Adjective uncontaminated has 2 senses
  1. uncontaminated - not corrupted by contact or association; "there is no culture uncontaminated by contact with the outside world"
    Antonym:
    contaminated
  2. uncontaminated, unpolluted - free from admixture with noxious elements; clean; "unpolluted streams"; "a contaminated lake"
    Antonym: impure (indirect, via pure)
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