unpolluted

/AH0 N P AH0 L UW1 T AH0 D/
verb
  1. 1

    To remove pollutants from; to purify.

adjective
  1. 1

    Not polluted; uncontaminated

Source: https://en.wiktionary.org/wiki/unpollute, https://en.wiktionary.org/wiki/unpolluted