uncontaminated

US /ˌʌn.kənˈtæm.ə.neɪ.t̬ɪd/
UK /ˌʌn.kənˈtæm.ə.neɪ.t̬ɪd/
1.

không bị ô nhiễm

not dirty or containing any harmful or unwanted substances:

:
•
The water is safe to drink, so long as it is drawn only from uncontaminated wells.