For a male speaker:
* ʻŌpiopio: This is the most common and general term for a younger brother. It literally means "younger one."
* Keiki: This term means "child" and can also be used to refer to a younger sibling, regardless of gender.
* Kaikuahine: This word literally means "brother" and is more specific to a male sibling. However, it can be used for younger brothers as well, depending on the context.
For a female speaker:
* ʻŌpiopio: This term is also used by female speakers to refer to a younger brother.
* Kaikuahine: This word is more formal and is often used when addressing a younger brother directly.
* Keiki: This is a gender-neutral term and can be used by female speakers to refer to a younger brother.
It's important to note that the best translation will depend on the specific situation and the relationship between the speaker and the younger brother.