* "Wahi maloʻo" (pronounced "wah-hee mah-loh-oh") literally means "dry place". This could be used to describe a desert-like area, but it's not a specific term for desert.
* "Kona" can refer to a dry, leeward side of an island, similar to the leeward side of a mountain range. While not directly translating to "desert", it can be used to describe a dry and arid area.
Ultimately, the best way to describe a desert in Hawaiian would be to explain what you mean using descriptive words like "wahi maloʻo" or "kona" and adding additional details about the environment you are referring to.