Here are a few options, depending on the nuance you want to express:
Focusing on intelligence:
* ʻIke au: This literally means "I know," but can be used to imply understanding or intelligence.
* Akamai au: While "akamai" often translates to "clever," it can also be used to describe someone who is intelligent and resourceful.
Focusing on learning:
* Ke aʻo nei au: This means "I am learning," which suggests a willingness and ability to learn, implying intelligence.
Focusing on knowledge:
* Nui koʻu ʻike: This translates to "My knowledge is great," suggesting a wide base of knowledge and understanding.
Context is key:
The best way to express "I am smart" in Hawaiian depends on the context. Consider the situation and the specific type of intelligence you want to emphasize.