Questions & Answers about Kolorowa piłka leży na boisku.
Because Polish adjectives must agree with the noun they describe in gender, number, and case.
That is why you get:
- kolorowa piłka = colorful ball
If the noun were masculine, you would use kolorowy instead.
Piłka means ball.
It is a common Polish noun used for many kinds of balls, for example:
- piłka nożna = football / soccer ball
- piłka tenisowa = tennis ball
In this sentence, piłka is just a ball.