IMPENETRABLE Synonyms: 141 Similar and Opposite Words

impenetrable

adjective

(ˌ)im-ˈpe-nə-trə-bəl

Definition of impenetrable next

as in dense

impossible to get through or into the ancient temple was surrounded by vast stretches of impenetrable jungle

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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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as in incomprehensible

impossible to understand the textbook's language is completely impenetrable, at least to me

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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

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 impenetrable Rake grounds into the upper soil layer to avoid creating an impenetrable mat on the soil surface. —

Kim Toscano, Southern Living, 17 May 2026 When faced with a unified, impenetrable front that raises the geopolitical costs of his disruption, Trump simply moves on. —

Jeffrey Sonnenfeld, Time, 11 May 2026 Elite defenses have increasingly tested and thwarted Denver’s once-impenetrable two-man game in the playoff moments that often steer front offices in their decision-making. —

Bennett Durando, Denver Post, 1 May 2026 Nate, on the other hand, just needed to show up in something simple but elevated (while honoring Jacob Elordi’s impenetrable Bottega Veneta contract), so he’s styled in a custom Bottega Veneta tuxedo. —

Zoe Papelis, Vulture, 27 Apr. 2026 See All Example Sentences for impenetrable

Recent Examples of Synonyms for impenetrable

Adjective

Set in a quiet residential neighborhood, this intimate beachfront property (whose name mixes the owners’ first initials with the Dutch word for oasis) uses dense, vibrant landscaping and shutters and stone walls between guest rooms to create a cocooning feeling of privacy.

— Condé Nast, Condé Nast Traveler, 2 June 2026
The installation, Unheimlich Manöver, 2007, consists of the entire contents of Liden’s former three-hundred-square-foot apartment in Stockholm, organized into a dense rectilinear mass as if placed in storage.

— Erika Landström, Artforum, 2 June 2026