What is the opposite of unhazardous?

Need antonyms for unhazardous? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Causing, or capable of causing, harm
Adjective
Capable of causing harm, injury or death due to the presence of poison
“Made from non-renewable oil resources, they are toxic, do not biodegrade, and are harmful to animals.”
Adjective
Dangerous or involving risks
“After breaking bad, Walter White would find himself in an awkward situation because his brother-in-law was the district attorney.”
Adjective
Requiring or involving physical effort
“My personal trainer has come up with an energetic exercise routine.”
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