impenetrable
adjective
im·pen·e·tra·ble
(ˌ)im-ˈpe-nə-trə-bəl 
1
a
: incapable of being penetrated or pierced
b
: inaccessible to knowledge, reason, or sympathy : impervious
2
: incapable of being comprehended : inscrutable
Synonyms
Examples of impenetrable in a Sentence
The fort's defenses were thought to be impenetrable.
the ancient temple was surrounded by vast stretches of impenetrable jungle
Recent Examples on the Web
And while hyperbole made for eye-grabbing press reports, Silk Road was not a ‘vast global cartel’ but a sparsely populated platform on a small, impenetrable corner of the Internet.
—
Alex Winter, Rolling Stone, 2 May 2024
Its success may hold lessons in a market that has become increasingly impenetrable to content from outside the mainstream.
—Patrick Frater, Variety, 11 Apr. 2024
See all Example Sentences for impenetrable 
Alex Winter, Rolling Stone, 2 May 2024
Its success may hold lessons in a market that has become increasingly impenetrable to content from outside the mainstream.
—Patrick Frater, Variety, 11 Apr. 2024
See all Example Sentences for impenetrable
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'impenetrable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Impenetrable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impenetrable. Accessed 5 May. 2024.
Copy CitationKids Definition
impenetrable
adjective
im·pen·e·tra·ble
(ˈ)im-ˈpen-ə-trə-bəl
1
: impossible to get through or into
impenetrable walls
impenetrable jungle
2
: impossible to understand
an impenetrable mystery
impenetrability
noun
(ˌ)im-ˌpen-ə-trə-ˈbil-ət-ē
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