여동생
yeodongsaeng · TOPIK 1
younger sister
👧 여동생 = 여 (女 female) + 동생 (同生 younger sibling)
동생 means younger sibling, from hanja 同生, literally same-born. Prefix 여 (女, female) makes it younger sister; swap in 남 (男, male) and 남동생 is younger brother. Learn 동생 once and both words come for free.