At the A1 level, '항구성' (hang-gu-seong) is a very difficult word that you usually don't need to know yet. However, you can think of it simply as 'lasting for a very, very long time.' Imagine a mountain or the sun; they don't change and they stay there every day. In basic Korean, we usually use words like '오래' (long time) or '항상' (always). '항구성' is like a super-formal version of 'always staying the same.' You might see the first part '항' in words like '항상' (always). For now, just remember that it's a word used for big, important things that stay the same forever, like peace or the stars. You don't need to use it in your own speaking yet, but if you see it in a news headline about 'peace,' you'll know it means they want the peace to last forever.
At the A2 level, you are starting to learn more Hanja-based words. '항구성' comes from Hanja: '항' (constant), '구' (long time), and '성' (nature). So, it literally means 'the nature of being constant for a long time.' You might encounter this word in simple news clips or reading passages about the environment or history. For example, when talking about a historical monument, someone might say it has '항구성.' It's important to differentiate this from '내구성' (durability), which you might use to describe your sturdy backpack. '항구성' is for bigger things. A good way to remember it is through the phrase '항구적인 평화' (permanent peace), which is a common phrase in Korean history books. You don't need to use it in daily life, but recognizing it will help you understand more formal texts.
At the B1 level, you should begin to recognize '항구성' as a formal noun used in professional or academic contexts. This word describes 'permanence' or 'stability.' You will notice that it is often used in discussions about laws, social systems, or environmental protection. For instance, a 'permanent solution' to a problem is often called '항구적인 해결책.' At this level, you should understand the difference between '항구성' and '지속성' (sustainability). While '지속성' is about keeping a process going, '항구성' is about the state of something remaining unchanged. You might start using the adjectival form '항구적' in your writing to sound more formal. For example, instead of saying '영원한 평화' (eternal peace), which sounds a bit poetic, you can say '항구적인 평화' to sound more like a news reporter or a student.
At the B2 level, '항구성' is a word you should be able to use correctly in formal writing and understand in complex listening tasks. It refers to the quality of permanence and stability, especially in the context of systems, treaties, and abstract values. You should be familiar with common collocations like '항구성을 띠다' (to take on a permanent character) or '항구성을 확보하다' (to secure permanence). At this level, you are expected to handle the nuance between '항구성' (stability/permanence) and '내구성' (physical durability). You might use this word when writing an essay about social change, arguing that certain values need '항구성' to maintain social order. You should also recognize it in legal or political news, where it is a key term for lasting agreements or structural changes in government.
At the C1 level, you should have a deep grasp of '항구성' and its philosophical implications. It is no longer just a vocabulary word but a conceptual tool. You can use it to discuss the ontological status of objects or the structural integrity of complex systems. In academic discourse, you might use '항구성' to critique the 'transience' (일시성) of modern consumer culture. You should be able to navigate its use in various fields: in physics (permanent magnets), in law (perpetual rights), and in philosophy (the permanence of the soul or truth). Your usage should reflect an understanding of its register—it is a 'high' word that brings weight and authority to your arguments. You can also contrast it with '가변성' (mutability) to discuss how things evolve or remain static over centuries.
At the C2 level, '항구성' is a word you master in all its subtle shades. You understand how it functions within the broader landscape of Korean Sino-terminology, comparing it effortlessly with '영속성' (perpetuity), '불변성' (immutability), and '만고불변' (unchanging through all ages). You can use it in high-level literature, legal drafting, or philosophical treatises. You might explore the paradox of '항구성' in a world of constant change, or use it to describe the 'perpetual' nature of national identity. At this level, you are sensitive to the historical weight the word carries, particularly in the context of the Korean Peninsula's search for '항구적 평화.' Your ability to use this word correctly in a speech or a complex academic paper demonstrates a near-native command of the most formal and intellectual registers of the Korean language.

항구성 in 30 Seconds

  • 항구성 means 'permanence' or 'perpetuity,' describing things that last forever without changing.
  • It is a formal word used in politics (lasting peace), engineering (durability), and philosophy.
  • The Hanja roots are 恒 (always) and 久 (long time), signifying eternal constancy.
  • It is often used as '항구적인' (permanent) to modify nouns like solutions or treaties.

The Korean word 항구성 (恒久性 - Hangguseong) is a sophisticated noun that translates to 'permanence,' 'perpetuity,' or 'durability.' At its core, it describes the quality of something that remains unchanged over a vast span of time, or ideally, forever. To understand this word, we must look at its Hanja roots: 恒 (항) meaning 'always' or 'constant' and 久 (구) meaning 'long time,' followed by 性 (성) meaning 'nature' or 'quality.' Together, they create a concept of a nature that is eternally constant. This isn't just about something lasting a few years; it is about an inherent stability that resists the wear and tear of time and external pressure. While you might use 'durability' for a pair of boots, you use '항구성' for things with a more profound or structural significance, such as peace, laws, or the fundamental nature of the universe.

Formal Contexts
In legal and political discourse, '항구성' is frequently paired with '평화' (peace). A 'lasting peace' is referred to as '항구적인 평화.' This implies a peace that is not merely a temporary ceasefire but a permanent state of harmony.
Technical Application
In civil engineering or architecture, '항구성' refers to the ability of a structure to maintain its integrity over its intended lifespan without significant degradation. It is a key metric in assessing the quality of materials like reinforced concrete.

인류는 전쟁 없는 세상의 항구성을 확보하기 위해 끊임없이 노력해 왔다. (Humanity has constantly strived to secure the permanence of a world without war.)

Beyond physical objects, the term is often applied to abstract values. For instance, philosophers might debate the '항구성' of truth or human nature. If something has '항구성,' it means that no matter how much the world changes around it, that specific entity or quality remains steadfast. This word is rarely used in casual conversation between friends about everyday items; you wouldn't typically talk about the '항구성' of a plastic cup. Instead, it appears in academic papers, news editorials, and high-level business strategy meetings where long-term vision is the focus.

In the digital age, '항구성' has taken on a new meaning regarding data. We talk about the '항구성' of digital records—the idea that information stored today should be accessible and uncorrupted hundreds of years from now. This highlights the word's transition from physical stone monuments to invisible strings of code. Whether it is a mountain, a diplomatic treaty, or a digital archive, '항구성' is the gold standard for anything we hope will outlast us. Understanding this word allows you to engage with Korean intellectual and professional content at a much deeper level, as it captures a uniquely stoic and enduring perspective on existence.

Using 항구성 correctly requires an understanding of its grammatical role as a noun and its common adjectival form, 항구적 (hanggu-jeok). Because it is a concept of 'permanence,' it often functions as the subject of a sentence or the object of verbs like '확보하다' (to secure), '유지하다' (to maintain), or '의심하다' (to doubt). It is almost exclusively used in formal, written, or academic Korean. When you want to describe a state that is permanent, you attach the suffix '-적' to turn it into an attributive adjective, which then modifies another noun.

Subjective Use
'이 건물의 항구성은 검증되었습니다.' (The permanence/durability of this building has been verified.) Here, the word acts as a property being discussed.
Adjectival Use (~적)
'우리는 항구적인 해결책을 찾아야 합니다.' (We must find a permanent solution.) This is the most common way you will encounter the root word in daily professional life.

그 정책은 단기적인 효과는 있었으나 항구성이 부족했다. (The policy had short-term effects but lacked permanence.)

One key pattern is the structure [Noun] + 의 항구성. For example, '제도의 항구성' (the permanence of a system) or '평화의 항구성' (the permanence of peace). This allows you to discuss the longevity of any abstract concept. Another frequent pattern is 항구성을 띠다, which means 'to take on the character of permanence.' If a change in the law '항구성을 띠다,' it means the change is intended to be a lasting fixture of the legal system, not a temporary measure.

이 조치는 항구성을 띠고 있어 앞으로의 사회 구조를 바꿀 것입니다. (This measure takes on a permanent character and will change the future social structure.)

In academic writing, '항구성' is often contrasted with '일시성' (temporariness) or '가변성' (variability). For instance, in a sociology paper, one might analyze the '항구성' of social classes versus the '가변성' of individual wealth. Using these contrasts makes your Korean sound highly educated and precise. When writing, ensure that the context justifies such a heavy word; using '항구성' to describe a long-lasting battery might sound slightly overly dramatic or technical unless you are writing a formal product specification.

While you won't hear 항구성 in a K-drama about high school romance or at a local market, it is a staple of the Korean 'serious' media landscape. If you tune into KBS News or read the Chosun Ilbo, you will encounter this word in discussions about international relations, specifically regarding the Korean Peninsula. Politicians often speak of '한반도의 항구적인 평화 정착' (the establishment of permanent peace on the Korean Peninsula). This is perhaps the most iconic phrase containing the root of this word, appearing in almost every major diplomatic statement regarding North-South relations.

News & Politics
Used when discussing treaties, constitutional amendments, or long-term national goals. It emphasizes that the subject is not a 'stop-gap' measure.
Science & Engineering
In documentaries about the universe or geology, '항구성' is used to describe the enduring nature of celestial bodies or the stability of the Earth's crust over eons.

'이번 조약은 양국 간의 항구적인 협력을 보장할 것입니다.' (This treaty will guarantee permanent cooperation between the two nations.)

You will also hear this word in religious or philosophical settings. In Buddhist lectures, '항구성' might be discussed in the context of '무상' (impermanence), where the teacher explains that nothing in the physical world possesses true '항구성.' In this context, the word serves as a foil to the reality of change. Similarly, in legal dramas, lawyers might argue about the '항구성' of a certain right or the '항구적' nature of a court's injunction. It provides a sense of gravity and finality to the legal arguments being presented.

'진리에 항구성이 없다면 그것을 어찌 진리라 부르겠습니까?' (If truth has no permanence, how can we call it truth?)

Finally, in the corporate world, specifically in sustainability reports (ESG management), '항구성' is used to describe the long-term viability of a business model or the permanent impact of environmental initiatives. It suggests a commitment that goes beyond quarterly profits, aiming for a legacy that lasts for generations. When a CEO mentions '항구적인 가치 창출' (permanent value creation), they are signaling to investors that the company is built to last. For a learner, recognizing this word is a sign that you have moved beyond conversational Korean and are entering the realm of professional and intellectual discourse.

One of the most common mistakes learners make with 항구성 is confusing it with its homonym 항구 (Harbor/Port). While '항구' (harbor) is a very common A1-level word, '항구성' is a B2-level abstract concept. Beginners often see '항구' and think of ships, even when the context is about 'peace' or 'stability.' Always look for that third syllable '-성' (suffix for -ness or -ity) or the context of the sentence to differentiate the two. Another mistake is using '항구성' in informal settings. Saying '이 김치의 항구성이 대단해요' (The permanence of this kimchi is great) sounds bizarre; instead, use '오래가다' (to last long) or '보존성' (preservability).

Confusing with '지속성' (Sustainability)
'지속성' refers to the ability to continue a process. '항구성' refers to the state of being unchanging. You sustain a diet (지속성), but a mountain has permanence (항구성).
Confusing with '영구성' (Permanence)
'영구성' (Everlastingness) is very similar, but '항구성' often carries a nuance of 'stability' and 'constancy' in the face of change, whereas '영구성' is often used for things that simply don't end (like 'permanent teeth' - 영구치).

Wrong: 이 펜은 항구성이 좋아요. (This pen has good permanence.)
Right: 이 펜은 내구성이 좋아요. (This pen has good durability.)

Using '항구성' when you mean '내구성' (durability/sturdiness) is a frequent error. '내구성' is for physical objects like tools, electronics, or furniture—things that resist physical wear. '항구성' is for systems, states, or abstract concepts. If you say a chair has '항구성,' people will understand you mean it's sturdy, but it sounds like you're describing the chair as a philosophical monument rather than a piece of furniture.

Wrong: 우정의 내구성 (Durability of friendship)
Right: 우정의 항구성 (Permanence/Constancy of friendship)

Lastly, be careful with the word '영구' (Everlasting). While '항구' and '영구' are synonyms, '영구' is more common in everyday compound words (like '영구 자석' for permanent magnet, though '항구 자석' is technically correct but rarer). '항구' sounds more literary and is preferred in diplomatic and academic contexts. Mixing these up won't necessarily make you misunderstood, but it might make your speech sound slightly 'off' in terms of register.

Korean has several words that touch upon the idea of lasting a long time. Choosing the right one depends on whether you are emphasizing 'not changing,' 'not ending,' or 'not breaking.' 항구성 is the specific choice when you want to highlight the unchanging nature and stability of a state or system. Let's compare it with its closest neighbors.

영구성 (Yeong-gu-seong) vs. 항구성
'영구성' emphasizes 'forever-ness.' It is often used for things that are meant to last for an infinite duration (e.g., 영구 불변 - eternally unchanging). '항구성' is more about the 'constancy' and 'stability' over a long period. They are often interchangeable, but '항구성' is more common in political 'lasting peace' contexts.
내구성 (Nae-gu-seong) vs. 항구성
'내구성' is 'durability.' This is the term for physical materials. A car has '내구성.' A peace treaty has '항구성.' You measure '내구성' with a hammer; you measure '항구성' with history.
지속성 (Ji-sok-seong) vs. 항구성
'지속성' is 'continuity' or 'sustainability.' It refers to a process that keeps going. A '지속적인 발전' is sustainable development. It doesn't mean the state is unchanging, just that the activity doesn't stop.

Comparison:
1. 진리의 항구성 (The constancy of truth)
2. 건물의 내구성 (The durability of a building)
3. 성장의 지속성 (The continuity of growth)

Another alternative is 불변성 (Bul-byeon-seong), which literally means 'unchangeability.' This is used in science and philosophy to describe things that absolutely cannot change, like the laws of physics or mathematical constants. While '항구성' implies it doesn't change over time, '불변성' implies it cannot change. Then there is 영속성 (Yeong-sok-seong), which is very high-level academic Korean for 'perpetuity.' It is often used in law to describe the 'perpetual existence' of a corporation or a sovereign state.

When choosing between these, consider the 'vibe' you want to project. If you want to sound like a diplomat or a scholar, '항구성' is your best friend. If you want to talk about how well your phone is made, stick to '내구성.' If you're talking about a love that will never end in a poem, '영원성' (eternity) or '불변성' (unchangeability) might be more romantic. Understanding these nuances is what separates a B2 learner from a native speaker.

How Formal Is It?

Fun Fact

The '항' (恒) character is the same one used in '항상' (always), while '구' (久) is the same as in '오래구' (long time). It’s a very literal combination.

Pronunciation Guide

UK /haŋ.gu.sʌŋ/
US /haŋ.gu.sʌŋ/
Equally stressed syllables, though the first 'hang' is often slightly elongated.
Rhymes With
영구성 (Yeong-gu-seong) 내구성 (Nae-gu-seong) 지속성 (Ji-sok-seong) 안정성 (An-jeong-seong) 가능성 (Ga-neung-seong) 다양성 (Da-yang-seong) 창의성 (Chang-ui-seong) 일관성 (Il-gwan-seong)
Common Errors
  • Pronouncing '구' (gu) as 'goo' like in 'goose' (too long).
  • Confusing '성' (seong) with '송' (song).
  • Dropping the 'ng' sound at the end of the first syllable.
  • Making the 'u' sound in 'gu' too rounded.
  • Misplacing the stress on the last syllable.

Difficulty Rating

Reading 4/5

Common in news and academic texts, but rarely in casual reading.

Writing 5/5

Requires understanding of formal register and Hanja-based collocations.

Speaking 4/5

Only used in high-level presentations or debates.

Listening 4/5

Easy to confuse with 'harbor' (항구) without context.

What to Learn Next

Prerequisites

항상 오래 성질 영원 안정

Learn Next

영속성 불변성 지속가능성 가변성 찰나

Advanced

형이상학 온전성 불멸 무상함

Grammar to Know

~적 (Suffix to make a noun an attributive adjective)

항구 + 적 = 항구적 (Permanent)

~성 (Suffix meaning -ness or -ity)

항구 + 성 = 항구성 (Permanence)

~으로 인해 (Due to/Because of)

항구성으로 인해 가치가 높다.

~을/를 띠다 (To take on a characteristic)

항구성을 띠다.

~ㄴ/는 한 (As long as / Unless)

항구적인 대책이 마련되지 않는 한...

Examples by Level

1

이 산은 항구성이 있어요.

This mountain has permanence (stays the same).

Noun + 이/가 + 있어요 (Basic existence)

2

평화의 항구성을 원해요.

I want the permanence of peace.

Object marker ~을/를 with '원해요'

3

항구적인 것은 아름다워요.

Permanent things are beautiful.

Adjective form '항구적인' modifying '것'

4

그는 항구성을 믿어요.

He believes in permanence.

Subject '그는' + Object + Verb

5

항구성은 중요해요.

Permanence is important.

Topic marker ~은/는

6

바다는 항구성이 느껴져요.

I feel permanence from the sea.

Passive-like expression '느껴져요'

7

항구적인 사랑이 있어요?

Is there permanent love?

Question form with '있어요?'

8

이 돌은 항구성이 강해요.

This stone has strong permanence.

Adjective '강해요' (strong) used with a noun

1

항구적인 평화를 위해 기도해요.

I pray for permanent peace.

~을/를 위해 (For the sake of)

2

이 제도는 항구성이 부족합니다.

This system lacks permanence.

Formal ending ~습니다

3

항구적인 해결책이 필요해요.

A permanent solution is needed.

Noun + 이/가 + 필요해요

4

자연의 항구성을 보호합시다.

Let's protect the permanence of nature.

~읍시다 (Let's...)

5

그 건물은 항구성이 뛰어납니다.

That building has excellent permanence/durability.

뛰어나다 (To be excellent)

6

항구적인 우정을 약속했어요.

They promised a permanent friendship.

Past tense '약속했어요'

7

진리는 항구성을 가집니다.

Truth possesses permanence.

가집니다 (Possesses/Has)

8

항구적인 변화를 기대해요.

I expect a permanent change.

기대해요 (Expect/Look forward to)

1

정부는 항구적인 대책을 마련했습니다.

The government prepared a permanent measure.

마련하다 (To prepare/arrange)

2

이 계약은 항구성을 띠고 있습니다.

This contract has a permanent character.

~을/를 띠다 (To take on/possess a trait)

3

항구적인 발전을 위해 노력해야 합니다.

We must strive for permanent development.

~해야 합니다 (Must do)

4

그 이론은 항구성이 증명되었습니다.

The permanence of that theory has been proven.

증명되다 (To be proven)

5

우리는 항구적인 가치를 추구합니다.

We pursue permanent values.

추구하다 (To pursue)

6

항구적인 우호 관계를 유지합시다.

Let's maintain a permanent friendly relationship.

유지하다 (To maintain)

7

이 물질은 항구성이 매우 높습니다.

This substance has very high permanence/stability.

Adverb '매우' (very)

8

항구적인 평화 정착이 시급합니다.

Establishing permanent peace is urgent.

시급하다 (To be urgent)

1

법률의 항구성은 사회적 안정을 가져옵니다.

The permanence of laws brings social stability.

가져오다 (To bring/result in)

2

항구적인 조치를 취하지 않으면 문제가 반복될 것입니다.

If permanent measures aren't taken, the problem will repeat.

~지 않으면 (If not...)

3

예술 작품은 그 항구성으로 인해 가치가 높습니다.

Artworks are highly valued due to their permanence.

~으로 인해 (Due to/Because of)

4

이 정책이 항구성을 가질 수 있을지 의문입니다.

It is questionable whether this policy can have permanence.

~을 수 있을지 의문이다 (Questionable whether...)

5

인간 정신의 항구성에 대해 논의해 봅시다.

Let's discuss the permanence of the human spirit.

~에 대해 논의하다 (Discuss about)

6

그는 항구적인 업적을 남기고 떠났습니다.

He left behind a permanent achievement and passed away.

업적을 남기다 (To leave an achievement)

7

항구적인 평화 체제 구축이 논의되고 있습니다.

The establishment of a permanent peace system is being discussed.

Passive '논의되고 있다' (Is being discussed)

8

디지털 데이터의 항구성을 확보하는 것이 과제입니다.

Securing the permanence of digital data is a challenge.

~하는 것이 과제이다 (Doing ... is a task/challenge)

1

민주주의의 항구성은 시민의 참여에 달려 있습니다.

The permanence of democracy depends on citizen participation.

~에 달려 있다 (Depends on)

2

우주의 항구성과 인간의 찰나성을 대비시켜 보십시오.

Contrast the permanence of the universe with the transience of humans.

대비시키다 (To contrast)

3

항구적인 경제 성장을 위한 구조적 개혁이 필요합니다.

Structural reforms for permanent economic growth are necessary.

~을 위한 (For/Aimed at)

4

이 철학적 명제는 항구성을 지니고 있습니다.

This philosophical proposition possesses permanence.

지니다 (To possess/carry)

5

항구적인 권력은 존재하지 않는다는 것이 역사의 교훈입니다.

The lesson of history is that permanent power does not exist.

~는다는 것 (The fact that...)

6

그 조약의 항구성에 대한 회의적인 시각이 지배적입니다.

Skeptical views on the permanence of that treaty are dominant.

지배적이다 (To be dominant/prevalent)

7

문화적 전통의 항구성은 민족의 정체성을 형성합니다.

The permanence of cultural traditions forms a nation's identity.

형성하다 (To form/shape)

8

항구적인 해결을 위해서는 근본적인 원인을 제거해야 합니다.

For a permanent solution, the root cause must be removed.

제거하다 (To remove/eliminate)

1

존재의 항구성을 탐구하는 것은 형이상학의 핵심 과제입니다.

Exploring the permanence of existence is a core task of metaphysics.

탐구하다 (To explore/investigate)

2

국가 간의 항구적 우호는 상호 신뢰의 토대 위에 세워집니다.

Permanent friendship between nations is built on the foundation of mutual trust.

토대 위에 세워지다 (To be built on a foundation)

3

그 작가는 인간 고통의 항구성을 문학적으로 형상화했습니다.

The author artistically embodied the permanence of human suffering.

형상화하다 (To embody/give shape to)

4

항구적인 평화라는 이상은 현실 정치에서 종종 좌절됩니다.

The ideal of permanent peace is often frustrated in realpolitik.

좌절되다 (To be frustrated/thwarted)

5

진리의 항구성을 부정하는 포스트모더니즘적 시각을 분석하십시오.

Analyze the postmodern perspective that denies the permanence of truth.

부정하다 (To deny)

6

이 유적의 항구성을 보존하기 위해 첨단 기술이 동원되었습니다.

Advanced technology was mobilized to preserve the permanence of these ruins.

동원되다 (To be mobilized)

7

항구적인 제도적 장치가 마련되지 않는 한 변화는 일시적일 뿐입니다.

Unless permanent institutional mechanisms are prepared, change is only temporary.

~지 않는 한 (Unless...)

8

인간사의 무상함 속에서도 우리는 항구성을 갈구합니다.

Even amidst the impermanence of human affairs, we crave permanence.

갈구하다 (To crave/long for)

Synonyms

Antonyms

일시성 가변성

Common Collocations

항구적인 평화
항구성을 띠다
항구성을 확보하다
항구적인 대책
항구적인 해결책
항구적인 우호
항구적인 시설
항구적인 발전
항구적인 가치
항구적인 변화

Common Phrases

항구적인 조치

— A measure intended to be permanent, not just a stop-gap.

임시방편이 아닌 항구적인 조치가 필요하다.

항구적인 기반

— A solid, unchanging foundation for a system.

항구적인 기반을 마련하는 것이 중요하다.

항구적인 체제

— A system or regime that is intended to last indefinitely.

항구적인 평화 체제 구축.

항구적인 평화 정착

— The establishment of a lasting and stable peace.

한반도의 항구적인 평화 정착을 위해 노력한다.

항구적인 기록

— Records that are kept for eternity.

디지털 시대의 항구적인 기록 보존.

항구적인 영향

— An impact that stays forever.

역사에 항구적인 영향을 미치다.

항구적인 우정

— Friendship that is constant and never-ending.

우리의 항구적인 우정을 위하여!

항구적인 발전상

— A state of continuous and permanent progress.

회사의 항구적인 발전상을 보여주다.

항구적인 권리

— Rights that are perpetual and cannot be taken away.

국민의 항구적인 권리를 보장하다.

항구적인 해결

— A final and permanent resolution to a problem.

분쟁의 항구적인 해결을 도모하다.

Often Confused With

항구성 vs 항구 (Harbor)

Same first two syllables, but totally different meaning. Context usually clears it up.

항구성 vs 내구성 (Durability)

Used for physical objects/tools; 항구성 is for systems/abstracts.

항구성 vs 지속성 (Sustainability)

Focuses on the continuation of an action; 항구성 focuses on the unchanging state.

Idioms & Expressions

"항구불변 (恒久不變)"

— Always constant and never-changing.

진리는 항구불변의 법칙이다.

Literary
"만고불변 (萬古不變)"

— Unchanging throughout all ages (ten thousand ages).

부모님의 사랑은 만고불변이다.

Literary
"영구불멸 (永久不滅)"

— Everlasting and never-dying.

그의 이름은 영구불멸할 것이다.

Literary
"천추만대 (千秋萬代)"

— For a thousand autumns and ten thousand generations (forever).

나라의 평화가 천추만대 이어지길.

Archaic
"금석지교 (金石之交)"

— A friendship as solid as gold and stone (permanent).

우리는 금석지교를 맺었다.

Literary
"영원무궁 (永遠無窮)"

— Eternal and without end.

영원무궁한 영광을 누리소서.

Formal
"해고석란 (海枯石爛)"

— Until the seas dry up and the rocks rot (meaning forever).

해고석란이 되어도 당신을 사랑해요.

Poetic
"일편단심 (一片丹心)"

— A single, unchanging heart (loyalty).

임 향한 일편단심.

Traditional
"철옹성 (鐵甕城)"

— An iron castle (metaphor for something permanent and impregnable).

그의 권력은 철옹성 같았다.

General
"백년하청 (百年河淸)"

— Waiting a hundred years for the river to clear (meaning something that will never happen/change).

그가 변하기를 기다리는 것은 백년하청이다.

Literary

Easily Confused

항구성 vs 영구성

Almost identical meaning.

영구성 is slightly more general; 항구성 is more common in political/systemic contexts.

영구적인 손상 vs 항구적인 평화.

항구성 vs 영속성

Both mean perpetuity.

영속성 is specifically used in legal/corporate contexts regarding existence.

기업의 영속성.

항구성 vs 불변성

Both imply no change.

불변성 means 'cannot change' (physics); 항구성 means 'designed not to change'.

에너지 보존의 불변성.

항구성 vs 안정성

Both relate to staying the same.

안정성 is about not shaking or failing; 항구성 is about staying forever.

금융 시스템의 안정성.

항구성 vs 보존성

Both relate to lasting.

보존성 is about how well something is kept from rotting/decaying.

식품의 보존성.

Sentence Patterns

B2

N의 항구성을 확보하다

평화의 항구성을 확보하다.

B2

항구적인 N을 마련하다

항구적인 대책을 마련하다.

C1

항구성을 띠고 있다

이 조치는 항구성을 띠고 있다.

C1

항구성의 부재

제도의 항구성의 부재가 원인이다.

C2

항구성을 담보하다

미래의 항구성을 담보하다.

C2

항구성에 대한 회의

진리의 항구성에 대한 회의.

B1

항구적으로 유지되다

평화가 항구적으로 유지되다.

B2

항구성이 뛰어나다

건물의 항구성이 뛰어나다.

Word Family

Nouns

항구 Permanence/Port (Homonym)
항구성 The quality of permanence

Verbs

항구화하다 To make something permanent
항구하다 To be permanent/lasting

Adjectives

항구적 Permanent/Perpetual

Related

영구 (Everlasting)
영원 (Eternity)
지속 (Continuance)
불변 (Unchangeability)
안정 (Stability)

How to Use It

frequency

Common in news, law, and academia; rare in daily speech.

Common Mistakes
  • Using '항구성' for a sturdy phone case. 내구성

    Physical durability of a consumer product is '내구성'.

  • Confusing '항구' (harbor) with '항구' (permanence). Contextual awareness

    If ships are involved, it's a harbor. If peace/laws are involved, it's permanence.

  • Saying '항구한 평화' instead of '항구적인 평화'. 항구적인 평화

    While '항구하다' is a verb, the '~적인' form is the standard way to modify nouns.

  • Using '항구성' for a sustainable business process. 지속성

    '지속성' is better for processes that continue; '항구성' is for states that don't change.

  • Misspelling as '한구성'. 항구성

    The first syllable is '항' (Hang), not '한' (Han).

Tips

Learn the Root

The '항' (恒) root is very useful. It appears in '항상' (always) and '항수' (constant in math).

Adjectival Form

You will use '항구적인' far more often than '항구성' itself. Master the adjectival form first.

Academic Tone

Using '항구성' immediately elevates the tone of your writing to a professional or academic level.

News Watch

Watch Korean news segments on diplomacy; you will hear this word within the first few minutes almost every time.

Formal Debates

In a debate, use '항구성' to argue why a certain policy is better in the long run than a temporary fix.

Hanja Logic

Remember: Always (항) + Long Time (구) + Nature (성). It makes the meaning very easy to recall.

Avoid Slang

Never use '항구성' in a text message to a friend about a movie or food; it sounds very awkward.

Contrast

When writing, contrast '항구성' with '일시성' (transience) to show a deep understanding of the topic.

TOPIK Prep

This word is a 'high-yield' word for the TOPIK II essay section regarding social issues.

Memorize It

Mnemonic

Imagine a **Hang** glider that stays in the air for a **Gu** (long time) because of its permanent **Seong** (nature).

Visual Association

Picture a massive stone monument in the middle of a desert that never changes despite sandstorms. That is '항구성'.

Word Web

Peace (평화) Stability (안정) Forever (영원) System (체제) Law (법) Truth (진리) Eternity (영구) Unchanging (불변)

Challenge

Try to use '항구적인' instead of '영원한' next time you talk about a long-term plan or a permanent solution in a formal setting.

Word Origin

Sino-Korean (Hanja-based). 恒 (항) + 久 (구) + 性 (성).

Original meaning: The nature of being constant for a long time.

Sino-Korean

Cultural Context

Be careful when using this in political discussions, as 'permanent peace' can be a sensitive topic depending on the political viewpoint regarding North Korea.

In English, 'permanence' sounds quite formal, but we often use 'lasting' or 'forever.' In Korean, '항구성' is specifically used for structural or systemic permanence.

Panmunjom Declaration (frequent use of '항구적 평화') Buddhist scriptures (discussing the lack of '항구성' in the physical world) Constitutional Law of Korea (regarding the permanence of certain rights)

Practice in Real Life

Real-World Contexts

Political Summits

  • 항구적인 평화 체제
  • 항구적인 우호 관계
  • 항구적인 조약
  • 항구적인 협력

Engineering/Construction

  • 항구적인 시설물
  • 항구적인 구조
  • 재료의 항구성
  • 항구적인 보수

Data Science

  • 데이터의 항구성
  • 기록의 항구성
  • 항구적인 저장
  • 항구적인 접근성

Philosophy/Religion

  • 진리의 항구성
  • 존재의 항구성
  • 무상과 항구성
  • 항구적인 가치

Law/Policy

  • 항구적인 권리
  • 제도의 항구성
  • 항구적인 법적 효력
  • 항구적인 대책

Conversation Starters

"한반도의 항구적인 평화에 대해 어떻게 생각하세요?"

"디지털 시대에 데이터의 항구성을 어떻게 보장할 수 있을까요?"

"인간 관계에서 항구성이 가장 중요한 요소일까요?"

"변하지 않는 진리, 즉 항구적인 가치가 존재한다고 믿으시나요?"

"어떤 정책이 가장 항구적인 효과를 낼 수 있을까요?"

Journal Prompts

내 삶에서 가장 항구성을 띠는 가치는 무엇인가?

항구적인 평화가 실현되기 위해 우리 사회가 해야 할 일에 대해 쓰시오.

변화하는 세상 속에서 항구성을 유지하는 것의 어려움에 대하여.

내가 만든 것 중 가장 항구성이 있기를 바라는 것은 무엇인가?

항구성과 일시성 중 어떤 것이 인생에서 더 큰 의미를 갖는가?

Frequently Asked Questions

10 questions

It is technically possible but sounds too formal. Use '지속 시간' or '내구성' instead.

항구 usually means harbor. 항구성 is the noun meaning permanence. However, 항구 can also be a root meaning permanence in compound words like 항구 평화.

Yes, but it's much more formal. It's like 'perpetual' or 'lasting' in English.

Use it as an adverb to describe how an action is performed, e.g., '항구적으로 해결하다' (to solve permanently).

Yes, it is a common term in diplomatic language used by both North and South Korea.

Usually no, as human life is '무상' (impermanent). You might use it in philosophy to talk about the soul.

일시성 (temporariness) or 가변성 (mutability).

No, that doesn't exist as a concept in Korean.

Yes, it often appears in TOPIK II (Intermediate-Advanced) reading and listening sections.

It is written as 恒久性.

Test Yourself 180 questions

writing

Write a sentence using '항구적인 평화'.

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writing

Translate: 'This system lacks permanence.'

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writing

Describe why laws need '항구성' in 10 words or more.

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writing

Write a sentence using '항구적인 해결책'.

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writing

Translate: 'The building has excellent durability (permanence).'

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writing

Compare '항구성' and '일시성' in one sentence.

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writing

Write a sentence with '항구적으로'.

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writing

Use the phrase '항구성을 띠다' in a sentence.

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writing

Translate: 'Securing the permanence of data is a major challenge.'

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writing

Create a sentence using '항구적인 가치'.

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writing

Translate: 'Let's maintain permanent friendship.'

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writing

Write a short paragraph (2 sentences) about the permanence of truth.

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writing

Translate: 'The policy had no permanence.'

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writing

Use '항구적인 발전을 위해' in a sentence.

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writing

Translate: 'I believe in permanence.'

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writing

Write a sentence with '항구적인 조치'.

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writing

Translate: 'Humanity craves permanence amidst change.'

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writing

Translate: 'A permanent magnet.'

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writing

Translate: 'The permanence of the universe.'

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writing

Write a sentence about '항구적인 우호'.

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speaking

Describe the meaning of '항구성' in your own words (in Korean).

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speaking

Say 'We need a permanent solution' in formal Korean.

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speaking

Discuss why peace should be '항구적' (in Korean).

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speaking

Pronounce '항구성' clearly.

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speaking

Say 'The building has excellent durability' using '항구성'.

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speaking

Talk about the '항구성' of digital data (in Korean).

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speaking

Say 'Permanent friendship' in Korean.

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speaking

Use '항구성을 띠다' in a sentence about a new rule.

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speaking

Explain the difference between '항구성' and '내구성'.

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speaking

Say 'I hope for permanent peace' in Korean.

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speaking

Say 'Always and long time' in Hanja roots of '항구성'.

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speaking

Debate: Is there anything truly '항구적' in the world?

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speaking

Say 'The policy lacks permanence' in Korean.

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speaking

Say 'Securing permanence is a challenge'.

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speaking

Say 'Permanent magnet' in Korean.

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speaking

Say 'Permanent measure' in Korean.

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speaking

Use the word '항구성' in a sentence about history.

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speaking

Say 'Permanent development'.

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speaking

Say 'Permanent value'.

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speaking

Say 'It takes on a permanent character'.

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listening

Listen to the word: [항구성]. What does it mean?

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listening

Listen to the sentence: [항구적인 평화를 원합니다]. What is wanted?

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listening

Listen to the phrase: [항구성을 띠다]. What is the meaning?

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listening

Listen to the word: [항구 자석]. What object is this?

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listening

Listen to the sentence: [제도의 항구성이 중요합니다]. What is important?

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listening

Listen to the sentence: [진리의 항구성을 믿습니까?]. What is being asked?

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listening

Listen to the phrase: [항구적인 해결책]. What kind of solution is it?

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listening

Listen to the sentence: [항구성이 부족합니다]. Does it last long?

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listening

Listen to the phrase: [항구성을 확보하다]. What are they doing?

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listening

Listen to the word: [항구적]. What is the adjective form?

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Correct! Not quite. Correct answer:

/ 180 correct

Perfect score!

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