unpolluted
adjective
un·pol·lut·ed
| \ ˌən-pə-ˈlü-təd
\
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Definition of unpolluted
: not contaminated or made unclean or impure : not polluted
a mind unpolluted by hatred
especially
: not contaminated with man-made waste
unpolluted water … an unpolluted wilderness of startling size in this heavily populated state. — Nancy Piccin