막내
sʌbseː cʰoːʈaː bʌcːaː sabs tʃəʊtə bɑːktʃə jʌŋɡɪst tʃaɪld bʌt ɪts spəsɪfɪkli ɐbaʊt ðə lastbɔːn ɪn ɐ famɪli
In Hindi सबसे छोटा बच्चा (sabse chota bachcha - youngest child), but it's specifically about the last-born in a family.
The youngest child in a family.
Example
"저는 우리 가족의 막내입니다."