Part of speech: adverb


Part of speech: noun

The quality of being impenetrable; that attribute of matter which prevents two bodies from occupying the same space at the same time.

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Usage examples "impenetrability":

  1. 3. The sense of touch gives rise to the idea of resistance, and thence to that of solidity, in the sense of impenetrability. - "Critiques and Addresses", Thomas Henry Huxley.