Dictionary

impenetrability

noun im·pen·e·tra·bil·i·ty \(ˌ)im-ˌpe-nə-trə-ˈbi-lə-tē\

Definition of IMPENETRABILITY

1
:  the inability of two portions of matter to occupy the same space at the same time
2
:  the quality or state of being impenetrable
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First Known Use of IMPENETRABILITY

1653

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