This is the 137th most frequent Italian word.
nazionale
"National."
Here, 'nazionale' functions as an adjective to describe something that pertains to a nation or country, specifically the anthem of Italy.
L'inno nazionale italiano si chiama "Il Canto degli Italiani".
The Italian national anthem is called "The Song of the Italians".
Here, 'nazionale' describes 'squadra' (team), indicating it represents the nation in a sports competition.
La squadra nazionale ha vinto il campionato di calcio.
The national team won the soccer championship.
In this sentence, 'nazionale' modifies 'parco' (park) to indicate that it is managed or recognized at the national level for protection.