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A2 noun 9 min read

수면부족

sumyeonbujok
Examples 수면부족 in 30 Seconds
Explanation 수면부족 in your Level:
At the A1 level, you usually learn simple words for feelings like 'tired' (피곤해요) or 'sleepy' (졸려요). '수면부족' is a bit more advanced because it is a formal noun. However, it is useful to know because you might see it on signs or in simple health advice. Think of it as the formal way to say 'not enough sleep'. You can use it with '때문에' (because of) to explain why you are tired. For example, '수면부족 때문에 피곤해요' (I am tired because of sleep deprivation). It is made of two parts: '수면' (sleep) and '부족' (lack). If you know '부족해요' (it is lacking), you can easily remember this word. At this level, just focus on recognizing the word when you see it in a health context or hearing it in a doctor's office.
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At the A2 level, you can start using '수면부족' to make your Korean sound more precise and professional. Instead of always saying '잠을 못 잤어요' (I couldn't sleep), you can use '수면부족' to describe your state. You should learn to pair it with verbs like '겪다' (to experience) or '있다' (to have). For example, '요즘 수면부족을 겪고 있어요' (I am experiencing sleep deprivation these days). This level also involves understanding basic causal relationships, so using '수면부족으로 인해' (due to sleep deprivation) in simple sentences is a great way to improve your grammar. You will often hear this word in conversations about work, school, or health, especially when discussing why someone is having trouble concentrating.
At the B1 level, you should be comfortable using '수면부족' in both spoken and written Korean. You should understand the difference between '수면부족' (lack of sleep) and '불면증' (insomnia). At this level, you can use the word to discuss social issues, such as the high stress levels of Korean students or the 'overwork' culture in companies. You should be able to form more complex sentences like '수면부족은 만성 피로의 주된 원인 중 하나입니다' (Sleep deprivation is one of the main causes of chronic fatigue). You will encounter this word frequently in news articles, blogs, and documentaries. Practice using it with various particles and in combination with other nouns to form phrases like '수면부족 증상' (symptoms of sleep deprivation).
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At the B2 level, '수면부족' becomes a key term for academic and professional discussion. You should be able to analyze the causes and effects of sleep deprivation on a societal level. You will likely see this word in research summaries or news reports about public health. You should be familiar with more formal collocations like '수면부족을 호소하다' (to complain of sleep deprivation) or '수면부족을 유발하다' (to cause sleep deprivation). At this level, you should also understand the nuance of using Sino-Korean words (Hanja-based) like '수면' versus native words like '잠' to adjust your register. For instance, in an essay, you would exclusively use '수면부족' rather than '잠 부족'.
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At the C1 level, you are expected to use '수면부족' with the precision of a native speaker. You should understand its implications in specialized fields like psychology, medicine, and sociology. You might discuss how '수면부족' affects cognitive functions, metabolic rates, or national productivity. You should be able to use the word in high-level debates, such as '수면부족이 청소년의 정신 건강에 미치는 영향' (The impact of sleep deprivation on the mental health of adolescents). You will also notice more nuanced variations like '수면 결핍' (sleep deficiency) or '수면 장애' (sleep disorder) and know exactly when to use each. Your ability to integrate this word into complex grammatical structures and professional registers should be seamless.
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At the C2 level, you have a complete mastery of '수면부족' and its related terminology. You can discuss the word's etymology, its cultural significance in the 'Miracle Morning' or 'Hard Work' culture of Korea, and its systemic causes in a globalized economy. You can interpret high-level medical literature or legal documents where '수면부족' might be cited as a factor in workplace accidents or negligence. You are able to use the term in sophisticated rhetorical contexts, perhaps using it as a metaphor for a society that never rests. Your understanding extends to the subtle differences in tone between '수면부족', '수면 결핍', and '잠 부족' in various literary and professional styles.
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Examples

수면부족 in 30 Seconds

  • 수면부족 means 'sleep deprivation' or 'lack of sleep'.
  • It is a formal noun often used in health and professional contexts.
  • Commonly paired with '때문에' (because of) or '으로 인해' (due to).
  • Different from '불면증' (insomnia), which is a medical inability to sleep.

The Korean term 수면부족 (sumyeon-bujok) is a formal and technical noun that translates directly to 'sleep deprivation' or 'lack of sleep'. It is a compound word derived from Sino-Korean roots: 수면 (睡眠 - sleep) and 부족 (不足 - deficiency or lack). While in casual English we might simply say 'I didn't sleep much' or 'I'm tired,' Koreans frequently use this specific noun to describe a physiological state or a social issue. In a society known for its 'Pali-pali' (hurry-hurry) culture and intense academic and professional pressure, 수면부족 is a ubiquitous term used in news reports, medical consultations, and workplace conversations.

Etymology
The root 'Su' (睡) means to sleep, and 'Myeon' (眠) also refers to sleep or closing one's eyes. 'Bu' (不) is a negation, and 'Jok' (足) means sufficient. Together, they literally mean 'sleep not sufficient'.

현대인들은 과도한 업무로 인해 만성적인 수면부족에 시달리고 있습니다.

Translation: Modern people are suffering from chronic sleep deprivation due to excessive work.

This word is particularly important because it carries a more serious tone than just saying 'I'm sleepy' (졸려요). When someone uses 수면부족, they are highlighting a deficit that affects their health, productivity, or mental state. It is the standard term used in healthcare to diagnose conditions and in sociology to describe the Korean phenomenon of 'overwork culture.' You will encounter it in health blogs, on the labels of energy drinks, and in discussions about student life during exam periods.

시험 기간이라 수면부족 상태예요.

Translation: I am in a state of sleep deprivation because it is the exam period.

Understanding 수면부족 also offers a window into Korean social structure. The term 'chronic sleep deprivation' (만성 수면부족) is often linked to the high rates of caffeine consumption in South Korea. Because the word is a noun, it often pairs with verbs like '겪다' (to experience), '시달리다' (to suffer from), or '해소하다' (to resolve). In professional settings, mentioning 수면부족 can be a way to explain a lack of focus without sounding lazy, as it implies that the person has been working or studying hard.

Common Collocations
수면부족 증상 (Symptoms of sleep deprivation), 수면부족 해결 (Solving sleep deprivation), 수면부족 원인 (Causes of sleep deprivation).

수면부족은 집중력을 떨어뜨립니다.

Translation: Sleep deprivation decreases concentration.

Finally, it is worth noting that while 수면부족 is the lack of sleep, the inability to sleep is called '불면증' (insomnia). These two are often confused but are distinct. 수면부족 can be voluntary (staying up to watch a drama) or involuntary (having too much work), whereas insomnia is a medical inability to fall or stay asleep. Using the correct term will significantly improve your precision in Korean.

Using 수면부족 effectively requires understanding its role as a noun. It typically functions as the subject or object of a sentence, or as part of a compound noun phrase. Because it is a formal term, it is often paired with specific verbs that describe a state of being or a causal relationship. For example, instead of just saying 'I have sleep deprivation,' Koreans often say 'I am suffering from sleep deprivation' using the verb 시달리다.

Pattern: [Reason] + (으)로 인한 수면부족
This pattern translates to 'sleep deprivation caused by [Reason]'. It is very common in news and health reports.

스트레스로 인한 수면부족은 건강에 해롭습니다.

Translation: Sleep deprivation caused by stress is harmful to health.

Another common way to use it is with the particle 때문에 (because of). This is slightly less formal than 으로 인한 and is frequently heard in daily conversation when explaining why one feels tired or made a mistake. If you are at work and you feel sluggish, you might tell a colleague, '수면부족 때문에 너무 피곤해요' (I'm so tired because of sleep deprivation).

수면부족 때문에 피부가 안 좋아졌어요.

Translation: My skin has gotten worse because of sleep deprivation.

In more advanced contexts, you will see 수면부족 used as an adjective-like modifier for other nouns. For instance, '수면부족 증상' (sleep deprivation symptoms) or '수면부족 상태' (a state of sleep deprivation). This is typical in medical contexts. If you visit a doctor in Korea complaining of fatigue, they might ask, '최근에 수면부족을 느끼시나요?' (Have you been feeling a lack of sleep recently?).

Verb Pairings
수면부족을 겪다 (to experience sleep deprivation), 수면부족을 호소하다 (to complain of sleep deprivation), 수면부족을 유발하다 (to cause sleep deprivation).

카페인 섭취는 수면부족을 유발할 수 있습니다.

Translation: Caffeine intake can cause sleep deprivation.

When talking about the results of sleep deprivation, you can use the structure '수면부족으로 인해 [Result]'. This is very common in essay writing or reporting. For example, '수면부족으로 인해 사고가 발생했습니다' (An accident occurred due to sleep deprivation). This highlights the causal link between the lack of rest and the negative outcome.

장기간의 수면부족은 면역력을 약화시킵니다.

Translation: Long-term sleep deprivation weakens the immune system.

The word 수면부족 is a staple of Korean media and professional discourse. If you turn on a Korean news broadcast, especially during health segments, you will almost certainly hear this term. News anchors use it when reporting on the average sleep hours of Korean teenagers—which are among the lowest in the world—or when discussing the dangers of drowsy driving. In these contexts, 수면부족 is treated as a public health crisis.

News Context
'한국 청소년의 수면부족 문제가 심각합니다.' (The problem of sleep deprivation among Korean youth is serious.)

뉴스에서 수면부족의 위험성에 대해 보도했습니다.

Translation: The news reported on the dangers of sleep deprivation.

In the Korean workplace, 수면부족 is a common 'badge of honor' or a shared grievance. During morning coffee breaks, you might hear colleagues discussing how their late-night projects or long commutes have led to chronic 수면부족. It is a word that bridges the gap between a personal health issue and a professional reality. In this environment, it is often used with the verb '시달리다' (to be plagued by/suffering from), emphasizing the ongoing struggle.

야근 때문에 수면부족인 직장인들이 많습니다.

Translation: There are many office workers who are sleep deprived because of overtime work.

Another place you will hear this word is in educational settings. Korea's high-pressure education system makes 수면부족 a constant companion for high school students, especially those preparing for the CSAT (Suneung). Teachers might warn students that 수면부족 will hinder their memory retention, while students might complain about it as an inevitable part of their 'Susam-sa' (sleep three hours and pass, four hours and fail) lifestyle.

Academic Context
'수험생들은 수면부족으로 인해 건강을 해치기 쉽습니다.' (Examinees are prone to harming their health due to sleep deprivation.)

그 학생은 수면부족에도 불구하고 열심히 공부했습니다.

Translation: That student studied hard despite sleep deprivation.

Finally, doctors and health influencers on platforms like YouTube frequently use 수면부족 when giving advice. You might see video titles like '수면부족을 해결하는 5가지 방법' (5 ways to solve sleep deprivation). It is the standard term for any lack of sleep in a health context, making it a vital word for navigating medical situations or understanding wellness content in Korean.

One of the most common mistakes learners make is confusing 수면부족 (sleep deprivation) with 불면증 (insomnia). While both involve not getting enough sleep, the root causes and medical implications are different. 수면부족 is simply the state of not having enough sleep, which could be due to external factors like work or study. 불면증 is a specific medical condition where a person *cannot* sleep even when they have the time and environment to do so.

Mistake 1: Misusing '불면증'
Incorrect: '어제 게임 하느라 불면증이에요.' (I have insomnia because I played games yesterday.)
Correct: '어제 게임 하느라 수면부족이에요.' (I have sleep deprivation because I played games yesterday.)

수면부족과 불면증은 다른 개념입니다.

Translation: Sleep deprivation and insomnia are different concepts.

Another mistake is using the word as a verb. Remember, 수면부족 is a noun. You cannot say '수면부족해요' like you would say '피곤해요' (I am tired). You must use a verb like '이다' (to be) or '있다' (to have/there is), or a more descriptive verb like '시달리다' (to suffer). Forgetting the noun-verb relationship often results in unnatural-sounding Korean.

저는 지금 수면부족 상태입니다.

Translation: I am currently in a state of sleep deprivation. (Correct usage)

A third common error is incorrect particle usage. Because 수면부족 often describes a cause, learners sometimes use the wrong particle to link it to the effect. While 때문에 is generally safe, using 으로 인해 provides a more professional and precise causal link in writing. Also, ensure you don't confuse the object particle '을' with the subject particle '이' when describing the state of sleep deprivation.

Mistake 2: Particle Confusion
Incorrect: '수면부족이 피곤해요.' (The sleep deprivation is tired - Nonsense)
Correct: '수면부족으로 피곤해요.' (I am tired due to sleep deprivation.)

수면부족 때문에 실수를 했습니다.

Translation: I made a mistake because of sleep deprivation.

Lastly, avoid using 수면부족 when you just mean you are sleepy right now (졸려요). Sleep deprivation refers to the *cumulative* lack of sleep over a period or a specific event of not sleeping enough. If you just yawned because the room is warm, saying you have 수면부족 might sound overly dramatic or clinical to a native speaker.

While 수면부족 is the most formal way to say 'sleep deprivation,' there are several other ways to express similar ideas depending on the context and level of formality. Understanding these nuances will help you sound more like a native speaker and allow you to adapt your language to different situations.

잠 부족 (Jam Bujok)
This is a semi-formal version. It replaces the Sino-Korean '수면' (sumyeon) with the native Korean '잠' (jam). It is very common in daily conversation and text messages. It feels less like a medical diagnosis and more like a personal state.

요즘 잠 부족이라서 주말에 잠만 잤어요.

Translation: I've been lacking sleep lately, so I just slept all weekend.

Another alternative is the phrase 잠을 못 자다 (to not be able to sleep). This is a verb-based expression and is the most common way to talk about a specific instance of not sleeping. While 수면부족 describes the *state*, 잠을 못 자다 describes the *action* (or lack thereof). You would use this when talking to friends about your night.

어제 커피를 많이 마셔서 잠을 못 잤어요.

Translation: I couldn't sleep yesterday because I drank a lot of coffee.

For a more extreme version, you can use 밤을 새우다 (to stay up all night). This is often the cause of 수면부족. If you stayed up all night to finish a report, you would say '밤을 새웠어요.' This is a very common expression among students and office workers in Korea. Often, people will say '밤샘' (staying up all night) as a noun.

수면 결핍 (Sumyeon Gyeolpip)
This is even more formal and scientific than '수면부족'. 'Gyeolpip' means 'deficiency' or 'deprivation' in a more clinical sense. You will find this in academic papers or serious medical journals.

만성적인 수면 결핍은 뇌 기능을 저하시킵니다.

Translation: Chronic sleep deficiency degrades brain function.

Finally, when you want to describe the *feeling* resulting from lack of sleep, you use 피곤하다 (to be tired) or 비몽사몽 (half-asleep, half-awake). 비몽사몽 is an idiomatic expression that perfectly describes the hazy, dreamy state one is in when suffering from severe 수면부족.

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Examples by Level

1

수면부족 때문에 피곤해요.

I am tired because of sleep deprivation.

Noun + 때문에 (because of)

2

잠이 부족해요.

I lack sleep.

Subject + 부족하다 (to be lacking)

3

수면부족은 건강에 안 좋아요.

Sleep deprivation is not good for health.

Topic marker '은/는'

4

어제 수면부족이었어요.

I had sleep deprivation yesterday.

Past tense of '이다' (to be)

5

수면부족이에요? 네.

Is it sleep deprivation? Yes.

Polite ending '에요'

6

커피는 수면부족을 도와줘요.

Coffee helps with sleep deprivation (staying awake).

Object marker '을/를'

7

수면부족은 싫어요.

I hate sleep deprivation.

Adjective '싫다' (to dislike)

8

오늘 수면부족이라서 일찍 자요.

I'm sleep deprived today, so I'm sleeping early.

Reason '-(이)라서'

1

시험 기간에는 수면부족을 겪기 쉬워요.

It's easy to experience sleep deprivation during exam periods.

Verb stem + 기 쉽다 (easy to...)

2

수면부족으로 인해 집중력이 떨어졌어요.

My concentration dropped due to sleep deprivation.

Noun + (으)로 인해 (due to)

3

수면부족 증상이 있나요?

Do you have symptoms of sleep deprivation?

Noun + 증상 (symptom)

4

수면부족은 피부 고민의 원인입니다.

Sleep deprivation is the cause of skin troubles.

Formal ending '입니다'

5

요즘 수면부족 때문에 너무 힘들어요.

These days, it's so hard because of sleep deprivation.

Adverb '너무' (too/very)

6

수면부족을 해결하려면 일찍 자야 해요.

To solve sleep deprivation, you must sleep early.

Verb stem + (으)려면 (if you want to...)

7

그는 수면부족 상태에서 운전했어요.

He drove in a state of sleep deprivation.

Noun + 상태 (state)

8

수면부족은 스트레스를 유발해요.

Sleep deprivation causes stress.

Verb '유발하다' (to cause/trigger)

1

만성적인 수면부족은 면역력을 떨어뜨립니다.

Chronic sleep deprivation lowers immunity.

Adjective '만성적인' (chronic)

2

수면부족을 해결하기 위해 운동을 시작했어요.

I started exercising to solve sleep deprivation.

Verb stem + 기 위해 (in order to)

3

그는 수면부족을 호소하며 병원을 찾았습니다.

He visited the hospital complaining of sleep deprivation.

Verb stem + 며 (while/and)

4

수면부족이 업무 효율에 미치는 영향은 큽니다.

The impact of sleep deprivation on work efficiency is significant.

Noun + 에 미치는 영향 (impact on...)

5

수면부족은 단순한 피로 이상의 문제입니다.

Sleep deprivation is a problem beyond simple fatigue.

Noun + 이상의 (more than...)

6

한국 학생들은 심각한 수면부족에 시달리고 있습니다.

Korean students are suffering from serious sleep deprivation.

Verb '시달리다' (to suffer from)

7

충분한 휴식 없이 일하면 수면부족이 생깁니다.

If you work without enough rest, sleep deprivation occurs.

Noun + 없이 (without)

8

수면부족을 예방하는 가장 좋은 방법은 규칙적인 습관입니다.

The best way to prevent sleep deprivation is regular habits.

Verb stem + 는 것 (making a noun)

1

수면부족이 장기화되면 우울증으로 이어질 수 있습니다.

If sleep deprivation becomes prolonged, it can lead to depression.

Verb stem + (으)면 (if/when)

2

정부는 청소년의 수면부족 문제를 해결하기 위한 대책을 마련했습니다.

The government has prepared measures to solve the problem of sleep deprivation among youth.

Verb stem + 기 위한 (intended for)

3

그 사고의 주된 원인은 운전자의 수면부족으로 밝혀졌습니다.

The main cause of the accident was revealed to be the driver's sleep deprivation.

Verb stem + (으)로 밝혀지다 (to be revealed as)

4

수면부족은 뇌의 인지 기능을 저하시키는 요인입니다.

Sleep deprivation is a factor that degrades the brain's cognitive functions.

Noun + 요인 (factor)

5

현대 사회에서 수면부족은 보편적인 현상이 되었습니다.

In modern society, sleep deprivation has become a universal phenomenon.

Adjective '보편적인' (universal)

6

수면부족을 방치하면 건강이 급격히 악화될 수 있습니다.

If sleep deprivation is neglected, health can deteriorate rapidly.

Verb '방치하다' (to neglect)

7

많은 전문가들이 수면부족의 위험성을 경고하고 있습니다.

Many experts are warning about the dangers of sleep deprivation.

Verb '경고하다' (to warn)

8

수면부족은 성장기 아이들의 발육에 치명적입니다.

Sleep deprivation is fatal to the development of growing children.

Adjective '치명적이다' (to be fatal/critical)

1

수면부족이 경제적 생산성에 미치는 손실은 막대합니다.

The loss that sleep deprivation has on economic productivity is immense.

Adjective '막대하다' (immense)

2

만성 수면부족은 호르몬 불균형을 초래하여 비만을 유발할 수 있습니다.

Chronic sleep deprivation causes hormonal imbalance, which can lead to obesity.

Verb '초래하다' (to bring about/cause)

3

수면부족 상태에서의 의사결정은 평소보다 부정확할 확률이 높습니다.

Decision-making in a state of sleep deprivation has a higher probability of being inaccurate than usual.

Noun + 확률 (probability)

4

디지털 기기의 과도한 사용이 현대인의 수면부족을 심화시키고 있습니다.

Excessive use of digital devices is deepening sleep deprivation in modern people.

Verb '심화시키다' (to deepen/intensify)

5

학업 성취도와 수면부족 사이에는 밀접한 상관관계가 존재합니다.

There is a close correlation between academic achievement and sleep deprivation.

Noun + 상관관계 (correlation)

6

수면부족으로 인한 사회적 비용을 줄이기 위한 노력이 필요합니다.

Efforts are needed to reduce the social costs caused by sleep deprivation.

Noun + 사회적 비용 (social cost)

7

일부 직종에서는 수면부족이 생명과 직결되는 안전 문제로 이어집니다.

In some occupations, sleep deprivation leads to safety issues directly linked to life.

Verb '직결되다' (to be directly linked)

8

수면부족 현상은 개인의 문제를 넘어 사회 구조적 문제로 인식되어야 합니다.

The phenomenon of sleep deprivation should be recognized as a structural social problem beyond an individual issue.

Noun + 을/를 넘어 (beyond...)

1

수면부족이 인지적 가소성에 미치는 장기적 영향에 대한 연구가 활발히 진행 중입니다.

Research on the long-term effects of sleep deprivation on cognitive plasticity is actively underway.

Noun + 인지적 가소성 (cognitive plasticity)

2

수면부족은 전두엽의 기능을 마비시켜 충동 조절 능력을 상실하게 만듭니다.

Sleep deprivation paralyzes the function of the frontal lobe, causing a loss of impulse control.

Verb '상실하다' (to lose/forfeit)

3

현대 자본주의 사회에서 수면부족은 생산성 극대화를 위한 불가피한 희생으로 치부되기도 합니다.

In modern capitalist society, sleep deprivation is sometimes dismissed as an inevitable sacrifice for maximizing productivity.

Verb '치부되다' (to be regarded as)

4

수면부족에 따른 뇌세포의 사멸 기전은 아직 완전히 밝혀지지 않은 영역입니다.

The mechanism of brain cell death due to sleep deprivation is an area that has not yet been fully uncovered.

Noun + 기전 (mechanism)

5

수면부족이 심혈관계 질환의 발병률을 높인다는 역학적 증거가 축적되고 있습니다.

Epidemiological evidence is accumulating that sleep deprivation increases the incidence of cardiovascular disease.

Adjective '역학적' (epidemiological)

6

수면부족은 단순히 잠이 모자란 상태를 넘어, 생체 리듬의 총체적 붕괴를 의미할 수 있습니다.

Sleep deprivation can mean a total collapse of biological rhythms, beyond simply a state of lacking sleep.

Adjective '총체적' (total/holistic)

7

고질적인 수면부족은 유전자 발현 패턴에까지 변형을 일으킬 수 있다는 주장이 제기되었습니다.

Arguments have been raised that chronic sleep deprivation can even cause modifications in gene expression patterns.

Noun + 유전자 발현 (gene expression)

8

수면부족의 사회적 담론은 이제 노동권의 관점에서 재조명되어야 할 시점입니다.

The social discourse on sleep deprivation is now at a point where it needs to be re-examined from the perspective of labor rights.

Noun + 담론 (discourse)

Synonyms

잠 부족 수면 결핍 수면 장애 불면 밤샘 과로 피로 졸음

Antonyms

숙면 충분한 수면 꿀잠 단잠

Common Collocations

수면부족 증상
만성 수면부족
수면부족 원인
수면부족 해결
수면부족 상태
수면부족 호소
수면부족 유발
심각한 수면부족
수면부족 해소
수면부족 위험성

Common Phrases

수면부족 때문에

— Because of sleep deprivation. Used to give a reason.

수면부족 때문에 머리가 아파요.

수면부족으로 인해

— Due to sleep deprivation. More formal than '때문에'.

수면부족으로 인해 사고가 났습니다.

수면부족에 시달리다

— To suffer from sleep deprivation. Emphasizes the pain.

그는 몇 달째 수면부족에 시달리고 있다.

수면부족을 느끼다

— To feel sleep deprived.

요즘 들어 수면부족을 자주 느껴요.

수면부족이 심하다

— Sleep deprivation is severe.

이번 주는 수면부족이 정말 심해요.

수면부족을 겪다

— To experience sleep deprivation.

청소년들이 수면부족을 겪는 경우가 많다.

수면부족을 보충하다

— To make up for lack of sleep.

낮잠으로 수면부족을 보충했어요.

수면부족을 방치하다

— To neglect sleep deprivation.

수면부족을 방치하면 안 됩니다.

수면부족에 빠지다

— To fall into a state of sleep deprivation.

과도한 업무로 수면부족에 빠졌다.

수면부족을 이겨내다

— To overcome sleep deprivation.

그는 수면부족을 이겨내고 성공했다.

Idioms & Expressions

"비몽사몽"

— A state of being half-asleep and half-awake. Often caused by 수면부족.

수면부족으로 하루 종일 비몽사몽이었어요.

Common
"눈꺼풀이 무겁다"

— Literal: Eyelids are heavy. Meaning: Being very sleepy.

수면부족이라 눈꺼풀이 너무 무거워요.

Common
"잠이 보약이다"

— Sleep is the best medicine. Used t

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