Korean Titles: Oppa, Unnie, -ssi, -nim
How Koreans address friends, coworkers, and strangers — kinship titles, name suffixes, and how to say 'you'.
In Korean you can only call someone by their bare given name if they are a close friend of the same age or younger. For everyone else a title is required, and choosing the right one is the first social skill Korean speakers expect of you. This is why Koreans ask your age so early in a conversation — without it they genuinely cannot decide what to call you, and getting it wrong is more conspicuous than a grammar mistake.
Titles also do the work that the word 'you' does in English. Korean has 당신, but in practice it appears mainly between spouses or during arguments, so using it as a neutral 'you' will sound wrong. Instead Korean repeats the title where English would use a pronoun: 선생님은 커피 좋아하세요? literally reads 'does teacher like coffee?' and means 'do you like coffee?'. This lesson covers the core kinship titles, the three suffixes 씨, 님, and 아/야, and the safe fallbacks for when you are unsure.
Name + 씨 (Polite Address)
Attach 씨 to the given name or full name of an adult you are not close to. Never attach it to the surname alone — 김 씨 sounds rude, not polite.
Titles Instead of 'You'
Korean avoids the pronoun 당신 in everyday speech. To say 'you', repeat the person's title or name as the subject of the sentence.
-아/야 (Calling Close Friends)
To call a close same-age or younger friend, add 아 after a name ending in a consonant and 야 after a name ending in a vowel. This pairs with intimate speech (반말) only.
How It Works
Korean address terms form a layered system, and it helps to see the layers separately. The first layer is name suffixes. 씨 attaches to a given name or a full name and marks polite distance between adults of roughly equal standing. 님 is higher and attaches to roles rather than names — 선생님, 사장님, 고객님 — which is why it appears in customer service and online usernames.
The second layer is kinship titles used outside the family: 오빠, 형, 언니, 누나. What makes these unusual is that the correct choice depends on the speaker's gender as well as the listener's. A woman addresses an older man as 오빠; a man addresses the same person as 형. So the title tells you about both people in the relationship, not just one.
The third layer is role titles from school and work: 선배 for someone senior to you, 선생님 which extends well beyond actual teachers to become a general respectful address for any adult.
The structural consequence is that Korean largely does without a second-person pronoun. Where English repeats 'you', Korean repeats the title as the sentence subject: 선생님은 커피 좋아하세요? literally asks 'does teacher like coffee?' while meaning 'do you like coffee?'. 아/야 sits at the opposite end — attached to a name for close friends, and only with 반말.
Where You'll Hear It
At work, 씨 and role titles do most of the work. A colleague you are not close to is 지훈 씨; a manager is 팀장님 or 부장님, using the job title plus 님 rather than a name. Calling a superior by name alone, even with 씨, reads as a breach of hierarchy rather than friendliness.
In shops and restaurants the system is looser and warmer. 이모 — literally 'maternal aunt' — is commonly used to address middle-aged female staff at casual restaurants, and 사장님 works for the owner of almost any small business regardless of actual ownership. Neither is literal; both are friendly.
Among friends, the kinship titles do heavy social work. Being invited to use 언니 or 오빠 marks a shift from acquaintance to something closer, and that invitation usually comes from the older person. Until it does, 씨 is the safe choice.
저기요 remains the escape hatch. When you genuinely cannot judge someone's age or role — a stranger on the street, a passer-by you need to ask something — it sidesteps the entire system without giving offence, which is why it is worth having ready at all times.
Cultural & Language Note
Korean kinship titles are used far beyond actual family. A woman calls an older male friend 오빠 and a man calls him 형; the word depends on the speaker's gender, not just the listener's. This is why the same person can be 오빠 to one friend and 형 to another. Koreans ask your age early precisely because they cannot pick a title without it, and using no title at all reads as cold rather than neutral.
Common Mistakes to Avoid
씨 attaches to a given name or full name, never to a surname alone. 김 씨 is not polite — it lands somewhere between dismissive and rude, the opposite of what learners intend. Use 민수 씨 or 김민수 씨. The other frequent error is reaching for 당신 as 'you'; despite what dictionaries suggest, it appears mainly between spouses or in arguments, and Koreans repeat a title instead.
How to Practice This Lesson
Do not try to internalise the whole system at once. Learn three things first and you will handle almost every situation: 저기요 for strangers, [given name] 씨 for adults you are not close to, and [role]님 for anyone senior. That covers the overwhelming majority of real encounters.
For the kinship titles, write out only the ones you personally need. If you are a woman, you will use 오빠 and 언니 far more than 형 and 누나, so drill your own two rather than memorising all four symmetrically. The gender-of-speaker rule becomes much easier when you start from your own position.
Then practise the no-pronoun structure explicitly, because it feels unnatural at first. Take three questions you would ask with 'you' in English and rewrite each with a title as the subject: 수아 씨는 어디에 살아요?, 선생님은 언제 오세요? Doing this consciously a few times is what stops you reaching for 당신 under pressure.