unpermeable

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English

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Etymology

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From un- +‎ permeable.

Adjective

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unpermeable (comparative more unpermeable, superlative most unpermeable)

  1. impermeable
    • 1931, West Virginia Academy of Science, Proceedings, volumes 5-8, page 90:
      The Vorce cell is of the permeable class and the Hargreaves-Bird of the unpermeable.