This is the 16218th most frequent Polish word.
upieczona
"Upieczona" means "baked" in English.
In this sentence, 'upieczona' is used as an adjective describing the noun 'babka', indicating that the cake has been baked.
Upieczona babka była bardzo smaczna.
The baked cake was very tasty.
Here, 'upieczona' serves as an adjective for 'pizza', showing that the pizza has undergone the baking process.
Kiedy wróciłem do domu, upieczona pizza czekała na stole.
When I returned home, the baked pizza was waiting on the table.
In this example, 'upieczona' describes 'szarlotka' and is part of a phrase specifying that the pie was baked by him.