de·con·tam·i·nate 
/ˌdi:kənˈtæməˌneɪt/ verb
de·con·tam·i·nates; de·con·tam·i·nat·ed; de·con·tam·i·nat·ing /ˌdi:kənˈtæməˌneɪt/ verb [+ obj] : to remove dirty or dangerous substances (such as radioactive material) from (a person, thing, place, etc.)
▪ Special workers were called in to decontaminate the area after the oil spill.
▪ Special workers were called in to decontaminate the area after the oil spill.
— de·con·tam·i·na·tion /ˌdi:kənˌtæməˈneɪʃən/ noun [noncount]
▪ the decontamination of drinking water
/ˌdi:kənˌtæməˈneɪʃən/ noun [noncount] ▪ the decontamination of drinking water
