1. 막내 (maknae): This is the most common way to say "bunso" and refers to the youngest sibling.
2. 막내딸 (maknaettal): This specifically refers to the youngest daughter.
The word "bunso" itself isn't a common term in Korean.
Here are some example sentences:
* 나는 막내야. (naneun maknaeya.) - I am the youngest.
* 그녀는 막내딸이야. (geoneun maknaettalia.) - She is the youngest daughter.