zakupiony

In a sentence

• Produkt został zakupiony w sklepie internetowym.

  The product was purchased in an online store.

  This sentence uses the past passive participle 'zakupiony' to describe something that has been bought, focusing on the action of purchasing as the product is now owned.

• Najlepszym zakupionym prezentem okazały się te książki.

  The best purchased gift turned out to be these books.

  Here, 'zakupionym' modifies the noun 'prezentem' in the instrumental case, indicating a characteristic (that the gift was bought).

• Proszę przechować paragon jako dowód, że telefon został zakupiony.

  Please keep the receipt as proof that the phone was purchased.

  This sentence use 'zakupiony' to describe the result of the action (the phone having been bought), making it clear who owns it now.