Uncontaminated
[,ʌnkən'tæmɪnetɪd]
Definition
(adj.) free from admixture with noxious elements; clean; 'unpolluted streams'; 'a contaminated lake' .
(adj.) not corrupted by contact or association; 'there is no culture uncontaminated by contact with the outside world' .
Checker: Zelig--From WordNet