This is the 1898th most frequent Chinese word.
哪儿
"哪儿" means "where."
The word "哪儿" is used to ask about the location of the book.
你知道我的书在哪儿吗?
Do you know where my book is?
The word "哪儿" is used to inquire about the destination of movement.
我们出去的时候,你要去哪儿?
When we go out, where do you want to go?
The word "哪儿" is used to seek specific information about the location of the meeting room.