1
as in dense
impossible to get through or into
the wall of security people surrounding the rock band was impermeable
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in tight
not allowing penetration (as by gas, liquid, or light)
an impermeable seal on the ancient tomb had preserved the artifacts exceptionally well
Synonyms & Similar Words
Antonyms & Near Antonyms
Example 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 impermeable
Achieving that often meant forgoing impermeable materials and permanent designs, which stands in stark contrast to the way modern-day water management works are constructed.
—
Ari Caramanica, The Conversation, 8 Apr. 2025
Taxing cruise ships with foreign flags seems like a simple concept, like building an impermeable border wall.
—Roger Dooley, Forbes, 22 Feb. 2025
The impermeable bottom layer is deep in some areas – close to 600 feet – and shallow in others – like 50 feet.
—Daniel Desrochers, Kansas City Star, 16 Jan. 2025
As Hurricane Milton is expected to bring record-breaking storm surge yet again to the region, the hospital -- located on the bay near downtown Tampa -- is surrounded by the water-impermeable barrier once more.
—Meredith Deliso, ABC News, 9 Oct. 2024
See All Example Sentences for impermeable
Ari Caramanica, The Conversation, 8 Apr. 2025
Taxing cruise ships with foreign flags seems like a simple concept, like building an impermeable border wall.
—Roger Dooley, Forbes, 22 Feb. 2025
The impermeable bottom layer is deep in some areas – close to 600 feet – and shallow in others – like 50 feet.
—Daniel Desrochers, Kansas City Star, 16 Jan. 2025
As Hurricane Milton is expected to bring record-breaking storm surge yet again to the region, the hospital -- located on the bay near downtown Tampa -- is surrounded by the water-impermeable barrier once more.
—Meredith Deliso, ABC News, 9 Oct. 2024
See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
Adjective
-
Where the Earth has a dense atmosphere, abundant water and life, Mars is a desiccated, lifeless world where even the prospects of finding fossil bacteria are a long shot.—
New Atlas,
New Atlas,
12 July 2025
-
In the photo, the orange-brown tiers represent stardust, while small patches represent seemingly vacant zones that indicate the presence of dense foreground filaments of dust that are home to still-forming stars, astronomers said.—
Julia Jacobo,
ABC News,
11 July 2025
Adjective
-
Panda flipped this model, embedding itself directly in the grower network and building tight, regional supply chains.—
Kasi Martin,
Sourcing Journal,
9 July 2025
-
Rodman pulled her hair back into a tight bun and accessorized with delicate pieces of jewelry, including earrings, bracelets and rings.—
Julia Teti,
Footwear News,
9 July 2025
Adjective
-
The code also would set permeability requirements and expand the definition of artificial turf to include turf that is not 100% impervious.—
Pili Saravia,
Austin American Statesman,
2 July 2025
-
The data further reveal that Latino neighborhoods often have more impervious surfaces and older housing stock lacking modern cooling systems, both of which compound the risks of heat exposure.—
Marcos Magaña,
Los Angeles Times,
24 June 2025
Adjective
-
Lots of Rules, Lots of Cash Rules governing property and building codes are thick and can be incomprehensible to most homeowners.—
Andrew Wimer,
Forbes.com,
30 June 2025
-
Still the aftertaste of raspberry filling clings to her soft palate, as thick and heady and floral as menstrual blood.—
Carly Tagen-Dye,
People.com,
30 June 2025
Adjective
-
When selecting a provider, organizations should remember to look for one that offers robust data protection offerings that ensure the storage sets are impenetrable.—
Dave Friend,
Forbes.com,
27 June 2025
-
Built inside a mountain some 300 feet underground and reinforced by layers of concrete, the plant, which is the most likely target of a potential American strike, is impenetrable by any bomb except the GBU-57 Massive Ordnance Penetrator (MOP).—
Adeola Adeosun,
MSNBC Newsweek,
21 June 2025
Adjective
-
By this point, the road behind him was impassable, too.—
Rachel Monroe,
New Yorker,
11 July 2025
-
By that point, according to survivor accounts, many evacuation routes had been impassable for hours.—
Zeynep Tufekci,
Mercury News,
10 July 2025
Adjective
-
But a closer read shows the linguistic dance that big companies are engaged in.—
Liz Hoffman,
semafor.com,
10 July 2025
-
One of those options is St. Louis Cardinals closer Ryan Helsley.—
Drew VonScio,
MSNBC Newsweek,
10 July 2025
Adjective
-
Seek shelter in a sturdy structure until the storm has passed.—
NC Weather Bot,
Charlotte Observer,
13 July 2025
-
Photograph: Kat Merck AmazonBasics Small Packing Cubes for Travel, 4-Piece-Set $20 $14 (30% off) Amazon Not quite as compressive as our top pick, these Amazon Basics cubes offer sturdy mesh windows and durable fabric—a budget-friendly intro to packing cubes.—
Parker Hall,
Wired News,
11 July 2025
Cite this Entry
“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 17 Jul. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share