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
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of undercover
Rosalio Ahumada, Sacramento Bee, 7 Feb. 2025
The Homeland Security investigation began in October 2023 and used an undercover agent and a confidential informant, according to the document.
—Joe Marusak, Charlotte Observer, 6 Feb. 2025
Jessica Radloff, Glamour, 8 Sep. 2023
The documentary is a first time collaboration between ABC News Studios and the Associated Press following a former Army sniper undercover inside the KKK.
—ABC News, 30 Apr. 2023
See All Example Sentences for undercover
Adjective
During the investigation, undercover law enforcement officers made purchases of meth and guns at stash houses in Sacramento.
—Rosalio Ahumada, Sacramento Bee, 7 Feb. 2025
The Homeland Security investigation began in October 2023 and used an undercover agent and a confidential informant, according to the document.
—Joe Marusak, Charlotte Observer, 6 Feb. 2025
Noun
Back at the hospital Jack tells Brady that working undercover took a lot of courage.
—Jessica Radloff, Glamour, 8 Sep. 2023
The documentary is a first time collaboration between ABC News Studios and the Associated Press following a former Army sniper undercover inside the KKK.
—ABC News, 30 Apr. 2023
See All Example Sentences for undercover
Recent Examples of Synonyms for undercover
Adjective
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Brendan Marks and Matt Baker uncovered documents that illustrate North Carolina’s clandestine research into conference realignment.—
Chris Branch,
The Athletic,
12 Feb. 2025
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This defiant and entertaining work playfully uses headshots and avatars to visualize clandestine audio recordings documenting years of Kafkaesque impositions, threats, and vital dissident art.—
Samantha Bergeson,
IndieWire,
10 Feb. 2025
Adjective
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Unlike covert narcissists, who mask their behavior with self-pity, grandiose narcissists rely on charm and manipulation to thrive.—
Julianna Bragg,
CNN,
20 Feb. 2025
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Experts are alarmed that the cuts could leave the United States defenseless against covert foreign influence operations and embolden foreign adversaries seeking to disrupt democratic governments.—
Steven Lee Myers,
New York Times,
20 Feb. 2025
Noun
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First came Witness by the American journalist Whittaker Chambers, a former communist and Soviet spy who eventually broke with the party and became a political conservative.—
Michael Kimmage,
Foreign Affairs,
25 Feb. 2025
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The titular protagonist is a former military spy turned maverick detective and, importantly, bookshop owner.—
Jamie Lang,
Variety,
25 Feb. 2025
Adverb
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The entire operation runs almost solely on paper, each retirement file hand-processed by hundreds of workers in a limestone mine 230 feet underground who ferry pieces of paper between the caverns to put them in the right manila folder.—
Zeynep Tufekci,
The Mercury News,
25 Feb. 2025
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At one point when working in the field, Groat and his team discovered an object buried underground.—
Carolyn Stein,
Chicago Tribune,
21 Feb. 2025
Adjective
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Obsidian, for one, had a secret staircase that led to the study and a sunken lounge on the main deck.—
Nicole Hoey,
Robb Report,
28 Feb. 2025
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Berlin is a city in a nearly hysterical hunt for secret Nazis believed to be lurking in the shadows.—
Timothy Nerozzi,
Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government,
28 Feb. 2025
Noun
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So the big reveal on the Epstein Files is that SOME of them were given to a group of right-wing social media operatives?—
Dan Perry,
Newsweek,
28 Feb. 2025
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After being asked by the FBI employee, Pang also agreed to provide two US military uniforms for operatives to wear inside the base during the attack, and a cell phone that could be used as a test for a detonator, court documents say.—
Dalia Faheid,
CNN,
28 Feb. 2025
Adjective
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The top official of the Social Security Administration quit over the weekend after Elon Musk's Department of Government Efficiency sought access to sensitive records containing the private information of Americans, according to a source familiar with the dispute.—
Joey Garrison,
USA TODAY,
19 Feb. 2025
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In recent years, UC San Diego has invested considerable resources into bridging the gap between academia and private industry.—
Natallie Rocha,
San Diego Union-Tribune,
18 Feb. 2025
Noun
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Caro Quintero was released when a court overturned his 40-year sentence for the 1985 kidnapping and killing of DEA agent Camarena.—
Greg Wehner,
Fox News,
28 Feb. 2025
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The show follows a Secret Service agent caught in a web of conspiracy after the U.S. president is assassinated, with no suspect in sight.—
Brittney Melton,
NPR,
28 Feb. 2025
Cite this Entry
“Undercover.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercover. Accessed 3 Mar. 2025.
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