Thesaurus

impenetrable

adjective

Synonyms & Antonyms of impenetrable

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

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Antonyms for impenetrable

4 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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Antonyms for impenetrable

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The first known use of impenetrable was in the 15th century

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Cite this Entry

“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 26 Sep. 2020.

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More from Merriam-Webster on impenetrable

Dictionary: Definition of impenetrable

Nglish: Translation of impenetrable for Spanish Speakers

Britannica English: Translation of impenetrable for Arabic Speakers

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