Question

what is the meaning of _" I don't know.​

Answer 1

Explanation:

don't know mean is express

ex

if they angry for any reason we don't know what is that

Answer 2

This sentence is usually used for replying someone's question

Example,

Teacher: Does Kajal your friend, is going for a long vacation?

You: I dont know.

If you dont have any idea about what has been asked to you, you can surely say ' I don't know '

Thank You !