General terms:
* ʻIole: This word generally refers to "rat", but can be used for a mouse in some contexts.
* Iole liʻiliʻi: This means "small rat", which could be used to describe a mouse.
More specific terms:
* ʻIole pākī: This means "house rat", which could be a good option for a mouse that lives indoors.
* ʻIole ʻōmaʻo: This literally translates to "green rat", but could be used to describe a field mouse, as "green" can sometimes refer to the countryside or rural areas.
Ultimately, the best way to communicate "mouse" in Hawaiian would be to use a descriptive phrase like "ʻIole liʻiliʻi" or "ʻIole i loko o ka hale" (mouse in the house).