This is the 878th most frequent Polish word.
narodowego
"Narodowego" means "national" (genitive singular form in Polish).
Here, 'narodowego' is used as an adjective, modifying 'Park,' indicating that this is a national entity related to a country.
Park Narodowy jest chroniony przed zanieczyszczeniami.
The National Park is protected from pollution.
In this example, 'narodowego' describes 'Flaga,' emphasizing its national significance as a representation of the country.
Flaga Narodowa jest symbolem jedności.
The National Flag is a symbol of unity.
The term 'narodowego' here applies to 'Biblioteka,' specifying its role as a library serving the nation.