English

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Etymology

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From unpure +‎ -ness or un- +‎ pureness.

Noun

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unpureness (usually uncountable, plural unpurenesses)

  1. (uncountable) The state or quality of being unpure; impurity.
  2. (countable) That which is unpure; an impurity.
    • 1994, Lütfi Öveçoğlu, Harun Yaparlar, Türk Seramik Derneǧi, II International Ceramics Congress:
      The unpurenesses caused by oxides such as Ti02, CaO, MgO, Na20 and S02 are not out of limit needed to be obeyed in the ceramic industry.