This is the 140th most frequent Estonian word.
kuhu
"Where to."
In this sentence, 'kuhu' asks for the location where an action should be performed, specifically placing an item.
Kuhu ma panen selle raamatu?
Where should I put this book?
Here, 'kuhu' is used as an interrogative word to ask about a destination.
Kuhu sa lähed?
Where are you going?
This use of 'kuhu' introduces a subordinate clause describing uncertainty about direction or destination.