🙇 Address & Relationships
오빠
The word a woman or girl uses for her older brother — and, by extension, for any older male she feels close to, including older male friends and boyfriends. Only female speakers use it; a man addressing an older man says "hyung" instead. Because it signals warmth and closeness, calling a non-relative "oppa" carries a flirtatious or affectionate undertone.
Literally: A native Korean kinship term literally meaning "a female's older brother."
오빠, 오늘 무대 진짜 멋있었어요!
Oppa, oneul mudae jinjja meosisseosseoyo!
→ Oppa, you were amazing on stage today!
K-pop fans famously call male idols "oppa" regardless of blood relation, and in K-dramas the moment a woman switches to calling a man "oppa" often marks growing romantic interest. Be careful in real life: it's only for female speakers addressing a somewhat older male they're genuinely close to — using it with strangers, much older men, or in professional settings comes off as overly familiar or flirty.
Unnie 언니
What a woman or girl calls her older sister, or an older female friend she's close to. It's strictly for female speakers; a man addressing an older woman says "noona" instead. It conveys affection and a sister-like bond rather than formality.
Hyung 형
What a man or boy calls his older brother, or an older male friend he's close to. It's for male speakers only; women use "oppa" for older males. Adding -nim ("hyungnim") makes it more deferential — or, in crime dramas, is how gang members address the boss.
Noona 누나
What a man or boy calls his older sister, or an older female friend he's close to. It's for male speakers only; women say "unnie" for older women. Like "oppa," it can carry romantic potential when used toward a non-relative.
Sunbae 선배
A senior at your school, workplace, or industry — someone who entered before you, regardless of their actual age. Both men and women use it, usually with the honorific suffix as "sunbaenim." The junior counterpart is "hoobae."
Hoobae 후배
A junior at your school, workplace, or industry — someone who entered after you, regardless of age. It's mostly used to describe the relationship rather than to address someone: you'd say "she's my hoobae," but call the person by their name. The senior counterpart is "sunbae."
Dongsaeng 동생
A younger sibling, or a younger close friend you treat like one — used by any gender about any gender. Like "hoobae," it's mainly referential: you describe someone as your dongsaeng but address them by name. Add yeo- (여동생) for a younger sister or nam- (남동생) for a younger brother.
Usage and nuance shift over time and between communities — treat this as a field guide, not a law book.