1
as in clandestine
undertaken or done so as to escape being observed or known by others
an underground operation to smuggle ancient artifacts out of the country
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in subterranean
being, situated, or operating beneath the surface of the earth
an underground shopping mall that is part of the city's subway system
Synonyms & Similar Words
Antonyms & Near Antonyms
as in resistance
a secret organization in a conquered country fighting against enemy forces
joined the underground while still a teenager
Synonyms & Similar Words
as in undercover
Synonyms & Similar Words
Antonyms & Near Antonyms
Examples Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of underground
David Faris, Newsweek, 4 Nov. 2024
It is feared that inside some of the vehicles that were washed away or trapped in underground garages there could be bodies waiting to be recovered.
—Hernán Muñoz and Joseph Wilson, Los Angeles Times, 5 Nov. 2024
Katie Fehrenbacher, Axios, 15 Oct. 2024
Instead, Weilerstein seems to serve as part of the weird Mayan underground, with its mysterious gods and beasts.
—Mark Swed, Los Angeles Times, 12 Oct. 2024
Chris Hawes, CNBC, 3 Nov. 2024
What’s important is happening underground as the roots get established.
—Jeanette Marantos, Los Angeles Times, 1 Nov. 2024
See all Example Sentences for underground 
Adjective
Julie Range, a policy manager for Commission Shift, an oil and gas watchdog group, commended the commission's request and called for a more rigorous review process for injection wells that contribute to underground pressure and exacerbate well failures.
—David Faris, Newsweek, 4 Nov. 2024
It is feared that inside some of the vehicles that were washed away or trapped in underground garages there could be bodies waiting to be recovered.
—Hernán Muñoz and Joseph Wilson, Los Angeles Times, 5 Nov. 2024
Noun
The company has amassed a war chest to lead the hunt for naturally-occurring hydrogen underground.
—Katie Fehrenbacher, Axios, 15 Oct. 2024
Instead, Weilerstein seems to serve as part of the weird Mayan underground, with its mysterious gods and beasts.
—Mark Swed, Los Angeles Times, 12 Oct. 2024
Adverb
Charm Industrial, one of the fund’s investments, promises to remove 112,000 metric tons of CO2 within six years by converting agricultural waste into oil that can be pumped underground.
—Chris Hawes, CNBC, 3 Nov. 2024
What’s important is happening underground as the roots get established.
—Jeanette Marantos, Los Angeles Times, 1 Nov. 2024
See all Example Sentences for underground
Recent Examples of Synonyms for underground
Adjective
-
Congress in recent years has been hot on the UAP trail, as a bipartisan but still somewhat fringe-y coalition of lawmakers has held hearings and applied pressure on other government entities to release information, particularly about any clandestine programs using taxpayer money.Tribune News Service, The Mercury News, 14 Nov. 2024
-
The premise hinges on the idea that China is Mexico’s number-one oil buyer — formidable leverage for the mysterious Chinese agent’s clandestine plot.Andy Andersen, Vulture, 28 Oct. 2024
Adjective
-
There would be subterranean and above-ground parking, and at least 20% of the units are expected to be designated as affordable with subsidized rents.Roger Vincent, Los Angeles Times, 2 Nov. 2024
-
An upscale hotel and spa — featuring a juice bar and multiple subterranean pools — is set to open on NE Alberta Street with spa services coming this month and the hotel opening next year.Axios Portland, Axios, 1 Nov. 2024
Noun
-
In 2016, more than 80 percent of Taiwanese people believed that resistance in a potential conflict with China would be futile; by 2022, the proportion of the population expressing this view had nearly halved to 43 percent.David Sacks, Foreign Affairs, 8 Nov. 2024
-
Ras Al Khaimah was previously best known for pearl-diving, its ceramics business and a sweeping mountain range with a 3,000 year-old fort which was the last line of resistance against British forces in 1819.Caroline Reid, Forbes, 5 Nov. 2024
Adjective
-
Skyler Philippi, of Columbia, Tenn., spent months in communication with undercover federal agents, planning a drone explosion that would have left thousands without power days before the general election.Ashleigh Fields, The Hill, 5 Nov. 2024
-
Philippi was arrested on Nov. 2 by undercover agents acting as co-conspirators who had agreed to be lookouts.Patrick Smith, NBC News, 5 Nov. 2024
Adjective
-
In a classified assessment prepared in early October, U.S. intelligence agencies concluded that Russia, which favors Donald Trump, and Iran, which prefers Kamala Harris, were both plotting covert propaganda campaigns to sow post-election discord over the vote counting.The New Yorker, The New Yorker, 5 Nov. 2024
-
For this covert theft, cybercriminals need backdoor access to your site.Alex Vakulov, Forbes, 31 Oct. 2024
Adjective
-
In late September, Gov. Gavin Newsom signed legislation to establish a new medical school with public and private funding in Kern County, which spans Bakersfield and the southern Central Valley.Sally C. Pipes, The Mercury News, 6 Nov. 2024
-
Moreover, the net ban is protected by the constitution already, similar to private property rights.Natalie Krebs, Outdoor Life, 6 Nov. 2024
Thesaurus Entries Near underground
Cite this Entry
“Underground.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underground. Accessed 22 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share