1
as in dense
impossible to get through or into
the ancient temple was surrounded by vast stretches of impenetrable jungle
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Antonyms & Near Antonyms
2
as in mysterious
being beyond one's powers to know, understand, or explain
the mysteries of that religion are completely impenetrable to outsiders
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3
as in incomprehensible
impossible to understand
the textbook's language is completely impenetrable, at least to me
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4
as in tight
not allowing penetration (as by gas, liquid, or light)
the container of toxic waste has an impenetrable seal to prevent leaks
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Example Sentences
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Recent Examples of impenetrable
Courtside, before a battle, Osaka’s deep colorways and the many translucent but somehow impenetrable layers of the vast floor-dragging skirt work as armor inspiring stone-cold dread in all prospective opponents.
—
Guy Martin,
Forbes.com,
1 June 2026
The starting back three of captain Tim Ream, Mark McKenzie and Freeman were not exactly impenetrable.
—
Kyle Feldscher,
CNN Money,
31 May 2026
Rake grounds into the upper soil layer to avoid creating an impenetrable mat on the soil surface.
—
Kim Toscano,
Southern Living,
31 May 2026
The Thunder’s perimeter defense sometimes feels impenetrable and is anchored on the back line by Chet Holmgren, one of the best rim protectors in basketball.
—
James L. Edwards Iii,
New York Times,
27 May 2026
See All Example Sentences for impenetrable
Guy Martin,
Forbes.com,
1 June 2026
The starting back three of captain Tim Ream, Mark McKenzie and Freeman were not exactly impenetrable.
—
Kyle Feldscher,
CNN Money,
31 May 2026
Rake grounds into the upper soil layer to avoid creating an impenetrable mat on the soil surface.
—
Kim Toscano,
Southern Living,
31 May 2026
The Thunder’s perimeter defense sometimes feels impenetrable and is anchored on the back line by Chet Holmgren, one of the best rim protectors in basketball.
—
James L. Edwards Iii,
New York Times,
27 May 2026
See All Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
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More memory, denser racks, faster deployment The new server promises 50 percent more memory per socket and more GPU memory compared to the previous generation.
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For ultimate comfort, the loveseat and chairs also include dense foam cushions wrapped in smooth polyester.
Adjective
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Beulah's spurned heir Joaquin (Juan Pablo Raba) calls up the mysterious Mariana (Raoul Max Trujillo) to help with his many problems, which include his ranch-usurping half-brother Rob-Will and those Duttons from Montana.
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Nicolas Winding Refn’s audacious return to feature filmmaking is a gorgeous, mysterious act of cinema, sensorial and transgressive, that demands to be experienced on its own terms.
Adjective
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There have been times when acts of atrocity have been going on — and gosh, some of those things are incomprehensible — yet humanity has found a way.
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Being joyful there — in the Dominican Republic, where small shacks and houses pieced together by junkyard scraps sometimes hold families with over a dozen members — seems incomprehensible.
Adjective
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With life spent largely on transit, navigating tight layovers, and using their days off to jet-set across the globe, flight attendants have mastered the art of packing.
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Polls overall anticipate a tight race, including a June 19 survey by the news site Zeteo showing DeGette trailing Kiros 41% to 36%.
Adjective
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Overloading Your Washer Even the softest of towels are not impervious to improper laundering, and overloading your washer or using too little water can affect how thoroughly the towels are washed.
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Crafted from durable high-density polyethylene, these Adirondack chairs are resistant to corrosion and impervious to the elements.
Adjective
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His doctors speculated his infection might have been a rare case of cryptic transmission from sharing meals and bathrooms with his coworkers, one of whom apparently had a tapeworm infection.
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The Drama stirred debate on social media over its cryptic marketing campaign that did not directly divulge the main focus of the film.
Adjective
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The world premiere on Sunday – in the presence of Illumination boss Chris Meledandri and director Pierre Coffin, who is also the origin of the minions’ unintelligible chatter – kicks off one of the biggest Annecy Film Festival’s yet.
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The adversaries made for a striking scene, exchanging insults in mutually unintelligible languages in the dead of night.
Adjective
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Engineers eventually replaced them with a version made up of 20 impermeable compartments of high-pressure hoses containing water.
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Dry waterproofing technology, which is basically like an invisible, impermeable sock liner.
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 4 Jul. 2026.
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