This is the 16314th most frequent Polish word.
utworzył
"Utworzył" means "he created" or "he formed."
Here, "utworzył" is used to mean "created" something artistic or innovative, specifically a melody.
On utworzył piękną melodię na pianinie.
He created a beautiful melody on the piano.
In this context, "utworzyła" is used to convey the act of officially establishing or setting up a new entity.
Firma utworzyła nową filię w Warszawie.
The company established a new branch in Warsaw.
In this usage, "utworzył się" implies that something came into existence naturally or as a result of circumstances.