What is the Hawaiian word for grandson?

There isn't a single, direct equivalent to "grandson" in Hawaiian. The way family relationships are described in Hawaiian often depend on the specific context and the speaker's relationship to the individual.

Here are some possibilities depending on the context:

* Moopuna: This is the most common and general term for grandchild, encompassing both grandsons and granddaughters.

* Keiki: This simply means "child" and can be used to refer to a grandson.

* Keiki Kane: This literally means "male child" and could be used to specifically refer to a grandson.

* Kumu: This can be used for a grandson, but it's more specific to a grandson who is seen as a mentor or teacher figure.

The best way to understand the nuances of Hawaiian family terms is to consider the specific relationship and the speaker's perspective.