What is another word for unburnable?
Pronunciation: [ʌnbˈɜːnəbə͡l] (IPA) 
The term "unburnable" refers to materials that cannot be burned or consumed by fire. There are various synonyms for this term, including incombustible, non-flammable, fire-resistant, and fireproof. These terms are often used to describe materials that have been manufactured to withstand high temperatures, heat, and fire without burning or igniting. Examples of such materials include metal, ceramics, and certain types of concrete. In the context of environmental science, the term "unburnable" is often used to refer to fossil fuels that may have to be left in the ground to prevent catastrophic climate change. In this sense, it represents a shift away from our dependence on carbon-based fuels towards cleaner, renewable energy sources.
