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impenetrable
[ im-pen-i-truh-buhl ]
/ ɪmˈpɛn ɪ trə bəl /
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adjective
not penetrable; that cannot be penetrated, pierced, entered, etc.
inaccessible to ideas, influences, etc.
incapable of being understood; inscrutable; unfathomable: an impenetrable mystery.
Physics. possessing impenetrability.
OTHER WORDS FOR impenetrable
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
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In the UK, COTTON CANDY is more commonly known as…
Origin of impenetrable
OTHER WORDS FROM impenetrable
im·pen·e·tra·ble·ness, nounim·pen·e·tra·bly, adverbWords nearby impenetrable
impeller, impend, impendent, impending, impenetrability, impenetrable, impenitent, impennate, imper., imperatival, imperative
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use impenetrable in a sentence
British Dictionary definitions for impenetrable
impenetrable
/ (ɪmˈpɛnɪtrəbəl) /
adjective
incapable of being pierced through or penetratedan impenetrable forest
incapable of being understood; incomprehensibleimpenetrable jargon
incapable of being seen throughimpenetrable gloom
not susceptible to ideas, influence, etcimpenetrable ignorance
physics (of a body) incapable of occupying the same space as another body
Derived forms of impenetrable
impenetrability, nounimpenetrableness, nounimpenetrably, adverbCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
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