B2 adjective 3 min read

불합리적이다

Something is irrational or unreasonable when it does not make sense or follow logic.

bulhamnijeogida

Explanation at your level:

This word is for when things are not fair. If you have a rule that is silly, you can say it is 불합리적이다. It means 'no logic here!' Use it when you are sad because something is not right.

You use this word to describe bad rules or unfair choices. If a teacher gives you too much homework, you can say, 'That is 불합리적이다.' It is a very useful word for when you want to show you are unhappy with a plan.

In intermediate Korean, you will use this to challenge ideas. It is common in debates. Instead of just saying 'I don't like it,' you say, 'That is 불합리적이다,' which means you have a logical reason for your disagreement. It sounds more professional and mature.

At this level, you can use it to critique systems, such as workplace policies or social norms. It shows you understand the nuance between 'unfair' and 'lacking logical foundation.' It is a staple in formal writing and argumentative essays.

Advanced speakers use this to dissect complex situations. You might describe a '불합리적인 모순' (irrational contradiction) in a political system. It allows for a sophisticated level of discourse, signaling that you aren't just reacting emotionally, but analyzing the underlying logic of a problem.

At the mastery level, you understand the philosophical weight of the word. It connects to the history of rationalism in Korean thought. You can use it to describe abstract concepts, like '불합리적인 현실' (the irrational nature of reality), showing deep cultural and linguistic integration.

Word in 30 Seconds

  • Means irrational or unreasonable.
  • Used to criticize logic or fairness.
  • Common in formal and professional settings.
  • Antonym is 합리적이다 (rational).

The term 불합리적이다 is a powerful adjective in Korean used to label something as irrational or unreasonable. When you use this word, you are essentially pointing out that a situation, a person's behavior, or a set of rules fails the test of logic.

Think of it as a red flag for things that just don't add up. If a boss asks you to finish a week's worth of work in one hour, that is a classic example of something that is 불합리적. It isn't just difficult; it is fundamentally disconnected from reality or fairness. Using this word effectively communicates that you are thinking critically about the situation at hand.

The word is built upon the Sino-Korean roots 불 (不), meaning 'not,' and 합리 (合理), meaning 'reason' or 'rationality.' The suffix -적이다 turns the concept into an adjective, effectively meaning 'having the quality of.' Historically, these characters trace back to classical Chinese philosophy, where li (reason/principle) was a central pillar of Confucian thought.

By combining these, the Korean language created a precise tool to describe the absence of li. Over centuries, this term evolved from philosophical discourse into everyday language. It reflects a cultural emphasis on harmony and logic, where being 'unreasonable' is viewed as a disruption to the natural order of social interaction.

You will hear 불합리적이다 in both professional and casual settings. In a business context, it is often used to describe 불합리적인 관행 (unreasonable practices) or 불합리한 처사 (unreasonable treatment). It carries a weight of seriousness, so use it when you want to make a formal complaint or express strong disagreement.

In casual conversation, you might say someone's demand is 불합리적이야 to emphasize that they aren't listening to reason. It is a register-neutral word, but because it sounds intellectual, it often commands more attention than simpler words like 'unfair' (억울하다).

While there aren't many direct idioms, the word is often used in set phrases:

  • 불합리한 처사 (Unreasonable treatment/action)
  • 불합리함을 느끼다 (To feel the unreasonableness of something)
  • 불합리적 구조 (Irrational structure/system)
  • 불합리한 요구 (Unreasonable demand)
  • 불합리성을 따지다 (To question the irrationality of something)
These phrases help you sound more like a native speaker when debating or arguing a point.

Grammatically, 불합리적이다 functions as a descriptive verb (adjective). You can conjugate it to 불합리적인 (the modifier form) or 불합리해서 (because it is unreasonable). It is a stable, reliable word that doesn't change based on gender or number.

Pronunciation-wise, focus on the 'm' and 'n' sounds. It is pronounced /bul-ham-ni-jeok-i-da/. A common mistake is to mumble the 'ni' sound, but articulating it clearly makes you sound much more confident. Rhyming or similar-sounding concepts include 비논리적이다 (illogical), which is a great synonym to keep in your back pocket.

Fun Fact

The character '理' (li) is central to East Asian philosophy, representing the order of the universe.

Pronunciation Guide

UK N/A

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US N/A

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Common Errors

  • Mispronouncing the 'ni' sound
  • Merging 'jeok' and 'i'
  • Weakening the 'bul' sound

Rhymes With

합리적이다 논리적이다 비논리적이다 체계적이다 비판적이다

Difficulty Rating

Reading 2/5

Common in news and essays

Writing 2/5

Requires formal structure

Speaking 2/5

Useful for debates

Listening 2/5

Frequently heard in media

What to Learn Next

Prerequisites

합리적 논리 규칙

Learn Next

비합리적 부당하다 모순

Advanced

형이상학 도그마

Grammar to Know

-적이다 suffix

합리적이다, 비판적이다

Subject marking particles

이/가

Noun modification

불합리적인 + Noun

Examples by Level

1

그 규칙은 불합리적이다.

That rule is unreasonable.

Simple subject-complement structure.

2

정말 불합리적이야!

It is really unreasonable!

Casual ending.

3

불합리적이지 않아요.

It is not unreasonable.

Negative form.

4

이건 불합리적이다.

This is unreasonable.

Demonstrative pronoun.

5

왜 불합리적인가요?

Why is it unreasonable?

Question form.

6

불합리적인 생각이다.

It is an irrational thought.

Modifier form.

7

그것은 불합리적이다.

That thing is unreasonable.

Formal subject.

8

항상 불합리적이다.

It is always unreasonable.

Adverb usage.

1

그의 제안은 너무 불합리적이다.

2

불합리적인 처사는 그만두세요.

3

우리는 불합리적인 상황에 처했다.

4

그 결정은 불합리적이라고 생각한다.

5

불합리적임을 인정해라.

6

이런 불합리적인 일은 처음이다.

7

불합리적이라는 비판을 받았다.

8

상황이 매우 불합리적이다.

1

불합리적인 관행을 개선해야 한다.

2

그의 말은 논리적으로 불합리적이다.

3

불합리한 요구를 거절할 권리가 있다.

4

그런 불합리적인 이유를 대지 마라.

5

불합리적인 구조를 바꾸는 것은 어렵다.

6

그는 불합리적인 태도로 일관했다.

7

불합리적인 결과가 예상된다.

8

사회적 불합리적 요소들을 제거하자.

1

불합리적 처사에 대해 정식으로 항의했다.

2

그 정책은 불합리적이라는 평가를 받았다.

3

불합리적인 관습을 타파하는 것이 중요하다.

4

그의 주장은 불합리적 모순을 내포하고 있다.

5

불합리적인 시스템이 비효율을 초래한다.

6

불합리적이라는 사실을 간과해서는 안 된다.

7

우리는 불합리적인 현실과 타협할 수 없다.

8

그는 불합리적인 결론을 도출했다.

1

불합리적인 체계는 장기적으로 지속될 수 없다.

2

그의 논리는 불합리적 귀결로 이어졌다.

3

불합리적인 권력 구조는 반드시 붕괴한다.

4

역사적 불합리성을 지적하는 것은 중요하다.

5

불합리적인 법 조항을 개정하라는 목소리가 높다.

6

그는 불합리적인 상황을 합리화하려고 했다.

7

불합리적인 관념에서 벗어나는 것이 필요하다.

8

불합리적이라는 비난은 피할 수 없었다.

1

불합리적인 실존적 고뇌를 문학적으로 승화시켰다.

2

그의 사상은 당대의 불합리적인 시대상을 반영한다.

3

불합리적인 도그마에 갇힌 사회를 비판했다.

4

불합리적인 인과관계가 드러나는 순간이었다.

5

불합리적인 관습의 굴레를 벗어던지다.

6

불합리적인 형이상학적 논쟁에 불과하다.

7

그는 불합리적인 운명에 맞서 싸웠다.

8

불합리적인 세계관을 해체하는 과정이다.

Common Collocations

불합리적인 관행
불합리한 요구
불합리적인 결정
불합리함을 느끼다
불합리적인 구조
불합리적인 처사
불합리적인 태도
불합리성을 지적하다
불합리적인 결과
불합리적인 상황

Idioms & Expressions

"불합리한 처사에 항의하다"

To protest against unfair treatment

우리는 불합리한 처사에 항의하기로 했다.

formal

"불합리성을 따지다"

To question the logic/fairness

그는 모든 것의 불합리성을 따지려 했다.

formal

"불합리한 관습을 타파하다"

To break down irrational traditions

새 시대에는 불합리한 관습을 타파해야 한다.

formal

"불합리한 요구를 일삼다"

To habitually make unreasonable demands

그는 항상 불합리한 요구를 일삼는다.

neutral

"불합리적인 굴레"

A cycle of irrationality

불합리적인 굴레에서 벗어나야 한다.

literary

"불합리한 현실과 타협하다"

To compromise with an irrational reality

나는 불합리한 현실과 타협하고 싶지 않다.

neutral

Easily Confused

불합리적이다 vs 비합리적이다

Almost identical meaning.

비합리적 is 'non-rational', 불합리적 is 'unreasonable/irrational'.

They are often interchangeable.

불합리적이다 vs 부당하다

Both imply something is wrong.

부당하다 is about justice, 불합리적 is about logic.

부당한 대우 (Unfair treatment) vs 불합리한 규칙 (Unreasonable rule).

불합리적이다 vs 비논리적이다

Both relate to logic.

비논리적 is strictly 'lacking logic', 불합리적 is 'lacking reason/fairness'.

비논리적인 말 (Illogical speech).

불합리적이다 vs 억지스럽다

Both describe unreasonable things.

억지스럽다 implies someone is forcing a point.

억지스러운 주장 (Forced/absurd claim).

Sentence Patterns

A1

Subject + 은/는 + 불합리적이다

그 규칙은 불합리적이다.

B1

불합리적인 + Noun + 을/를 + Verb

불합리적인 요구를 거절했다.

B1

불합리적이라고 + 생각하다/말하다

그것이 불합리적이라고 생각한다.

B2

불합리함 + 을 + 느끼다/지적하다

나는 불합리함을 느꼈다.

B2

불합리적인 + 상황에 + 처하다

불합리적인 상황에 처했다.

Word Family

Nouns

불합리 Irrationality

Adjectives

합리적이다 Rational

Related

논리 Logic (root concept)

How to Use It

frequency

7

Formality Scale

Formal/Academic Neutral Casual N/A

Common Mistakes

Using '불합리적이다' for things that are just 'hard'. Use '힘들다' or '어렵다'.
불합리적 implies a lack of logic, not just difficulty.
Confusing it with '부당하다' (unfair). Check if the issue is logic (불합리) or justice (부당).
They overlap but have different focuses.
Using it as a noun. Use '불합리' as the noun.
The -적이다 ending makes it an adjective.
Overusing it in every argument. Use it only when logic is specifically lacking.
Overuse makes the speaker sound aggressive.
Ignoring the modifier form. Use '불합리적인' before a noun.
Grammar requires the modifier form for nouns.

Tips

💡

Memory Palace Trick

Imagine a judge hitting a gavel because a law is '불합리적이다'.

💡

When Native Speakers Use It

When they want to challenge a decision at work.

🌍

Cultural Insight

It reflects the Korean value of logical order.

💡

Grammar Shortcut

Remember the -적이다 ending turns nouns into adjectives.

💡

Say It Right

Practice the 'bul-ham-ni' rhythm.

💡

Don't Make This Mistake

Don't confuse it with 'unfair' (부당한).

💡

Did You Know?

It shares roots with the word for 'rational' (합리적).

💡

Study Smart

Learn it alongside its antonym, 합리적이다.

💡

Contextual usage

Use it to add weight to your arguments.

💡

Slow down

Say it slowly to ensure the 'ni' sound is clear.

Memorize It

Mnemonic

Bul-ham-ni: 'Bull' (unreasonable) + 'Ham-ni' (sounds like 'ham' on the knee).

Visual Association

A person trying to wear a ham on their knee—totally irrational!

Word Web

Logic Reason Fairness Argument Debate

Challenge

Identify one thing in your day that is 불합리적이다 and explain why.

Word Origin

Sino-Korean

Original meaning: Not (不) + Reason/Principle (合理) + Quality (-적이다)

Cultural Context

Can sound quite critical or confrontational.

Equates to 'irrational' or 'unreasonable' in English contexts.

Often used in Korean political debates and news editorials.

Practice in Real Life

Real-World Contexts

At work

  • 불합리한 관행
  • 불합리한 지시
  • 불합리한 업무

In debates

  • 불합리성을 지적하다
  • 논리적으로 불합리하다
  • 불합리한 근거

Social issues

  • 불합리한 구조
  • 불합리한 제도
  • 불합리한 현실

Daily life

  • 정말 불합리적이야
  • 불합리한 요구
  • 불합리한 처사

Conversation Starters

"최근에 불합리적이라고 느낀 적이 있나요?"

"불합리한 규칙을 어떻게 해결해야 할까요?"

"불합리적인 상황에서 어떻게 대처하시나요?"

"회사에서 가장 불합리한 관행은 무엇이라고 생각하세요?"

"불합리한 요구를 받았을 때 거절할 수 있나요?"

Journal Prompts

Write about a time you experienced something 불합리적이다.

Describe a situation where you had to challenge an 불합리한 system.

Why is it important to be rational (합리적) instead of 불합리적 in life?

Reflect on how you handle frustration when things are 불합리적이다.

Frequently Asked Questions

8 questions

It is direct, so it can sound confrontational if used to criticize someone directly.

Usually, it describes systems, rules, or ideas, not physical objects.

It is similar, but 'unfair' (부당하다) focuses on justice, while this focuses on logic.

Use '불합리'.

Yes, especially in debates or complaints.

Yes, it is almost always used to criticize.

Yes, it is very appropriate for formal writing.

합리적이다.

Test Yourself

fill blank A1

그 규칙은 ___.

Correct! Not quite. Correct answer: 불합리적이다

The context implies a judgment of a rule.

multiple choice A2

Which means 'irrational'?

Correct! Not quite. Correct answer: 불합리적이다

불합리적이다 is the correct term for irrational.

true false B1

불합리적이다 means 'logical'.

Correct! Not quite. Correct answer: False

It means the opposite, 'irrational'.

match pairs B1

Word

Meaning

All matched!

Matching antonyms.

sentence order B2

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

Subject + modifier + adverb + verb.

Score: /5

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