For a general grove of trees:
* Lāʻau ulu: This literally means "growing trees", and could be used to describe a general grove.
* Wao: This means "forest", and could be used if the grove is dense and large enough to be considered a small forest.
For a specific type of grove:
* Kōkua ulu: This refers to a grove of coconut trees.
* Kūpaʻa ulu: This refers to a grove of hala trees.
* ʻŌhiʻa ulu: This refers to a grove of ʻōhiʻa lehua trees.
You could also use a more descriptive phrase, like:
* Kahi o nā lāʻau: This means "place of the trees".
* Nā lāʻau i ulu pū: This means "the trees that grew together".
Ultimately, the best way to translate "grove" in Hawaiian depends on the context and the specific type of trees in the grove.