How to Say "I don't know" in Vietnamese
The most natural way to say "I don't know" in Vietnamese is Tôi không biết. Tap the speaker above to hear it, then say it back out loud. That is the fastest way to make it stick.
Other ways to say it
When to use it
Use this phrase when you genuinely do not have the information someone is asking for. It can be used in both formal and informal settings. It's a polite way to express your lack of knowledge on a topic.
Say it out loud, get corrected
Reading it is not the same as saying it. Practice "I don't know" and thousands more with an AI coach that listens.
Examples in Vietnamese
| Vietnamese | English |
|---|---|
| Tôi không biết câu trả lời cho câu hỏi này. | I don't know the answer to this question. |
The fastest way to remember it
Vocabulary you only read fades fast. Vocabulary you say out loud sticks. Hear Tôi không biết, repeat it a few times, then use it in a real sentence. SPAIKING lets you practice exactly that, speaking Vietnamese with a coach that corrects your pronunciation in real time. You can start with two free conversations.
Frequently asked questions
How do I say 'I don't know' in a more casual way?
You can say 'Mình không biết' when speaking with friends.
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