impenetrability

impenetrability is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Physics) That property in virtue of which two portions of matter can not at the same time occupy the same portion of space.
  2. 2.Insusceptibility of intellectual or emotional impression; obtuseness; stupidity; coldness.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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Reverse-dictionary questions

Definition-first questions whose answer is impenetrability.

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