근거하다

The Korean verb 근거하다 (geun-geo-ha-da) is a cornerstone of logical communication and academic discourse. At its heart, it combines the noun '근거' (evidence, grounds, or basis) with the active verb ending '하다' (to do/be). When you use this word, you are essentially saying that a statement, a decision, or a theory does not exist in a vacuum; rather, it is anchored to a specific set of facts, data, or observations. In English, we most frequently translate this as 'to be based on,' 'to be founded upon,' or 'to be grounded in.' This word is indispensable when you want to justify your thoughts or explain the rationale behind an action. Whether you are a student writing a research paper, a lawyer presenting a case, or an employee explaining a project's direction, 근거하다 provides the structural integrity your sentences need to sound professional and persuasive.

Root Meaning

The Hanja for 근거 is 根據. '근' (根) means root or foundation, and '거' (據) means to rely on or occupy. Together, they describe the act of relying on a root foundation.

In everyday conversation, you might not hear 근거하다 as often as more casual expressions like '~때문에' (because of) or '바탕으로' (based on). However, as soon as the context shifts toward the formal—such as news reports, scientific articles, or business meetings—this verb becomes the standard. It signals to the listener that the speaker is being objective and has done their homework. For example, if a doctor explains a diagnosis, they won't just guess; they will say their conclusion is 근거하다 on the test results. This adds a layer of authority and reliability to the speech that simpler verbs cannot convey.

Understanding the nuance of 근거하다 also involves knowing what it is NOT. It is not used for personal preferences or feelings. You wouldn't say your love for ice cream is '근거하다' on its sweetness; that's too clinical. Instead, use it for things that require proof. If you are accusing someone of a mistake, your accusation must be 근거하다 on clear evidence. If a government passes a law, that law is 근거하다 on the constitution. This distinction helps learners avoid sounding overly robotic in casual settings while ensuring they sound precise in professional ones.

Common Contexts

Legal rulings, scientific research, historical analysis, and formal debates are the primary domains for this word.

Finally, it is worth noting the grammatical flexibility of this word. It often takes the particle '에' to indicate the source of the foundation. So, the pattern is usually [Source] + 에 근거하다. This '에' acts like the 'on' in 'based on.' By mastering this structure, you can construct complex sentences that explain the 'why' behind the 'what' with high-level Korean proficiency. As you move from A2 to B1 and beyond, using words like 근거하다 will significantly boost your perceived fluency and intellectual depth in Korean.

Using 근거하다 correctly requires an understanding of how it interacts with other parts of a sentence. Unlike simple action verbs like '먹다' (to eat), this verb describes a state of logical relationship. The most common grammatical pattern you will encounter is [Noun] + 에 근거하다. Here, the noun represents the evidence or the foundation. For instance, if you are talking about a story based on a true event, the 'true event' is the noun that takes the '에' particle.

In the example above, notice the form 근거하여. This is the adverbial form, which functions like 'basing on' or 'on the basis of.' It is used to connect the 'basis' to the main action of the sentence (in this case, '제작되었습니다' or 'was produced'). This is perhaps the most frequent way you will see the word used in writing. It allows for a smooth flow where the reasoning is presented before the result.

Modifying Nouns

To describe a noun, use the form '근거한'. For example: '사실에 근거한 이야기' (A story based on facts). Here, '근거한' acts as an adjective.

Another important variation is the passive-leaning usage or the descriptive usage in the present tense: 근거하고 있다. This emphasizes that the relationship is currently valid and ongoing. If a theory 'is currently based' on a certain philosophy, this progressive-like form is often preferred in modern Korean to make the sentence feel more dynamic and descriptive. For example, '우리의 주장은 통계에 근거하고 있습니다' (Our claim is based on statistics).

When you want to use 근거하다 at the end of a sentence to state a fact, you can use the standard polite endings. In a formal presentation, you might say '...에 근거합니다.' In a slightly less formal but still professional written context, '...에 근거한다' is common. Because this word is inherently formal, you will rarely see it in the '해체' (casual/panmal) style like '근거해' unless the speaker is talking to themselves or writing in a diary about a logical thought process.

Common Particles

Always remember: [Noun] + 에 (Location/Basis Particle) + 근거하다. The '에' is non-negotiable for this specific verb structure.

To summarize the usage: use 근거하여 to link a reason to an action, 근거한 to describe a noun, and 근거하다/근거하고 있다 to conclude a sentence by identifying the foundation of a subject. Mastering these three forms will cover 90% of your needs when expressing logical foundations in Korean.

If you are watching a high-stakes K-Drama involving lawyers or doctors, you will hear 근거하다 in almost every episode. In a courtroom scene, a lawyer might shout, "검찰의 주장은 확실한 증거에 근거하지 않았습니다!" (The prosecution's claim is not based on clear evidence!). Here, the word is used to challenge the validity of an argument. It carries a weight of seriousness and intellectual rigor that makes it perfect for dramatic confrontations where truth and logic are at stake.

Outside of fiction, the nightly news is the most common place to encounter this verb. Journalists use it to attribute their information to specific sources without sounding biased. Instead of saying "We think the economy is failing," they will say, "최근 경제 지표에 근거하면..." (Based on recent economic indicators...). This usage of the '면' (if/when) ending—근거하면—is a standard way to introduce a premise before providing a conclusion or a forecast. It tells the viewer that the following information is not just an opinion, but a calculated observation.

Academic Settings

In university lectures or research papers, '근거하다' is the default verb for citing previous studies or theoretical frameworks. It is the Korean equivalent of 'according to' or 'founded on the work of'.

In a corporate environment, you will hear this word during project proposals or performance reviews. If you are proposing a new marketing strategy, your boss might ask, "그 전략은 어떤 데이터에 근거한 것입니까?" (What data is that strategy based on?). In this context, being able to answer using 근거하다 shows that you are a logical and reliable professional. It moves the conversation from "I feel this will work" to "This will work because it is based on X."

Lastly, you might hear this in documentaries or educational YouTube channels. When a narrator explains why a certain historical event happened, they will often use 근거하여 to link historical documents to their narrative. It provides a sense of historical accuracy. For learners, practicing listening for this word in news clips or TED-style talks in Korean (like 'Sebasi') is an excellent way to see how it bridges the gap between raw data and meaningful conclusions.

Media Usage

Listen for it during weather reports (based on satellite data), sports analysis (based on past performance), and political debates.

By paying attention to these contexts, you'll realize that 근거하다 is more than just a verb; it's a tool for establishing credibility. Whether in a formal speech or a written report, it is the bridge that connects your claims to reality.

One of the most frequent mistakes English speakers make when using 근거하다 is using the wrong particle. In English, we say 'based on,' which leads many learners to try and find a Korean equivalent for 'on.' They might mistakenly use '~위에' (on top of). However, 근거하다 strictly requires the particle '에'. Saying '데이터 위에 근거하다' sounds very strange and literal to a native ear. Always remember: [Basis] + 에 근거하다.

Another common error is confusing 근거하다 with 기초하다 (to be based on/founded on). While they are synonyms, 기초하다 is usually used for physical foundations or very basic, fundamental principles (like the 'foundation' of a building or the 'basics' of a language). 근거하다 is specifically for logical grounds, evidence, or reasons. If you are talking about a scientific conclusion, 근거하다 is much more appropriate than 기초하다. Using the wrong one can make your sentence feel slightly 'off' in terms of register.

Confusing with '때문에'

Learners often use '근거하다' when they should just use '때문에' (because of). Use '근거하다' only when there is a formal relationship of 'evidence' or 'source.' For simple cause-and-effect, '때문에' is better.

A third mistake involves the word order and the use of the noun form. Many learners try to use '근거' as a noun without the '하다' verb, but they forget the necessary markers. For example, instead of saying '근거해서' (basing on), they might just say '근거...' and get stuck. Remember that 근거하다 is the active way to express this relationship. If you want to use the noun '근거' alone, you usually need another verb like '있다' (to have/there is) or '두다' (to place), as in '근거를 두다' (to place the basis on).

Finally, be careful with the formality. Using 근거하다 in a very casual setting (like talking to a close friend about why you chose a restaurant) can sound sarcastic or overly dramatic. It's like saying "My decision to eat pizza was founded upon the empirical evidence of my hunger." While grammatically correct, it's socially odd. Stick to '그래서' or '...니까' for those situations. Understanding the 'vibe' of the word is just as important as knowing the grammar rules.

Register Check

Is it a report? Use '근거하다'. Is it a chat with a friend? Use '때문에' or '바탕으로'.

By avoiding these pitfalls—wrong particles, confusing synonyms, and inappropriate register—you will be able to use 근거하다 like a native speaker who understands both the logic and the social nuances of the Korean language.

In Korean, there are several ways to express that one thing is based on another. While 근거하다 is the most formal and logical, knowing its alternatives will help you sound more natural and vary your vocabulary. The most common alternative is 바탕으로 하다. This expression literally means 'to make [something] the background/foundation.' It is slightly less formal than 근거하다 and is widely used in both speech and writing for a variety of topics, from creative works to business plans.

근거하다 vs. 바탕으로 하다

근거하다: Focuses on 'evidence' and 'proof'. Very clinical and logical.
바탕으로 하다: Focuses on the 'source material' or 'foundation'. More versatile and slightly softer.

Another high-level alternative is 토대로 하다. '토대' (foundation/base) is often used for the structural base of something, like a building or a system. When used metaphorically, 토대로 하다 implies that something is built upon a solid starting point. It is very common in business contexts when talking about building a new project based on previous success. "과거의 경험을 토대로..." (Based on past experience...) is a classic phrase you will hear in professional settings.

For even more formal or academic contexts, you might encounter 입각하다 (to be based on / to take a standpoint). This word is specifically used when talking about a certain principle, ideology, or standpoint. For example, '인권에 입각한 정책' (A policy based on human rights). While 근거하다 is about the 'why' (evidence), 입각하다 is about the 'where' (the philosophical position you are standing on).

If you want to be very simple, you can use 기반하다. '기반' means 'base' or 'infrastructure'. This is often used for technology or large-scale systems. For example, '클라우드에 기반한 서비스' (A cloud-based service). It feels very modern and technical. In contrast, 근거하다 would feel a bit too 'legal' or 'argumentative' for a technology description.

Comparison Table

• 근거하다: Evidence, Law, Logic (Formal)
• 바탕으로 하다: General foundation, Creative works (Neutral/Formal)
• 토대로 하다: Structural base, Experience (Professional)
• 입각하다: Ideology, Standpoint (Academic/Political)
• 기반하다: Infrastructure, Technology (Technical)

In summary, while 근거하다 is your go-to word for logical justification, the Korean language offers a rich palette of 'based on' synonyms. Choosing the right one depends on whether you are talking about a legal fact (근거), a creative inspiration (바탕), a business experience (토대), a political ideology (입각), or a technical platform (기반). Mastering these distinctions is a sign of a truly advanced Korean learner.