impenetrably
Americanadverb
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in a way that cannot be penetrated, seen through, or accessed.
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in a way that cannot be understood; unfathomably, incomprehensibly.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To the public, Greenspan was known for his impenetrably cryptic speaking style and for the relative tranquility in the American economy during his tenure, which has been termed “the great moderation” despite recurrent short-term crises.
From Los Angeles Times ● Jun. 25, 2026
In part that’s because of their concision — he typically writes short lines and never too many — and in part because they build an almost impenetrably tight argument through structure and sound.
From New York Times ● Jun. 23, 2023
It was, in the bluntest terms, a story about some attempts to help save the world … through initiatives with impenetrably bureaucratic names, like “the Western Resource Adequacy Program.”
From Seattle Times ● May 7, 2023
Its environments range from arid desertscapes with sand dunes hundreds of feet high to lush tropical rainforests blanketed by impenetrably dense foliage.
From Textbooks ● Apr. 19, 2023
To pretend there was an impenetrably thick glass wall between us in the one class where we were forced together.
From "Twilight" by Stephenie Meyer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
