ultrahazardous

/ˌʌltrəˈhæzərdəs/
adjective
  1. Extremely dangerous; involving a very high level of risk, especially in legal or industrial contexts.
    • Blasting operations are ultrahazardous and require special permits.
    • Handling radioactive waste is considered an ultrahazardous activity.
    • The company was fined for storing chemicals in an ultrahazardous manner.
Antonyms