uncontaminated

Adjective uncontaminated has 2 senses

• uncontaminated(a = adj.all) - not corrupted by contact or association; "there is no culture uncontaminated by contact with the outside world"
Antonym: contaminated

• uncontaminated(s = adj.all) unpolluted - free from admixture with noxious elements; clean; "unpolluted streams"; "a contaminated lake"

uncontaminated