Quick Answer
In Vietnamese, biết generally means 'to know' a fact, a skill, or to be familiar with someone or something. On the other hand, hiểu means 'to understand' a concept, a meaning, or to comprehend a situation deeply.
Think of biết as superficial or factual knowledge, while hiểu implies a deeper grasp and comprehension.
Comparison Table
| Aspect | biết | hiểu |
|---|---|---|
| Core Meaning | To know (a fact, a person, a skill) | To understand (a concept, a meaning, a situation) |
| Type of Knowledge | Factual, superficial, acquaintance, ability, awareness | Deep comprehension, grasping meaning, empathy, insight |
| Focus | Having information, familiarity, capability | Processing information, making sense, interpreting |
| Example 1 | Bạn biết anh ấy không? (Do you know him?) | Bạn có hiểu anh ấy không? (Do you understand him?) |
| Example 2 | Tôi biết nói tiếng Việt. (I know how to speak Vietnamese.) | Tôi hiểu tiếng Việt. (I understand Vietnamese.) |
| Example 3 | Cô ấy biết địa chỉ rồi. (She knows the address already.) | Tôi không hiểu bài học này. (I don't understand this lesson.) |
Detailed Explanation
Both biết and hiểu translate to some form of 'knowing' or 'understanding' in English, but they are used in distinct contexts that are crucial for A2 learners to master.
biết is primarily used for:
Factual knowledge: Knowing a piece of information, a fact, or a detail. For example, knowing someone's name, an address, or a date.Skills or abilities: Knowing 'how to do' something. This is often followed by another verb (e.g., biết bơi - to know how to swim, biết nấu ăn - to know how to cook).Acquaintance or familiarity: Knowing a person, a place, or an item. You are familiar with them.Awareness: Being aware of a situation or that something happened.
hiểu, on the other hand, is used for:
Deep comprehension: Grasping the meaning, logic, or implications of something. This goes beyond just knowing the facts; it involves processing and making sense of information.Understanding a concept: Comprehending abstract ideas, lessons, or complex explanations.Empathy or insight: Understanding someone's feelings, motives, or perspective.The meaning of language: Understanding what is being said or written.
Think of it this way: you can biết a lot of facts about a car (its model, year, color) but not truly hiểu how its engine works. Similarly, you can biết a person's name but not truly hiểu their personality or why they act a certain way.
Example Pairs
Tôi biết anh ấy là người Việt Nam.
I know he is Vietnamese. (factual knowledge)
Tôi hiểu tại sao anh ấy lại làm vậy.
I understand why he did that. (comprehension of reason)
Bạn có biết địa chỉ của quán cà phê đó không?
Do you know the address of that coffee shop? (factual knowledge)
Tôi không hiểu bản đồ này.
I don't understand this map. (comprehension of information)
Cô ấy biết nói tiếng Pháp.
She knows how to speak French. (skill/ability)
Tôi hiểu những gì bạn đang nói.
I understand what you are saying. (comprehension of language)
Tôi biết mặt người đó, nhưng chưa từng nói chuyện.
I know that person's face, but I've never talked to them. (acquaintance)
Tôi hiểu cảm giác của bạn lúc này.
I understand your feelings right now. (empathy)
Mọi người đều biết sự thật này.
Everyone knows this truth. (common knowledge)
Bạn đã hiểu rõ vấn đề chưa?
Have you clearly understood the problem yet? (deep understanding)
Common Patterns
biết + [verb]: To know how to do something. Example: Tôi biết lái xe. (I know how to drive.)biết + [noun/phrase]: To know a fact, a person, or a place. Example: Bạn biết Hà Nội không? (Are you familiar with Hanoi? / Do you know Hanoi?)hiểu + [noun/phrase]: To understand a concept, a situation, or a person. Example: Anh ấy hiểu ý tôi. (He understands my meaning.)hiểu rõ: To understand clearly or thoroughly. Example: Tôi hiểu rõ tầm quan trọng của nó. (I clearly understand its importance.)
Common Mistakes
Mistake 1 — Using "hiểu" for knowing a specific fact
Learners sometimes mistakenly use hiểu when they mean they simply know a piece of information or a fact.
❌ Anh ấy hiểu tên của tôi.
✅ Anh ấy biết tên của tôi.
You don't "understand" a name; you "know" a name. biết is for factual knowledge like names, addresses, or phone numbers.
Mistake 2 — Using "biết" when deep comprehension is needed
It's a common error to use biết when the context requires a deeper understanding of meaning or context.
❌ Tôi biết bài thơ này.
✅ Tôi hiểu bài thơ này.
While you might 'know' the words of a poem (like reciting it), to truly grasp its themes, metaphors, and emotions, you need to 'understand' it (hiểu). The same applies to understanding the deeper meaning of a story or a complex instruction.
Mistake 3 — Confusing "knowing a person" with "understanding a person"
While you can biết a person (be acquainted with them), truly comprehending their personality, motives, or feelings requires hiểu.
❌ Tôi hiểu giám đốc của tôi.
✅ Tôi biết giám đốc của tôi.
✅ Tôi hiểu tính cách giám đốc của tôi.
The first correct sentence means "I know my director" (I am acquainted with them). The second correct sentence means "I understand my director's personality." Simply saying "I understand my director" with hiểu might imply a very deep, almost intimate comprehension of their entire being, which is usually not what's intended for a simple acquaintance. For initial acquaintance, biết is correct.
Quick Quiz
Fill in the blank with biết or hiểu:
- Bạn có _____ cách dùng máy tính này không?
Hint: Are you capable of operating this computer?
Answer
Bạn có biết cách dùng máy tính này không? (Do you know how to use this computer?) — This refers to a skill or ability.
- Anh ấy giải thích nhưng tôi vẫn không _____.
Hint: I still haven't grasped the meaning of his explanation.
Answer
Anh ấy giải thích nhưng tôi vẫn không hiểu. (He explained but I still don't understand.) — This refers to comprehension.
- Tôi _____ một người bạn rất tốt ở Hà Nội.
Hint: I am acquainted with a good friend in Hanoi.
Answer
Tôi biết một người bạn rất tốt ở Hà Nội. (I know a very good friend in Hanoi.) — This refers to acquaintance with a person.