This is the 11935th most frequent Polish word.
kupione
"Kupione" means "bought" in English.
The word 'kupione' is used as a past participle indicating that the books have been bought.
Te książki zostały kupione w księgarni.
These books were bought in a bookstore.
The word 'kupione' here signifies that all necessary items for the party are already purchased.
Dziś wszystko jest już kupione na przyjęcie.
Everything is already bought for the party today.
The term 'kupione' refers to products that were procured from the store, used as an adjective to describe the products.