However, it's important to note that 'ā'ā refers specifically to a type of lava flow that is characterized by its rough, jagged surface.
If you're looking for a more general term for "burnt," like what you would use to describe burnt toast or burnt food, you could use 'ā'ā but it's not as common.
Here are some other possible translations depending on the context:
* puhi - This word refers to something that has been smoked or charred.
* 'ō'ō - This word refers to something that has been singed or scorched.
* hāhā - This word refers to something that is withered or dried up, possibly due to being burnt.
The best word to use would depend on the specific context of your sentence.