This is the 611th most frequent Swedish word.
tillhör
"Belongs to."
Here, 'tillhör' is used to indicate possession or ownership.
Hunden tillhör honom.
The dog belongs to him.
In this sentence, 'tillhör' is used to define a category or classification.
Blomman tillhör familjen rosor.
The flower belongs to the rose family.
Here, 'tillhör' expresses that the book is owned or associated with the school library.