자다 vs 깨다: Sleep vs Wake Up Difference

자다 (ja-da, jada) · 깨다 (kkae-da, kkaeda)

'자다' means to be sleeping, while '깨다' means to wake up from sleep.

Comparison of Korean verbs 자다 (to sleep) and 깨다 (to wake up)

Word-by-word breakdown

One lane per word — no nested boxes, just the gist.

자다(ja-da, jada)

Indicates the act or state of sleeping.

When to use

Sleeping state, Napping, Sleeping at night

The nuance

'자다' is used only when someone is sleeping; it cannot be used to describe waking up.

깨다(kkae-da, kkaeda)

Indicates the act or state of waking up from sleep.

When to use

Waking up from sleep, Getting up in the morning, Brief awakening

The nuance

'깨다' is used to express the moment of waking up or being awake after sleep.

Real-world examples

  • 나는 밤새 잘 잤다.

    na-neun bam-sae jal jass-da., na neun bam sae jal jass da.

    Appropriate sentence expressing the state of sleeping.

  • 나는 밤새 깨었다.

    na-neun bam-sae kkae-eoss-da., na neun bam sae kkae eoss da.

    '깨다' means the moment of waking up, so it is incorrect to say '깨었다' to mean being awake all night; use '깨어 있었다' instead.

  • 아침에 일찍 깨서 운동했다.

    a-chim-e il-jjik kkae-seo un-dong-haess-da., a chim e il jjik kkae seo un dong haess da.

    Correct usage to express waking up and then doing something.

  • 그는 지금 자고 있다.

    geu-neun ji-geum ja-go iss-da., geu neun ji geum ja go iss da.

    Correct expression for currently sleeping.

  • 나는 낮잠을 깨고 싶다.

    na-neun naj-jam-eul kkae-go sip-da., na neun naj jam eul kkae go sip da.

    '깨다' means to wake up, so '낮잠을 깨고 싶다' is unnatural; correct forms are '낮잠에서 깨고 싶다' or '일어나고 싶다'.

  • 잠이 들기 전에 깨 있었다.

    jam-i deul-gi jeon-e kkae iss-eoss-da., jam i deul gi jeon e kkae iss eoss da.

    Properly expresses being awake before falling asleep.

  • 나는 자고 나서 기분이 좋아졌다.

    na-neun ja-go na-seo gi-bun-i joh-a-jyeoss-da., na neun ja go na seo gi bun i joh a jyeoss da.

    Sentence correctly shows change after sleeping.

  • 그는 갑자기 깨서 소리를 질렀다.

    geu-neun gap-ja-gi kkae-seo so-ri-reul jil-reoss-da., geu neun gap ja gi kkae seo so ri reul jil reoss da.

    Appropriate to express sudden waking up.

Quick quiz

  1. Which sentence correctly uses '깨다'?

    다음 중 '깨다'를 올바르게 사용한 문장은?(da-eumjung'kkae-da'reulol-ba-reu-gesa-yong-hanmun-jang-eun?, daeumjung'kkaeda'reulolbareugesayonghanmunjangeun?)
  2. Which sentence cannot use '자다'?

    '자다'를 사용할 수 없는 문장은?('ja-da'reulsa-yong-halsueop-neunmun-jang-eun?, 'jada'reulsayonghalsueopneunmunjangeun?)
  3. What does '깨다' mean?

    '깨다'의 의미는 무엇인가요?('kkae-da'uiui-mi-neunmu-eos-in-ga-yo?, 'kkaeda'uiuimineunmueosingayo?)

What does it mean?

More comparisons to explore

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