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Lesson 118: native Korean numbers, 비음화, and introducing yourself

The second number system, the sound rule that explains why 입니다 is heard as imnida, and a self-introduction that does not stop at your name — including how to ask someone's age without asking their age.

  • korean
  • numbers
  • pronunciation
  • work-culture
  • hmgics

The other set of numbers. Sino-Korean (117) counts money and dates; these count age, hours, and things.

12345678910
하나다섯여섯일곱여덟 [여덜]아홉

The teens are built the same way as Sino-Korean, 열 plus the ones word:

111213141516171819
열하나열둘열셋열넷열다섯열여섯열일곱열여덟열아홉

The tens, however, are nine separate words with nothing in common — this is the part that has to be memorised rather than derived:

2030405060708090
스물서른마흔예순일흔여든아흔

Native Korean stops at 99. From 100 onwards you switch to Sino-Korean 백, even for things the native set would otherwise count. There is no native word for a hundred in current use.

여덟 is written with a double 받침 ㄼ but said [여덜] — only the ㄹ survives, which is the 겹받침 rule from 105.

Pronunciation: 비음화, nasalisation

The rule behind a sound you have been making since your first week without knowing why.

When ㄱ, ㄷ or ㅂ is followed by ㄴ or ㅁ, it becomes a nasal — ㅇ, ㄴ and ㅁ respectively. The stop can’t survive next to a nasal, so it turns into the nasal made in the same place in the mouth.

StopBecomesMade at
the soft palate (velar)
the ridge behind the teeth (alveolar)
the lips (bilabial)

Notice that each stop turns into the nasal from its own row — the tongue does not move, it just lets air through the nose instead. That is why the pairs are what they are.

written
국물
sound
[궁물]
[gung-mul]soup — ㄱ before ㅁ becomes ㅇ
written
백만
sound
[뱅만]
[baeng-man]a million — the same ㄱ → ㅇ

And the one that matters most, because it is in every formal sentence you will ever say:

written
입니다
sound
[임니다]
[im-ni-da]am / is / are — ㅂ before ㄴ becomes ㅁ

This is why 입니다 is always heard as imnida, never ipnida. It is not sloppiness and it is not an exception; it is the rule applying to the single most common ending in formal Korean. Same for 먹습니다 [먹씀니다] and 감사합니다.

The consonants by place of articulation

GroupLetters
Velarㄱ · ㅋ · ㄲ
Alveolarㄷ · ㅌ · ㄸ · ㅅ · ㅆ · ㄴ · ㄹ
Palatalㅈ · ㅊ · ㅉ
Bilabialㅂ · ㅍ · ㅃ · ㅁ
Guttural
Silent

Grammar recap: the two politeness levels

Both endings from 1A, side by side, because 1B uses them interchangeably in dialogues from here on.

Casual polite — -아요/어요/해요

-아요-어요-해요
Stem vowel is ㅏ or ㅗAny other stem vowelN하다
살다 → 살아요먹다 → 먹어요 [머거요]일하다 → 일해요
가다 → 가아요 → 가요마시다 → 마시어요 → 마셔요공부하다 → 공부해요

Formal polite — -ㅂ니다/습니다

Statement in -ㅂ니다/습니다, question in -ㅂ니까/습니까.

-ㅂ니다-습니다
Stem ends in a vowelStem ends in a consonant
가다 → 갑니다 / 갑니까?먹다 → 먹습니다 / 먹습니까?
보다 → 봅니다 / 봅니까?읽다 → 읽습니다 / 읽습니까?

Every one of those is nasalised on the way out: 갑니다 [감니다], 먹습니다 [먹씀니다].

Work culture: 자기소개, self-introduction

A Korean self-introduction has more required parts than an English one. Doing only the name reads as unfinished.

1. Greeting

MeaningFormalCasual polite
Hello안녕하십니까?안녕하세요?
Pleased to meet you for the first time처음 뵙겠습니다.
Nice to meet you만나서 반갑습니다.만나서 반가워요.
I look forward to working with you잘 부탁드립니다.잘 부탁드려요.

2. Name

The plain question is 이름이 뭐예요?. The one you use with anyone senior is 성함이 어떻게 되세요? — literally “how does your name come to be”, which avoids pointing at the person at all.

MeaningFormalCasual polite
I am ___저는 ___입니다.저는 ___이에요/예요.
My name is ___제 이름은 ___입니다.제 이름은 ___이에요/예요.
I’m called ___저는 ___(이)라고 합니다.저는 ___(이)라고 해요.

(이)라고 하다 is the useful one for a non-Korean name, because it frames it as what you are called rather than asserting a Korean-shaped noun: 저는 페이라고 합니다.

3. Age

Plain: 몇 살이에요?. Polite: 나이가 어떻게 되세요?, or 연세 for someone much older.

SuffixMeaningExample
years of age34살
born in1989년생
zodiac animal of your birth year뱀띠

살 takes native numbers — 서른네 살, not 삼십사 살.

Asking age without asking age

Age decides the whole register of a Korean conversation, so it gets asked early — but asking directly can be blunt. The zodiac is the standard way round it: the animals cycle every twelve years, so the answer narrows someone to a handful of possible years without a number ever being said.

A: 무슨 띠예요? — What’s your zodiac sign? B: 돼지띠예요. — I’m a pig.

AnimalKoreanYears
Rat쥐띠1972, 1984, 1996, 2008
Ox소띠1973, 1985, 1997, 2009
Tiger호랑이띠1974, 1986, 1998, 2010
Rabbit토끼띠1975, 1987, 1999, 2011
Dragon용띠1976, 1988, 2000, 2012
Snake뱀띠1977, 1989, 2001, 2013
Horse말띠1978, 1990, 2002, 2014
Sheep양띠1979, 1991, 2003, 2015
Monkey원숭이띠1980, 1992, 2004, 2016
Rooster닭띠1981, 1993, 2005, 2017
Dog개띠1982, 1994, 2006, 2018
Pig돼지띠1983, 1995, 2007, 2019

In practice both people can usually place each other within a year from the animal plus a glance, which is the entire point.