words
Example Sentences
Examples are automatically compiled from online sources to
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Recent Examples of undercover
Taylor Ardrey, USA Today, 15 May 2026
Police conducted undercover operations at the business over several months, records said.
—Jeff A. Chamer
may 15, Charlotte Observer, 15 May 2026
Martin Suarez, Rolling Stone, 13 Sep. 2025
Masks were once largely forbidden on the federal level unless an agent was working undercover, said Michael Bouchard, a former assistant director at the Bureau of Alcohol, Tobacco Firearms and Explosives who retired in 2007.
—Byron Tau, Chicago Tribune, 30 Aug. 2025
See All Example Sentences for undercover
Adjective
Off the heels of a miscarriage, Coltrane and his wife dream of a normal life outside of their undercover thieving and scheming.
—Taylor Ardrey, USA Today, 15 May 2026
Police conducted undercover operations at the business over several months, records said.
—Jeff A. Chamer
may 15, Charlotte Observer, 15 May 2026
Noun
Four other agents accompanied me, all also operating undercover.
—Martin Suarez, Rolling Stone, 13 Sep. 2025
Masks were once largely forbidden on the federal level unless an agent was working undercover, said Michael Bouchard, a former assistant director at the Bureau of Alcohol, Tobacco Firearms and Explosives who retired in 2007.
—Byron Tau, Chicago Tribune, 30 Aug. 2025
See All Example Sentences for undercover
Recent Examples of Synonyms for undercover
Adjective
-
But in the current political climate, clandestine behaviors could win out.—
Robin George Andrews,
Scientific American,
19 May 2026
-
These relations are not based on secrecy or clandestine arrangements.—
Emma Bussey,
FOXNews.com,
17 May 2026
Adjective
-
More details about the Cavs/The Realest partnership To ensure authenticity, The Realest oversees every collectible item to have patent-pending covert markings and tamper resistant holograms.—
Mark Medina,
Forbes.com,
23 May 2026
-
The sizable bridal party took some work and covert planning.—
Rosemary Feitelberg,
Footwear News,
20 May 2026
Noun
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Marrakchi, who has also directed episodes of such TV series as French spy thriller The Bureau and Damien Chazelle’s The Eddy, returns to Cannes’ Un Certain Regard program, where her 2005 feature debut Marock, about a Muslim-Jewish romance in Casablanca, also premiered.—
Georg Szalai,
HollywoodReporter,
14 May 2026
-
Cuban officials later confirmed the spy director's visit in an official statement.—
Nick Penzenstadler,
USA Today,
14 May 2026
Adverb
-
At least eight people are dead and 38 others are trapped underground after a gas explosion in a coal mine in northeast China’s Shanxi province on Friday night, according to state media.—
Hira Humayun,
CNN Money,
22 May 2026
-
The agency initially reported early Saturday eight people were killed and 38 were trapped underground.—
ABC News,
ABC News,
22 May 2026
Adjective
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Get Ready: Katy Perry Has Released a Sneak Peek of Her New Song And the internet has receipts.—
Mehera Bonner,
Marie Claire,
15 Mar. 2017
Adjective
-
The secret dinner series, founded by Alexandria Ott, brings together collaboration with chefs for unique dining experiences.—
Carlos Rico,
San Diego Union-Tribune,
20 May 2026
-
Zúñiga was part of the secret negotiating team that struck a deal with Cuban officials, including Raul Castro’s son, to restore diplomatic ties during the Obama administration.—
Patrick Oppmann,
CNN Money,
20 May 2026
Noun
-
Henry Cavill, Jake Gyllenhaal and Eiza González star in the film about a team of elite operatives on an impossible mission.—
ABC News,
ABC News,
17 May 2026
-
Republican Kandiss Taylor has filed to run for the seat, but her past political runs have led operatives to rule her out as a serious candidate.—
Claire Carter,
The Washington Examiner,
16 May 2026
Adverb
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Haslach also admitted to surreptitiously taking a photo of a minor in a swimsuit by positioning his cellphone under a classroom desk.—
Nick Ferraro,
Twin Cities,
1 May 2026
-
Sometimes the batteries on the trackers would run low, and McGovern’s team would need to remove and recharge the devices, before surreptitiously replacing them.—
Ed Caesar,
New Yorker,
30 Apr. 2026
Cite this Entry
“Undercover.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercover. Accessed 26 May. 2026.
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