General unification:
* Hui pū ʻia: This literally translates to "come together," implying a gathering or merging of separate entities.
* Hoʻohuihui: This emphasizes the act of bringing together multiple things or people.
Unification with a specific purpose:
* Hoʻokahi ʻia: This implies unifying towards a single goal or purpose.
* Hoʻopili ʻia: This means "to join together," suggesting a strong bond or connection.
Unification through shared identity:
* Hoʻokuʻikahi ʻia: This emphasizes unifying based on shared values or beliefs.
* Hoʻokaʻawale ʻole: This means "not divided," suggesting unity and solidarity.
The best translation will depend on the specific situation you are referring to. You might also use a phrase like "e hoʻohuihui iā kākou" which means "let us unite."
Ultimately, the best way to say "unite" in Hawaiian is to choose the phrase that best conveys the meaning you want to express.