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A2 verb 9 min de lectura

사고하다

sagohada

Practícalo Ejemplos Notas y consejos 사고하다 en 30 segundos

Explicación 사고하다 in your Level:

At the A1 level, you usually learn the word '생각하다' (to think) first because it is used in daily life for almost everything. However, you might see '사고' in very simple signs or books. At this stage, just remember that '사고하다' is a 'fancy' way to say 'think.' While you wouldn't use it to say 'I think I like apples,' you might see it in a picture book about humans being special because they can 'think' (사고하다). It is a verb that describes what our brains do when they are working hard. Think of it as a 'robot' or 'scientist' version of thinking. Even though it is a bit advanced, knowing it exists helps you not be confused when you hear '사고' used for both 'accident' and 'thought.' For an A1 learner, just focus on the fact that this word is about using your brain to solve a puzzle or understand something difficult. It is a formal word, so you will see it more in writing than in speaking.

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At the A2 level, you are starting to use more formal Korean. You will encounter '사고하다' in school settings or in simplified news articles. This is the stage where you should begin to distinguish it from '생각하다.' You use '생각하다' for your feelings and simple plans, but you use '사고하다' when you are talking about 'logical thinking' or 'the way people think' (사고방식). For example, if you are describing a smart character in a story, you might say they '사고하는 능력이 뛰어나요' (their thinking ability is excellent). You should also learn the common noun '사고력' (thinking power) which often appears in educational contexts. A2 learners should practice using '사고하다' with adverbs like '깊이' (deeply) to describe a serious mental process. It is important to remember that '사고하다' is a 'Ha-da' verb, so it follows all the standard conjugation rules you've learned. It’s a great word to use if you want to sound more mature and intellectual in your Korean studies.

For B1 learners, '사고하다' becomes a vital part of your academic and professional vocabulary. You are now expected to discuss abstract topics, and '생각하다' is often too simple for these discussions. You will use '사고하다' to describe critical thinking (비판적 사고), logical reasoning (논리적 사고), and creative thinking (창의적 사고). At this level, you should be comfortable using the word in complex sentences, such as '문제를 해결하기 위해 다각도로 사고하는 것이 중요하다' (It is important to think from multiple angles to solve a problem). You will also notice that this word is frequently used in the passive form or as a noun phrase in essays. B1 is the stage where you must be very careful not to confuse '사고하다' (to reason) with '사고가 나다' (to have an accident), as the context of your conversations will become more nuanced. You should start looking for this word in editorials and documentaries to see how it is paired with other high-level vocabulary.

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At the B2 level, you should have a deep understanding of the nuances of '사고하다.' You can distinguish it from synonyms like '사색하다' (to meditate) or '고찰하다' (to examine). You understand that '사고하다' implies a systematic, logical, and often objective cognitive process. You will use this word when discussing psychology, philosophy, or social sciences. For example, you might discuss how '사회적 환경이 개인의 사고하는 방식에 영향을 미친다' (the social environment influences an individual's way of thinking). You are also expected to use the word in formal presentations or debates. B2 learners should be able to recognize the Hanja (思考) and understand how it relates to other words like '고려하다' (to consider) or '사유하다' (to contemplate). This word is a key indicator of your ability to engage with 'Upper Intermediate' materials, where the focus shifts from 'what' you are thinking to 'how' you are thinking.

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C1 learners use '사고하다' as a precise tool for intellectual discourse. At this advanced level, you are not just using the word; you are analyzing the process of '사고' itself. You might explore the differences between '직관적 사고' (intuitive thinking) and '분석적 사고' (analytical thinking). You will encounter '사고하다' in dense academic texts, legal documents, and high-level literature. For a C1 student, the word is often part of complex grammatical structures, such as '사고함에 있어서' (in the act of thinking/reasoning). You understand that '사고하다' is central to the human condition and use it to discuss existential or epistemological questions. You can use it fluently in writing to build persuasive arguments, showing that you have moved beyond simple communication to sophisticated expression. Your usage of this word should reflect a high degree of linguistic precision, choosing it specifically when '생각하다' would lack the necessary intellectual weight.

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At the C2 level, '사고하다' is a word you manipulate with the skill of a native speaker or a scholar. You understand its historical and philosophical connotations in Korean literature and thought. You can discuss the evolution of the concept of '사고' from traditional Confucian reflection to modern Western-influenced logical reasoning. For a C2 learner, '사고하다' is just one point in a vast web of cognitive verbs, and you know exactly when to use it versus '성찰하다' (to reflect upon oneself), '관조하다' (to contemplate/observe), or '심사숙고하다' (to deliberate deeply). You are comfortable reading the works of Korean philosophers who use '사고하다' to define the essence of being. In your own writing, you use the word to create nuanced, rhythmic, and powerful prose. You have a complete grasp of all its collocations and can even play with the word in creative writing or complex rhetorical situations. To you, '사고하다' is not just a verb; it is a fundamental human activity that you can describe with absolute clarity and depth.

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Practícalo Ejemplos Notas y consejos

사고하다 en 30 segundos

A formal verb meaning to engage in logical, systematic, or deep thought and reasoning.
Commonly used in academic, professional, and philosophical contexts rather than casual daily life.
Distinct from '생각하다' (general thinking) and '사고' (accident), requiring active mental effort.
Often paired with adverbs like '논리적으로' (logically) or '비판적으로' (critically) to describe the mode of thought.

The Korean verb 사고하다 (思考하다) is a sophisticated term that translates most accurately to 'to engage in thought,' 'to reason,' or 'to reflect' in English. While the ubiquitous word 생각하다 is the 'Swiss Army knife' of thinking—covering everything from deciding what to eat for lunch to remembering a friend's birthday—사고하다 is reserved for the higher-order cognitive functions. It is the language of the mind at work, systematically analyzing data, navigating philosophical dilemmas, or constructing logical arguments. Understanding this word is a gateway to transitioning from basic conversational Korean to professional and academic proficiency.

Etymological Roots: The word is composed of two Hanja characters: 思 (사) meaning 'to think' or 'to feel' and 考 (고) meaning 'to examine' or 'to test.' Together, they imply a process that is not just passive thought, but an active investigation of ideas.
Intellectual Rigor: When a professor asks students to '사고하다,' they aren't just asking for an opinion; they are asking for a reasoned conclusion based on evidence and logic. It implies a structured approach to cognition.
Distinction from 'Accident': Learners must be careful not to confuse the noun 사고 (事故), which means 'accident,' with the verb 사고하다 (思考하다). While they sound identical in isolation, their usage in sentences and their respective Hanja characters are entirely different.

In contemporary Korean society, the concept of 비판적 사고 (critical thinking) has become a central pillar of the education system. You will frequently encounter 사고하다 in news editorials discussing social issues, in psychology textbooks describing human development, and in business seminars focused on strategic planning. It suggests a level of maturity and seriousness. For instance, an adult '사고한다' deeply about their future career path, whereas a child might simply '생각한다' about playing with toys.

"인간은 스스로 사고하는 능력을 가졌기에 존엄하다."
— (Humans are dignified because they possess the ability to think for themselves.)

Furthermore, the word often appears in the form of 사고력 (thinking power/ability). This refers to one's intellectual capacity to process information. When you are '사고하다,' you are exercising your '사고력.' It is a dynamic verb that captures the essence of the human intellect. Whether you are solving a complex mathematical proof or contemplating the meaning of existence, you are engaging in the act of 사고.

"복잡한 문제를 해결하기 위해서는 다각도로 사고하는 습관이 필요하다."
— (To solve complex problems, one needs the habit of thinking from multiple angles.)

To summarize, 사고하다 is the verb of the intellectual mind. It is intentional, structured, and deep. It is the bridge between perceiving information and understanding its underlying logic or truth. By mastering this word, you demonstrate a high level of linguistic awareness and an ability to discuss abstract concepts in Korean.

Using 사고하다 correctly requires an understanding of its grammatical patterns and its typically formal register. Unlike many action verbs, it is often paired with adverbs that describe the depth or method of thought, such as 깊이 (deeply), 논리적으로 (logically), or 비판적으로 (critically).

Pattern 1: [Adverb] + 사고하다: This is the most common way to specify how someone is reasoning.
Example: "우리는 이 문제를 더 논리적으로 사고해야 합니다." (We must reason through this problem more logically.)
Pattern 2: [Noun]에 대해 사고하다: Used when specifying the object of reflection.
Example: "철학자들은 존재의 의미에 대해 사고한다." (Philosophers reflect on the meaning of existence.)
Pattern 3: 사고하는 [Noun]: Used as an adjective to describe a person or entity characterized by thought.
Example: "사고하는 인간만이 문명을 발전시킬 수 있다." (Only thinking humans can develop civilization.)

One of the key aspects of using this verb is its placement in sentences that involve problem-solving or education. In these contexts, 사고하다 is often used in the ~기 위해 (in order to) or ~려고 (intending to) structures to show the purpose of mental exertion.

"창의적인 아이디어를 얻으려면 고정관념에서 벗어나 사고해야 한다."
— (To get creative ideas, one must think outside of stereotypes.)

In formal writing, such as essays or reports, 사고하다 is preferred over 생각하다 to provide a more academic tone. For example, instead of writing 'I thought about the cause of the problem,' a student would write 'The cause of the problem was 사고되었다' (was reasoned/reflected upon) or 'I 사고하였다' to indicate a professional level of analysis.

When discussing artificial intelligence (AI), 사고하다 is the standard term. People debate whether computers can truly 'think' (사고하다) in the way humans do, or if they are just processing data. This highlights the word's association with consciousness and logic.

"인공지능이 인간처럼 사고할 수 있는 날이 올까요?"
— (Will the day come when AI can think like a human?)

Lastly, remember that 사고하다 is an intransitive verb in many contexts, but it can take an object when used with ~을/를 to mean 'to think [something]'. However, the object is usually a complex concept or a situation, not a physical object. You don't '사고' an apple; you '사고' the concept of an apple.

While you might not hear 사고하다 at a bustling fish market or in a casual chat over coffee, it is a staple in specific environments that define modern Korean intellectual life. If you are a student, a professional, or a consumer of Korean high-culture media, you will encounter this word daily.

1. The Classroom and University Lectures: Korean education is famous for its rigor. Teachers often use this word to encourage students to go beyond rote memorization. Phrases like "스스로 사고하는 힘을 길러야 합니다" (You must develop the power to think for yourselves) are common refrains from elementary school to graduate school.
2. News and Current Affairs: News anchors and commentators use 사고하다 when discussing complex political or social issues. It adds a layer of objectivity and seriousness to the discussion. For example, "국민들이 이 사안에 대해 냉철하게 사고할 필요가 있습니다" (The citizens need to think about this matter with a cool head).
3. Self-Help and Business Literature: Korea has a massive market for self-improvement books. Titles often include variations of 사고의 전환 (a shift in thinking) or 성공하는 사람들의 사고방식 (the way of thinking of successful people). In these contexts, 사고하다 is linked to mindset and strategy.

You will also hear it in documentaries and philosophical discussions on YouTube or television. When a narrator discusses the history of human progress, they will inevitably use 사고하다 to describe the evolution of human consciousness. It is a word that carries the weight of history and the aspiration of the future.

"철학은 인간이 어떻게 사고해야 하는가에 대한 답을 찾는 과정입니다."
— (Philosophy is the process of finding answers to how humans should think.)

In a corporate setting, during a 'brainstorming' session, a manager might say, "자유롭게 사고해 봅시다" (Let's think freely). This invites employees to break away from their usual routines and use their logical and creative faculties to find new solutions. Thus, while it is a formal word, it is actively used to drive innovation and change.

For English speakers, the most common errors when using 사고하다 stem from its phonetic similarity to other words and its specific register. Because Korean has many homophones (words that sound the same but have different meanings), precision is key.

Mistake 1: Confusing 사고 (Thought) with 사고 (Accident): The noun 사고 (事故) means accident. Beginners often try to say 'I had an accident' by saying '사고했어요,' which actually means 'I engaged in logical reasoning.' To say you had an accident, you must use 사고가 나다 (an accident happened) or 사고를 당하다 (to suffer an accident).
Mistake 2: Overusing it in Casual Conversation: Using 사고하다 when you mean 생각하다 in everyday life sounds very unnatural.
Incorrect: "오늘 뭐 먹을지 사고하고 있어." (I'm reasoning about what to eat today.)
Correct: "오늘 뭐 먹을지 생각하고 있어." (I'm thinking about what to eat today.)
Mistake 3: Incorrect Particle Usage: While 생각하다 is often used with ~라고 (to think that...), 사고하다 is rarely used with this quotative particle. It is more commonly used with ~에 대해 (about) or as a standalone process.

Another subtle mistake is failing to recognize the active nature of the word. 사고하다 is something you do with effort. If a thought just pops into your head, that is 생각이 나다 (a thought occurs), never 사고하다. The latter requires your brain to be 'on' and working through a problem.

"논리적 오류 없이 사고하기는 생각보다 어렵다."
— (Reasoning without logical fallacies is harder than one might think.)

Finally, learners sometimes confuse 사고하다 with 사색하다 (to meditate/muse). While both are deep, 사색하다 is more poetic and quiet, often done while walking in nature. 사고하다 is more analytical and goal-oriented. Choosing the right one shows you understand the 'flavor' of the mental activity.

To truly master 사고하다, you must see how it fits into the broader family of Korean 'thinking' verbs. Each word has its own specific context and emotional weight.

생각하다 (To Think): The most general term. Used for opinions, memories, plans, and simple mental states.
Comparison: '생각하다' is like walking; '사고하다' is like running a marathon of the mind.
사색하다 (To Meditate / Contemplate): Focuses on deep, often solitary reflection. It is more emotional or spiritual than logical.
Comparison: You '사고' to solve a math problem, but you '사색' to understand the beauty of a poem.
고찰하다 (To Examine / Investigate): A very formal academic term, often used in research papers to mean 'to examine a subject in depth.'
Comparison: '사고하다' is the internal process; '고찰하다' is often the external expression of that process in writing or speech.
판단하다 (To Judge / Decide): The end result of reasoning.
Comparison: You '사고' (reason) in order to '판단' (judge) what the best course of action is.

Another interesting alternative is 추론하다 (to infer/deduce). This is a subset of 사고하다 that specifically focuses on drawing conclusions from premises. In a logic class, you would use both words frequently.

"우리는 주어진 정보를 바탕으로 논리적으로 추론하며 사고해야 합니다."
— (We must think while logically inferring based on the given information.)

By distinguishing between these synonyms, you can express your thoughts with much greater precision. For example, saying you are 사색 중 (in the middle of contemplation) suggests you shouldn't be disturbed, while saying you are 사고 중 (in the middle of reasoning) suggests you are working on a specific intellectual task.

How Formal Is It?

Dato curioso

The character 思 (사) is composed of 'field' (田) and 'heart' (心), suggesting that thinking is like cultivating a field in your heart. The character 考 (고) originally depicted an elderly person with a cane, implying the wisdom that comes with age and examination.

Guía de pronunciación

UK [sa.ɡo.ɦa.da]

US [sa.ɡo.ɦa.da]

No specific stress on individual syllables, as Korean is a syllable-timed language. Maintain a steady pace.

Rima con

보고하다 (to report) 공고하다 (to announce) 수고하다 (to work hard) 경고하다 (to warn) 권고하다 (to advise) 재고하다 (to reconsider) 숙고하다 (to deliberate) 최고하다 (to be the best - though as an adjective)

Errores comunes

Pronouncing '사고' like 'Sago' (the pudding) with a long 'a'.
Putting too much breath on the 'g' in 'go', making it sound like 'ko'.
Confusing the intonation with the word for accident (though they are homonyms).

Nivel de dificultad

Lectura 3/5

Common in news and books, but requires Hanja knowledge for deep understanding.

Escritura 4/5

Hard to use naturally without sounding overly formal.

Expresión oral 4/5

Rarely used in speech except in professional or educational settings.

Escucha 3/5

Easy to hear but can be confused with 'accident' (사고).

Qué aprender después

Requisitos previos

생각하다 머리 이유 문제 공부

Aprende después

사색하다 고찰하다 논리적 비판적 추론하다

Avanzado

형이상학 인식론 주체성 객관성 합리성

Gramática que debes saber

-는 것 (Gerund)

사고하는 것은 어렵다.

-기 위해 (Purpose)

사고하기 위해 조용한 곳으로 갔다.

-ㄹ 수 있다 (Ability)

누구나 사고할 수 있다.

-아야/어야 하다 (Obligation)

우리는 더 넓게 사고해야 한다.

-게 되다 (Becoming)

책을 읽으며 더 많이 사고하게 되었다.

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Ejemplos por nivel

우리는 머리로 사고해요.

We think with our heads.

Simple present tense with -해요.

사람은 사고하는 동물입니다.

Humans are thinking animals.

-는 adjective form modifying '동물'.

깊이 사고하세요.

Please think deeply.

Imperative -세요 form.

아이들도 사고할 수 있어요.

Children can think too.

-ㄹ 수 있다 (can) structure.

어떻게 사고해요?

How do you think?

Interrogative '어떻게' with present tense.

사고하는 것은 중요해요.

Thinking is important.

-는 것 (gerund) as a subject.

천천히 사고해 보세요.

Try thinking slowly.

-어 보다 (try doing) structure.

로봇은 사고할 수 없어요.

Robots cannot think.

Negative -ㄹ 수 없다.

이 문제를 논리적으로 사고해 봅시다.

Let's think about this problem logically.

-읍시다 (let's) formal suggestion.

사고하는 방식이 사람마다 달라요.

The way of thinking is different for each person.

사고하는 방식 (way of thinking) noun phrase.

창의적으로 사고하는 연습을 해요.

Practice thinking creatively.

Adverb '창의적으로' + verb.

그는 깊이 사고한 후에 대답했다.

He answered after thinking deeply.

-ㄴ 후에 (after doing) structure.

사고력을 기르는 책을 읽어요.

I read books that develop thinking power.

사고력 (thinking power) compound noun.

우리는 미래에 대해 사고해야 합니다.

We must think about the future.

-해야 하다 (must/should).

사고하는 습관은 아주 좋습니다.

The habit of thinking is very good.

Habit (습관) as the subject.

질문을 통해 더 많이 사고하게 돼요.

You come to think more through questions.

-게 되다 (come to/become).

비판적으로 사고하는 능력은 필수적이다.

The ability to think critically is essential.

비판적 사고 (critical thinking) as a fixed concept.

그 철학자는 존재의 본질에 대해 사고했다.

The philosopher reflected on the essence of existence.

~에 대해 (about) with past tense.

우리는 감정에 치우치지 않고 사고해야 한다.

We must think without being biased by emotions.

-지 않고 (without doing) negation.

복잡한 사회 현상을 사고하는 것은 어렵다.

It is difficult to reason through complex social phenomena.

Complex noun phrase as subject.

다양한 관점에서 사고하려고 노력하세요.

Try to think from various perspectives.

-으려고 노력하다 (effort to do).

인공지능이 인간처럼 사고할 수 있을까?

Can artificial intelligence think like a human?

Interrogative -ㄹ 수 있을까? (Wondering).

사고의 과정을 논리적으로 설명해 보세요.

Try explaining the process of thought logically.

사고의 과정 (process of thought).

그는 매일 조용히 사고하는 시간을 갖는다.

He has a time to think quietly every day.

Relative clause modifying '시간'.

합리적으로 사고하지 않으면 오류에 빠지기 쉽다.

If you don't think rationally, it's easy to fall into error.

-지 않으면 (if not) conditional.

교육의 목적은 스스로 사고하는 사람을 만드는 것이다.

The purpose of education is to create people who think for themselves.

-는 것이다 (it is that...) structure.

데이터를 분석하고 사고하는 능력이 요구됩니다.

The ability to analyze data and reason is required.

Passive voice '요구됩니다'.

그의 사고하는 방식은 매우 독특하고 창의적이다.

His way of thinking is very unique and creative.

Parallel adjectives with -고.

편견 없이 사고하는 것은 성숙함의 증거이다.

Thinking without prejudice is evidence of maturity.

'증거' (evidence) as a predicate noun.

우리는 끊임없이 변화하는 세상을 사고해야 한다.

We must reason about a constantly changing world.

Present participle '변화하는' modifying '세상'.

과학적 방법론은 체계적으로 사고하는 법을 가르친다.

Scientific methodology teaches how to think systematically.

-는 법 (how to/way to).

인간의 존엄성은 사고하는 능력에서 비롯된다.

Human dignity stems from the ability to think.

-에서 비롯된다 (originates from).

철학적 사유란 근본적인 원리에 대해 사고하는 과정이다.

Philosophical contemplation is the process of thinking about fundamental principles.

Definition structure using '~란 ~이다'.

주체적으로 사고하지 못하는 개인은 선동에 취약하다.

Individuals who cannot think independently are vulnerable to propaganda.

-지 못하는 (cannot) negation.

사고의 지평을 넓히기 위해 고전 문학을 탐독한다.

I read classical literature extensively to broaden the horizons of my thought.

사고의 지평 (horizon of thought) metaphor.

현대 사회의 복잡성은 고도의 사고력을 요구한다.

The complexity of modern society demands a high level of thinking power.

High-level vocabulary like '복잡성' and '고도의'.

객관적으로 사고하려는 노력은 학문의 기초가 된다.

The effort to think objectively is the foundation of scholarship.

-려는 노력 (effort to).

언어는 우리가 사고하는 틀을 형성한다.

Language forms the framework in which we think.

Metaphorical '틀' (frame).

그는 현상의 이면을 날카롭게 사고하는 통찰력을 지녔다.

He possessed the insight to sharply reason about the hidden side of phenomena.

'이면' (hidden side) and '통찰력' (insight).

윤리적 딜레마 상황에서 어떻게 사고해야 할까?

How should one reason in a situation of ethical dilemma?

-해야 할까? (rhetorical/deliberative question).

사고의 메커니즘을 규명하는 것은 뇌과학의 궁극적 과제이다.

Identifying the mechanism of thought is the ultimate task of neuroscience.

Academic terms '메커니즘' and '규명하다'.

인간은 실존적 위기 속에서 비로소 깊게 사고하게 된다.

Humans finally come to think deeply amidst an existential crisis.

'비로소' (finally/at last) emphasizing a turning point.

형이상학적 주제를 사고함에 있어 언어의 한계에 부딪힌다.

In thinking about metaphysical themes, one encounters the limits of language.

-함에 있어 (in the act of/when it comes to).

비판적 사고를 결여한 지식은 단순한 정보의 나열에 불과하다.

Knowledge lacking critical thinking is nothing more than a listing of simple information.

~에 불과하다 (nothing more than).

사고하는 주체로서의 자아를 확립하는 것이 중요하다.

It is important to establish the self as a thinking subject.

'주체로서의' (as a subject).

포스트모더니즘은 전통적인 사고 방식을 해체하고 재구성한다.

Postmodernism deconstructs and reconstructs traditional ways of thinking.

Specialized academic terminology.

초월적 가치에 대해 사고하는 것은 인간만의 특권이다.

Thinking about transcendental values is a privilege unique to humans.

'초월적' (transcendental) and '특권' (privilege).

논리적 사고의 엄밀함이 결여된 주장은 설득력을 잃는다.

Arguments lacking the rigor of logical thought lose their persuasiveness.

'엄밀함' (rigor/strictness) and '설득력' (persuasiveness).

Colocaciones comunes

논리적으로 사고하다

비판적으로 사고하다

창의적으로 사고하다

사고하는 능력

사고하는 방식

깊이 사고하다

객관적으로 사고하다

합리적으로 사고하다

다각도로 사고하다

체계적으로 사고하다

Frases Comunes

사고력을 기르다

— To develop or cultivate one's thinking power. Used often in education.

독서는 사고력을 기르는 데 도움을 준다.

사고의 전환

— A shift or change in one's way of thinking.

새로운 아이디어를 위해 사고의 전환이 필요하다.

사고방식

— Mindset or way of thinking.

세대마다 사고방식이 다를 수 있다.

사고의 지평

— The horizon/scope of one's thoughts.

여행은 사고의 지평을 넓혀준다.

사고의 자유

— Freedom of thought.

인간에게는 사고의 자유가 보장되어야 한다.

사고 체계

— A system of thought.

그의 사고 체계는 매우 치밀하다.

사고 작용

— The process or action of thinking.

뇌의 사고 작용은 매우 복잡하다.

사고의 틀

— A framework of thought; a paradigm.

기존의 사고의 틀에서 벗어나야 한다.

사고의 오류

— An error in reasoning; a logical fallacy.

그의 논문에는 몇 가지 사고의 오류가 있다.

사고의 깊이

— The depth of one's thoughts.

그는 사고의 깊이가 남다른 학생이다.

Se confunde a menudo con

사고하다 vs 사고 (accident)

Identical sound/spelling in Hangeul. Must distinguish by context (accident vs. thought).

사고하다 vs 생각하다

'생각하다' is broad; '사고하다' is analytical/deep.

사고하다 vs 사색하다

'사색하다' is poetic/meditative; '사고하다' is logical/structured.

Modismos y expresiones

"머리를 굴리다"

— To rack one's brains or think hard (casual/idiomatic).

어떻게 하면 돈을 벌지 머리를 굴리고 있다.

Informal

"생각에 잠기다"

— To be lost in thought.

그는 창밖을 보며 깊은 생각에 잠겼다.

Neutral

"머리를 맞대다"

— To put heads together; to consult.

우리는 문제를 해결하기 위해 머리를 맞댔다.

Neutral

"무릎을 치다"

— To slap one's knee (sudden realization/thought).

좋은 생각이 떠올라 무릎을 쳤다.

Informal

"골머리를 앓다"

— To suffer from a headache (to worry/think too much about a problem).

그는 세금 문제로 골머리를 앓고 있다.

Informal

"눈앞이 캄캄하다"

— To be at a loss for words or thoughts (cluelessness).

시험지를 보니 눈앞이 캄캄했다.

Informal

"뒷북을 치다"

— To 'hit the drum late' (to think of something too late).

다 끝난 뒤에 아이디어를 내면 뒷북치는 격이다.

Slang/Informal

"한 치 앞을 못 보다"

— To not be able to see even an inch ahead (short-sighted thinking).

그는 한 치 앞을 못 보고 어리석은 결정을 내렸다.

Neutral

"우물 안 개구리"

— A frog in a well (someone with a narrow way of thinking).

세상을 모르는 사람은 우물 안 개구리와 같다.

Informal

"산 넘어 산"

— Mountain after mountain (thinking about endless problems).

인생은 정말 산 넘어 산이구나.

Informal

Fácil de confundir

사고하다 vs 사고 (事故)

Homonym

事故 means accident/incident. 思考 means thought/reasoning. You '당하다' (suffer) an accident but '하다' (do) a thought.

사고가 났어요 (An accident happened) vs 사고를 했어요 (I reasoned).

사고하다 vs 생각

Synonym

생각 is the generic term. 사고 is the academic/logical term.

밥 생각 나 (Thinking of food) vs 사고 작용 (Cognitive process).

사고하다 vs 고려 (考慮)

Similar meaning

고려하다 means 'to consider' or 'to take into account' when making a decision. 사고하다 is the general act of reasoning.

여러 조건을 고려하다 (Consider conditions).

사고하다 vs 반성 (反省)

Internal thought

반성하다 is specifically to reflect on one's own mistakes. 사고하다 is to reason about any topic.

잘못을 반성하다 (Reflect on a mistake).

사고하다 vs 상상 (想像)

Mental activity

상상하다 is to imagine things that aren't there. 사고하다 is to reason about reality or logic.

우주 여행을 상상하다 (Imagine space travel).

Patrones de oraciones

[Noun]에 대해 사고하다

미래에 대해 사고하다.

[Adverb] 사고하는 습관

논리적으로 사고하는 습관.

사고할 수 있는 능력

스스로 사고할 수 있는 능력.

사고의 과정을 설명하다

자신의 사고의 과정을 설명하다.

사고의 전환을 꾀하다

새로운 아이디어를 위해 사고의 전환을 꾀하다.

사고의 지평을 넓히다

독서는 사고의 지평을 넓혀준다.

사고의 틀을 깨다

기존의 사고의 틀을 깨야 한다.

사고하는 주체로서의 인간

사고하는 주체로서의 인간은 존엄하다.

Familia de palabras

Sustantivos

사고 (thought/reasoning)

사고력 (thinking ability)

사고방식 (way of thinking)

사고법 (method of thinking)

사유 (contemplation)

Verbos

사고하다 (to reason)

사유하다 (to contemplate)

사색하다 (to muse)

Adjetivos

사고적 (thoughtful/reflective)

사유적 (contemplative)

Relacionado

생각 (thought)

논리 (logic)

이성 (reason)

지성 (intellect)

비판 (criticism)

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Cómo usarlo

frequency

Medium-High in written/academic Korean; Low in spoken casual Korean.

Errores comunes

Using '사고하다' for 'I have a thought'. → 생각이 나다 / 생각이 들다.
'사고하다' is an intentional process, not a spontaneous occurrence.
Saying '사고했어요' for 'I had a car accident'. → 사고가 났어요 / 사고를 당했어요.
'사고하다' only means 'to reason'. For accidents, use the noun '사고' with '나다'.
Using '사고하다' to mean 'I like/think that...'. → ~라고 생각하다.
'사고하다' is not used as a quotative verb for personal opinions in casual speech.
Pairing '사고하다' with lighthearted topics (e.g., pizza). → 먹고 싶다 / 생각하다.
It sounds too serious and analytical for trivial matters.
Confusing '사고' with '사과' (apple/apology). → 사고 (thought) vs 사과 (apple).
Check your vowels! 'o' vs 'wa'.

Consejos

Academic Writing

Whenever you write an essay for TOPIK, use 사고하다 instead of 생각하다 to gain more points for advanced vocabulary.

Active Effort

Remember that 사고하다 implies you are trying. It's not a passive thought that just hits you.

Particle Choice

Use '~에 대해' (about) or '~를' (object) for the topic of your reasoning.

Compound Nouns

Learn '사고방식' (mindset) early; it's one of the most useful words in Korean culture.

Context Clues

If you hear '사고' in a hospital or police context, it's 'accident'. In a school or library, it's 'thought'.

Value of Thought

In Korea, being a '사고하는 사람' is a mark of high character and education.

Socrates

Associate 'Sago' with 'Socrates' to remember it means deep, philosophical thinking.

Presentations

Use this word during presentations to show you have analyzed the data thoroughly.

Editorials

Look for this word in the first paragraph of news editorials; it usually sets the tone for the analysis.

Reflection

When writing about your 'growth', use '사고의 깊이가 깊어졌다' (my depth of thought has deepened).

Memorízalo

Mnemotecnia

Think of 'Socrates' (사고-rates). He was the ultimate person who loved to 사고하다 (reason/think) about everything.

Asociación visual

Imagine a scientist in a lab coat inside your brain, carefully organizing files and using a magnifying glass to look at ideas. That is '사고하다'.

Word Web

Logic Brain School Philosophy Analysis Reason Mind Problem-solving

Desafío

Try to write three sentences about a complex global issue using '사고하다'. Don't use '생각하다' at all!

Origen de la palabra

Derived from Sino-Korean Hanja characters: 思考 (사고).

Significado original: 思 (사) means 'to think/field of thought' and 考 (고) means 'to investigate/examine'. Together they mean 'to investigate through thinking'.

Sino-Korean (Hanja-based vocabulary).

Contexto cultural

Be careful not to sound too 'stiff' or 'robotic' by using this word in casual settings with friends. It can come off as pretentious if overused.

English speakers use 'think' for almost everything. In Korean, using '사고하다' signals you are entering a serious, intellectual space.

'The Thinker' (Rodin's statue) is often described in Korean as '사고하는 사람' or '생각하는 사람'. Descartes' 'I think, therefore I am' is translated as '나는 생각한다, 고로 존재한다', but in philosophy classes, it is often explained through the lens of '사고'.

Practica en la vida real

Contextos reales

University Lecture

교수님이 사고력을 강조하셨다.
이 이론에 대해 사고해 보세요.

Job Interview

저는 논리적으로 사고하는 인재입니다.
문제 해결을 위해 어떻게 사고하나요?

News Report

정치적 사고가 필요한 시점입니다.
국민들의 사고방식이 변하고 있습니다.

Philosophy Book

인간은 사고하는 갈대이다.
사고의 본질을 탐구하다.

Scientific Paper

데이터를 통해 사고한 결과...
사고의 오류를 수정하다.

Inicios de conversación

"당신은 평소에 어떤 방식으로 사고하나요?"

"인공지능이 인간처럼 사고할 수 있다고 믿으세요?"

"비판적으로 사고하는 것이 왜 중요할까요?"

"창의적인 사고를 위해 무엇을 하시나요?"

"한국인들의 사고방식에 대해 어떻게 생각하세요?"

Temas para diario

오늘 내가 가장 깊게 사고했던 주제는 무엇인가?

나의 사고방식은 5년 전과 어떻게 달라졌는가?

논리적으로 사고하는 것이 감정적으로 느끼는 것보다 항상 좋은가?

사고력을 기르기 위해 내가 할 수 있는 노력들.

복잡한 문제를 만났을 때 나의 사고 과정 기록해보기.

Preguntas frecuentes

10 preguntas

Not really. For 'I think that [opinion]', you should use '~라고 생각하다'. '사고하다' is the act of reasoning itself, not usually a quotative verb for opinions.

No, but it describes the 'smart' or 'logical' part of everyone's brain. It's used to describe the human capacity for logic.

Because it appears very early in Korean textbooks when discussing 'What makes humans special' or in 'Critical Thinking' lessons, which are common in A2-level reading materials.

Yes, '사고되다' can be used in academic writing, though it is less common than '고찰되다'.

지능 is 'intelligence' (raw capacity), while 사고력 is 'thinking power' (the ability to use that intelligence to reason).

No! That would sound like you are performing a logical analysis of the person. Use '생각하고 있어'.

Yes, 考 (고), which means to examine or test. It's the same 'go' as in '시험' (examination - though that's 考 in some contexts, strictly it's 考 in 考査).

비판적 사고 (Bipan-jeok Sago).

This is a common debate in Korea. Usually, people say AI 'processes' (처리하다) but scientists discuss if they can '사고하다'.

Yes, if you are writing about a serious topic or reflecting on a difficult problem you solved.

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