This is the 52nd most frequent Norwegian word.
hvor
"Where."
Here, 'hvor' is used to ask for the location of something, functioning as an interrogative question word.
Hvor er boken?
Where is the book?
In this sentence, 'hvor' is used to introduce a subordinate clause that specifies the location.
Jeg vet ikke hvor hun bor.
I don't know where she lives.
Here, 'hvor' functions as a relative pronoun introducing a clause that provides further information.