This is the 14143rd most frequent Polish word.
poświęconego
"Poświęconego" means "consecrated" or "dedicated" in English.
In this sentence, 'poświęconego' is used as an adjective describing the worship ('kultu'), indicating that it is consecrated or dedicated, typically in a religious sense.
Kościół jest miejscem poświęconego kultu.
The church is a place of dedicated worship.
Here, 'poświęconego' functions as an attributive adjective qualifying the book's dedication, indicating that the book is written in homage to the national hero.
Czytaliśmy książkę poświęconego bohaterowi narodowemu.
We were reading a book dedicated to the national hero.
In this example, 'poświęconego' corresponds to the effort ('wysiłku') made with dedication by the chefs, modifying the noun to indicate the nature of their contribution.