This is the 823rd most frequent Slovak word.
slovenské
"Slovenské" means "Slovak" (relating to Slovakia or its language, culture, or people).
In this sentence, 'slovenské' is used as an adjective modifying the noun 'hory' (mountains), indicating their origin as Slovak.
Zbožňujem slovenské hory.
I love Slovak mountains.
Here, 'slovenské' functions as an adjective that describes 'jedlo' (food), specifying that the food is characteristic of Slovakia.
Slovenské jedlo je veľmi chutné.
Slovak food is very delicious.
In this sentence, 'slovenské' is an adjective describing 'knihy' (books), telling us that the books are of Slovak origin or written in Slovak.