Mandarin:
* 哥哥 (gēge): Older brother
* 弟弟 (dìdi): Younger brother
* 兄弟 (xiōngdì): Brother (general term, can refer to older or younger brother)
Cantonese:
* 哥哥 (gā gā): Older brother
* 弟弟 (dai dai): Younger brother
* 兄弟 (hing dai): Brother (general term, can refer to older or younger brother)
Important Note: When talking about a brother, it's important to use the correct term based on their age relative to you.