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[im-pen-i-truh-bil-i-tee, im-pen-] /ɪmˌpɛn ɪ trəˈbɪl ɪ ti, ˌɪm pɛn-/
the state or quality of being impenetrable.
Physics. that property of matter by virtue of which two bodies cannot occupy the same space simultaneously.
Origin of impenetrability
1655-65; impenetr(able) + -ability Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for impenetrability
Historical Examples
  • A great physicist tells us that, when dealing with sufficiently high speeds, matter has no such property as impenetrability.

    Carmen Ariza Charles Francis Stocking
  • This impenetrability and something mulish in her attitude annoyed him.

    Saint's Progress John Galsworthy
  • By long residence in Holland, he had adopted a good portion of Dutch impenetrability and slowness.

    Before and after Waterloo Edward Stanley
  • But, of course, with his English impenetrability, nobody can tell what he thinks.

  • The cotton-wool experiment is therefore no contradiction of impenetrability.

    The Boy's Playbook of Science John Henry Pepper
  • The impenetrability of the embodied Gould Concession had its surface shades.

  • The towering closeness of these on each hand, their impenetrability, and their ponderousness, are felt as a physical pressure.

  • Hence arises her impenetrability to whatever is true in Western thought.

  • Nothing was more remarkable than his impenetrability to ridicule and censure.

    Arthur Mervyn Charles Brockden Brown
  • Monroe, in his impenetrability, did not see anything unusual.

    Edith and John Franklin S. Farquhar

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