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
Jesse Whittock, Deadline, 29 Oct. 2025
The Attorney’s Office said those undercover operations also determined undocumented people attended the horse track races, which regularly saw 250-500 attendees.
—Sally Krutzig, Idaho Statesman, 29 Oct. 2025
Time, 13 Aug. 2025
Meanwhile, the police send in state trooper Billy Costigan (DiCaprio) undercover to infiltrate Costello’s crime organization.
—Erik Kain, Forbes.com, 1 Aug. 2025
See All Example Sentences for undercover
Adjective
Pic follows the young protégé of a legendary crime boss, secretly an undercover cop, who is executed before revealing a file that exposes the city’s entire web of corruption.
—Jesse Whittock, Deadline, 29 Oct. 2025
The Attorney’s Office said those undercover operations also determined undocumented people attended the horse track races, which regularly saw 250-500 attendees.
—Sally Krutzig, Idaho Statesman, 29 Oct. 2025
Noun
He is aided by Yasir Abbas, a weapons specialist; Raghuveer Singh, a sniper who served in Kashmir and Tawang; Uday Bhan, an explosives expert; and Sukhbir Singh, an Indian agent undercover in Pakistan posing as a Karachi stockbroker.
—Time, 13 Aug. 2025
Meanwhile, the police send in state trooper Billy Costigan (DiCaprio) undercover to infiltrate Costello’s crime organization.
—Erik Kain, Forbes.com, 1 Aug. 2025
See All Example Sentences for undercover
Recent Examples of Synonyms for undercover
Adjective
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The evil-doing in question is simple enough, at least for a franchise that has always been built around the existence of a clandestine organization of magicians (The Eye) who love using their skills to take down bad guys and quite literally share the wealth with their eager audiences.—
Kate Erbland,
IndieWire,
11 Nov. 2025
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The 16-month plot to bribe Maduro’s chief pilot illustrates how Washington pairs clandestine operations with military power to destabilize the regime while projecting strategic pressure in the region.—
Amir Daftari,
MSNBC Newsweek,
29 Oct. 2025
Adjective
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However, his team quickly secured their covert support in the form of money and supplies.—
Literary Hub,
Literary Hub,
7 Nov. 2025
-
Trump has authorized the Central Intelligence Agency (CIA) to carry out covert operations in the country and has left the door firmly open to unspecified land operations.—
Ellie Cook,
MSNBC Newsweek,
5 Nov. 2025
Noun
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Netanyahu said the country would continue trying to bring home the bodies of Israelis still being held across enemy lines, such as Eli Cohen, an Israeli spy hung in Damascus in 1965.—
NPR,
NPR,
9 Nov. 2025
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And lately, Prime’s recommendations algorithm seems to have taken a shine to it — perhaps mistaking it for a sharp spy game as its human predecessors did, or perhaps not.—
Claire McNear,
Rolling Stone,
8 Nov. 2025
Adverb
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There are also environmental concerns that even if radiation is contained underground, the shaking would be enough to damage buildings near the site.—
NPR,
NPR,
31 Oct. 2025
-
Such a test would likely occur underground in Nevada.—
Davis Winkie,
USA Today,
30 Oct. 2025
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
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Large software wallets explicitly derive all accounts from a secret recovery phrase, underscoring how central the model is in everyday use.—
Wyles Daniel,
USA Today,
6 Nov. 2025
-
The Heeler family home is recreated in uncanny detail—from Bandit’s armchair to the backyard barbecue—with interactive games (led by a cheeky garden gnome named Rhonda), music, and secret nooks that delight kids and grown-ups.—
Alli Forde,
Travel + Leisure,
6 Nov. 2025
Noun
-
Muhammad Ali Hadid, a senior member of Hezbollah’s elite Radwan Force, was eliminated in Nabatieh, while another operative was struck in Ayta ash Shab after being seen collecting intelligence on Israeli positions.—
Efrat Lachter,
FOXNews.com,
4 Nov. 2025
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Seasoned political operatives and experienced business executives Steve Silverman and Carrie Goux will lead the Washington office.—
Borys Kit,
HollywoodReporter,
30 Oct. 2025
Adverb
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In a video shared Monday to the official TikTok account of Hobbiton, the charming Matamata, New Zealand, set that Wood's Frodo Baggins called home in Peter Jackson's acclaimed film trilogy, Wood surreptitiously arrives with a small armada of camera operators to document the surprise.—
Ryan Coleman,
Entertainment Weekly,
28 Oct. 2025
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The manager of Vladimir Kramnik’s opponent in that title match, Veselin Topalov, claimed the Russian was using the bathroom up to 50 times per match to surreptitiously look up chess moves on a computer — a charge that Kramnik’s manager hotly denied.—
Corky Siemaszko,
NBC news,
26 Oct. 2025
Cite this Entry
“Undercover.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercover. Accessed 14 Nov. 2025.
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