I don’t have these committed to memory yet and I should. These words periodically appear in example sentences we get and it would be nice to have some of these memorized. Get ready, though, because there are a lot of words and they fork contingent on the relation of the family member to you.

Oh good God why

한글 Meaning
어머니 (엄마) Mother (Mom)
아버지 (아빠 ) Father (Dad)
부모님 Parents
Older brother (and you are a boy)
오빠 Older brother (and you are a girl)
누나 Older sister (and you are a boy)
언니 Older sister (and you are a girl)
동생 Younger sister
남동생 Younger brother
조부모님 Grandparents
(외/친)할아버지 (Mother’s side/Father’s side) grandfather
(외/친)할머니 (Mother’s side/Father’s side) grandmother
삼촌 (외삼촌) Father’s side uncle (Mother’s side uncle)
고모 (이모) Father’s side aunt (Mother’s side aunt)

Oh, it gets better if you want to talk about your spouse…

한글 Meaning
남편 Husband (most polite/neutral)
주인 Husband (as in “master” and head of the household; don’t use this)
바깥양반 Husband (quaint, also kind of problematic)
주인양반 Husband (basically same as 주인, problematic)
아비 Husband (if wife is talking to her elders)
애비 Husband (more “my child’s father”, old-fashioned)
아내 Wife (most polite/neutral)
부인 Wife (in practice: not yours)
안사람 Wife (literally: “inside person”, as in the house… yeah…)
에미 Wife (more “my child’s mother”, like 애비)