* ʻAkaʻaka (pronounced ah-kah-ah-kah): This means "smiling" or "laughing" and is a good general term for a happy expression.
* ʻOluʻolu (pronounced oh-loo-oh-loo): This means "pleasant" or "kind," which can also imply a cheerful demeanor.
* Hauʻoli (pronounced hah-oo-oh-lee): This means "happy," and you could use this phrase to describe someone who is generally joyful or has a happy expression.
It's important to consider the context when choosing the right phrase. For example, if you want to describe someone's facial expression, "ʻAkaʻaka" might be a good choice. If you want to describe someone's overall personality, "ʻOluʻolu" might be more appropriate.