Hawaiian focuses on describing the specific characteristics of a place, so you'd need to use descriptive words to convey the concept of a savanna.
Here are some ways to describe a savanna in Hawaiian:
* "Waiʻanae ākea": This translates to "vast, open land with scattered trees" and could be used to describe the general appearance of a savanna.
* "Kūlanā nui me nā lāʻau liʻiliʻi": This translates to "large, open grasslands with small trees" and is more specific about the vegetation.
* "ʻĀina maloʻo me nā lāʻau": This translates to "dry land with trees" and emphasizes the dry climate typical of many savannas.
Ultimately, the best way to describe a savanna in Hawaiian would depend on the specific context and what aspects of the savanna you want to highlight.