This is the 9798th most frequent Polish word.
zniszczonych
"Zniszczonych" means "destroyed" or "damaged" in English.
Here, "zniszczonych" describes the state of the books in the library, indicating they are damaged or ruined.
Odwiedziliśmy bibliotekę pełną zniszczonych książek.
We visited a library full of damaged books.
In this sentence, "zniszczonych" refers to the condition of the buildings after a destructive event.
Po burzy znaleziono wiele zniszczonych budynków.
After the storm, many destroyed buildings were found.
The word "zniszczonych" is used in this example to refer to the state of the furniture before they were refurbished.