삼십 (samsip) means “thirty” | MotiTan Korean Dictionary

More examples

줄에 삼십 명이 서 있어요.chu re sam sip myeong i seo i sseo yo

There are thirty people standing in line.

Three groups of ten gathered into one number.

서른seoreun: A Korean native number used to describe a person's age as thirty.

삼십은 열이 세 번 모인 수로, 스물아홉 다음인 수.sam si beun yeo ri se peon mo in su ro seu mu ra hop ta eu min su

This Sino-Korean numeral combines 삼 (sam, "three") and 십 (sip, "ten") to form thirty.

When talking about age, Korean often chooses a native number word, while this form appears in other number-based settings.