decontamination
🇺🇸
/ˌdiːkənˌtæmɪˈneɪʃn/
🇬🇧
/ˌdiːkənˌtæmɪˈneɪʃn/
cleaning something to remove dangerous or unwanted substances
After the chemical spill, the area underwent thorough decontamination to ensure public safety.