This is the 12529th most frequent Polish word.
należące
"Belonging"
Describing possession; in a participial form modifying 'domy'.
Domy należące do fundacji są zadbane.
The houses belonging to the foundation are well-maintained.
Indicating ownership or association; used as an adjective participle modifying 'dokumenty'.
Znaleźliśmy dokumenty należące do rodziny Kowalskich.
We found documents belonging to the Kowalski family.
Showing possession; participle used to describe the subject 'książki'.