A2 conjunction 2 min read

~으니까/니까

A word used to explain the reason or cause for an action.

~eu-nikka/nikka
Practice it

Explanation at your level:

You use this to say 'because'. If you are hungry, you say 'I am hungry, so I will eat.' In Korean, you put the reason first. It is very easy to use once you practice!

At this level, you start using it with suggestions. 'It is raining, so let's take an umbrella.' It helps you connect two simple sentences into one longer, better sentence.

You will notice that native speakers use this to explain their own thoughts. It is different from 'because' in English because it often implies a personal realization or a specific request.

You can now use it to justify decisions in professional or social settings. It shows you have a clear grasp of cause-and-effect relationships in Korean dialogue.

At this level, you understand the nuance of subjective reasoning. You can use it to frame arguments where the cause is a personal observation rather than an objective fact.

You master the subtle difference between this and other causal markers like '어서/아서'. You know exactly when the reason is a personal 'discovery' versus a general 'fact'.

Word in 30 Seconds

  • Used for reasons.
  • Connects two clauses.
  • Works with commands.
  • Very common in speech.

Think of ~으니까/니까 as your go-to tool for explaining the 'why' behind your actions. It is a super common way to link two ideas together in Korean.

When you use this, you are telling the listener: 'Because of this first thing, I am doing this second thing.' It is very natural and sounds slightly more active than other causal markers.

You will use ~으니까 if the verb stem ends in a consonant, and ~니까 if it ends in a vowel. It is perfect for when you want to give a reason for a request or a suggestion!

The structure evolved from older Korean grammar forms that emphasized the logical sequence of events. Historically, it was used to separate a premise from a conclusion.

Over centuries, the language streamlined these forms to make speech faster and more fluid. The shift from older, more complex endings to the modern ~으니까/니까 reflects the Korean language's move toward efficiency in daily communication.

It shares roots with other archaic causal markers, but it has solidified its place as the standard for personal reasoning and conversational flow in modern Korean.

You use this in daily conversation constantly. It is the bridge between your feelings and your actions.

It is very common to pair this with suggestions (let's do...) or commands (please do...). For example, 'It is cold, so please close the window.'

While it is used in both formal and informal settings, it is slightly more subjective than the more formal '때문에' (because of). It sounds more like you are sharing your personal logic with the listener.

While not an idiom itself, it is part of common set phrases.

  • ~으니까요: Adding 'yo' makes it a complete sentence ending.
  • ~으니까 말이야: Used to emphasize the reason in a conversational way.
  • ~으니까 됐다: 'Since it's done, that's enough.'
  • ~으니까 그만해: 'Because I said so, stop it.'
  • ~으니까 가자: 'Since we are ready, let's go!'

The grammar is straightforward: Verb/Adjective Stem + Ending. No space is needed between the stem and the ending.

Pronunciation is smooth. The 'k' sound is aspirated, meaning you should let a little puff of air out when you say 'kka'.

It doesn't have plural forms because it is a particle. It is essentially a functional connector that makes your sentences sound like a native speaker's.

Fun Fact

It evolved from a contraction of older particles that linked premises.

Pronunciation Guide

UK /eu-ni-kka/

Crisp 'eu' sound, strong 'kka' aspiration.

US /eu-ni-kka/

Similar to UK, focus on the glottal stop in 'kka'.

Common Errors

  • Softening the 'kka' sound
  • Adding a space
  • Wrong vowel length

Rhymes With

니까 있으니까 없으니까 가니까 보니까

Difficulty Rating

Reading 2/5

Easy to recognize

Writing 2/5

Easy to apply

Speaking 2/5

Natural in conversation

Listening 2/5

Commonly heard

What to Learn Next

Prerequisites

~다 먹다 가다

Learn Next

~어서/아서 때문에

Advanced

~길래 ~는 바람에

Grammar to Know

Causal conjunctions

비가 와서/비가 오니까

Imperative form

하세요

Hortative form

합시다

Examples by Level

1

배가 고프니까 밥을 먹어요.

Hungry + because + meal + eat.

Consonant stem usage.

2

비가 오니까 우산을 써요.

Rain + because + umbrella + use.

Vowel stem usage.

3

피곤하니까 잘게요.

Tired + because + will sleep.

Adjective usage.

4

추우니까 문을 닫아요.

Cold + because + door + close.

Request pattern.

5

바쁘니까 나중에 봐요.

Busy + because + later + see.

Polite refusal.

6

좋으니까 샀어요.

Good + because + bought.

Past tense.

7

재미있으니까 보세요.

Fun + because + watch.

Imperative.

8

가까우니까 걸어가요.

Close + because + walk.

Reason for action.

1

덥으니까 에어컨을 켜요.

2

시간이 없으니까 빨리 가요.

3

맛있으니까 더 먹어요.

4

비싸니까 안 살게요.

5

쉬우니까 해보세요.

6

집이니까 편해요.

7

오늘이니까 특별해요.

8

아프니까 쉬어야 해요.

1

약속이 있으니까 먼저 갈게요.

2

준비가 다 됐으니까 출발해요.

3

말씀을 들으니까 이해가 돼요.

4

오늘 날씨가 좋으니까 산책해요.

5

공부를 많이 했으니까 합격할 거예요.

6

길이 막히니까 지하철을 타요.

7

친절하니까 인기가 많아요.

8

중요한 날이니까 일찍 일어나요.

1

어제 과음을 했으니까 오늘은 쉬어야겠어요.

2

상황이 변했으니까 계획을 수정합시다.

3

직접 겪어봤으니까 잘 알 거예요.

4

도움이 필요하니까 언제든 연락해요.

5

이미 결정했으니까 후회하지 마요.

6

열심히 노력했으니까 좋은 결과가 있을 거예요.

7

다들 기다리고 있으니까 빨리 오세요.

8

이게 마지막 기회니까 최선을 다하세요.

1

그렇게 말씀하시니까 저도 생각이 바뀌네요.

2

상대방의 입장을 고려하니까 이해가 가요.

3

데이터가 부족하니까 결론을 내리기 어려워요.

4

모두가 동의하니까 진행하도록 하죠.

5

경험이 많으니까 그 사람 의견을 들어봅시다.

6

시간이 촉박하니까 핵심만 이야기해요.

7

원인이 분명하니까 해결책도 찾을 수 있어요.

8

오랜만에 만났으니까 회포를 풀어야죠.

1

본질적인 문제를 파악했으니까 이제 해결책을 모색해야 합니다.

2

그간의 노고를 알고 있으니까 충분히 이해합니다.

3

사태가 심각하니까 즉각적인 대응이 필요합니다.

4

역사적 맥락을 고려하니까 그 사건이 다르게 보입니다.

5

본인의 의사가 중요하니까 직접 결정하게 하세요.

6

논리적으로 완벽하니까 반박할 여지가 없군요.

7

기반이 탄탄하니까 무너지지 않을 것입니다.

8

상호 존중이 바탕이 되니까 관계가 지속됩니다.

Common Collocations

바쁘니까
좋으니까
알고 있으니까
중요하니까
가까우니까
맛있으니까
시간이 없으니까
비가 오니까
어려우니까
필요하니까

Idioms & Expressions

"아프니까 청춘이다"

It's youth because it hurts (struggle is part of growing up).

힘들어도 아프니까 청춘이다.

literary

"좋으니까 좋다"

I like it because I like it (no other reason).

그냥 좋으니까 좋아.

casual

"바쁘니까 사람이다"

Being busy is part of being human.

바쁘니까 사람이지, 안 그래?

casual

"말하니까 말이다"

Speaking of which...

말하니까 말인데, 그 사람 어때?

neutral

"가니까 가다"

I go because I go (just doing it).

가니까 가는 거지.

casual

"되니까 된다"

It works because it works.

되니까 되는 거야.

casual

Easily Confused

~으니까/니까 vs ~어서

Both mean 'because'.

~어서 is for general cause; ~으니까 is for commands.

비가 와서 못 갔다 vs 비가 오니까 집에 있자.

~으니까/니까 vs 때문에

Both mean 'because'.

때문에 follows a noun.

비 때문에 vs 비가 오니까.

~으니까/니까 vs ~기 때문에

Both mean 'because'.

~기 때문에 is more formal/objective.

춥기 때문에 vs 추우니까.

~으니까/니까 vs 그래서

Both show cause/effect.

그래서 starts a new sentence.

비가 온다. 그래서 집에 간다.

Sentence Patterns

A1

[Reason] + 으니까 + [Action]

배가 고프니까 먹자.

A2

[Reason] + 으니까 + [Result]

비가 오니까 길이 막혀요.

B1

[Past Reason] + 었으니까 + [Result]

공부했으니까 합격했어요.

B1

[Adjective] + 으니까 + [Suggestion]

재미있으니까 같이 봐요.

B2

[Noun] + 이니까 + [Conclusion]

오늘이니까 즐기자.

Word Family

Related

그러니까 Therefore/I mean
왜냐하면 Because (start of sentence)

How to Use It

frequency

10

Formality Scale

Formal Neutral Casual Slang

Common Mistakes

Using with past tense ~았/었 → ~었으니까
You must attach it to the past tense stem.
Adding space → 붙으니까
It is a suffix, not a separate word.
Confusing with ~어서 → Imperative/Hortative
Use ~으니까 for commands/suggestions.
Overusing in formal writing → ~기 때문에
For high-level essays, use more formal markers.
Misspelling as ~으니가 → ~으니까
Correct spelling is critical for clarity.

Tips

💡

Memory Palace

Visualize a bridge between two rooms.

💡

Native Speakers

Use it when you want someone to do something.

🌍

Cultural Insight

It reflects the Korean focus on relationships.

💡

Grammar Shortcut

Always check the last letter of the stem.

💡

Say It Right

Exaggerate the 'kka' sound.

💡

Don't Make This Mistake

Do not put a space.

💡

Did You Know?

It is one of the first grammar points learned.

💡

Study Smart

Write 5 sentences about your morning.

Memorize It

Mnemonic

Think of 'KKA' as 'K-K-A' (Keep Kicking Action) - because you are doing an action!

Visual Association

A chain link connecting two blocks.

Word Web

Reason Action Result Logic

Challenge

Try to explain 5 things you did today using this word.

Word Origin

Korean

Original meaning: Logical connection of events

Cultural Context

None, universally used.

Directly maps to 'because' or 'since' in English.

Many K-drama titles use this structure for emotional impact.

Practice in Real Life

Real-World Contexts

At work

  • 바쁘니까 나중에 할게요.
  • 중요하니까 확인하세요.
  • 회의가 있으니까 이따 봐요.

At school

  • 어려우니까 도와주세요.
  • 시험이니까 공부해요.
  • 수업이니까 조용히 하세요.

At home

  • 피곤하니까 잘게요.
  • 배고프니까 밥 먹자.
  • 추우니까 문 닫아.

Traveling

  • 가까우니까 걸어가요.
  • 유명하니까 가봅시다.
  • 맛있으니까 드셔보세요.

Conversation Starters

"왜 한국어를 공부해요?"

"오늘 날씨가 어때요?"

"왜 그 영화를 좋아해요?"

"왜 지금 가야 해요?"

"왜 웃고 있어요?"

Journal Prompts

내가 오늘 한 일과 이유를 쓰세요.

내가 좋아하는 음식과 그 이유.

내가 한국어를 공부하는 이유.

내가 오늘 기분이 좋은 이유.

Frequently Asked Questions

8 questions

Yes, attach to the past stem: ~었으니까.

No, ~으니까 can be used with commands, ~어서 cannot.

Vowel stem = 니까, Consonant stem = 으니까.

No, it must connect two clauses.

It is neutral and used in all levels of speech.

No, it is a conjunction.

Yes, it is the best choice for suggestions.

Because it is the most natural way to explain reasons.

Test Yourself

fill blank A1

배가 ___ 밥을 먹어요.

Correct! Not quite. Correct answer: 고프니까

Correct causal marker.

multiple choice A2

Which sentence is correct?

Correct! Not quite. Correct answer: 비가 오니까 우산 써요.

Logical completion.

true false B1

Can you use ~으니까 for a command?

Correct! Not quite. Correct answer: True

Yes, it is perfect for suggestions.

match pairs B1

Word

Meaning

All matched!

Matching stems.

sentence order B2

Tap words below to build the sentence
Correct! Not quite. Correct answer:

Correct word order.

Score: /5

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