This is the 497th most frequent Slovenian word.
slovenska
"Slovenska" means "Slovenian" or "Slovene" (feminine form) in English.
Here, 'slovenska' is an adjective modifying the noun 'pesem' (song), describing its relation to Slovenia, indicating that the song is Slovenian in origin or style.
To je slovenska pesem.
This is a Slovenian song.
In this context, 'slovenska' functions as an adjective describing the plural noun 'mesta' (cities). The word takes the appropriate gender, number, and case to agree with the noun it modifies.
Obiskali smo slovenska mesta.
We visited Slovenian cities.
Here, 'slovenska' is again an adjective, describing the singular noun 'kultura' (culture). It agrees in singular feminine form with the noun.