This is the 716th most frequent Czech word.
čeští
"Čeští" means "Czech" (masculine plural, referring to Czech people).
In this sentence, 'čeští' modifies the noun 'studenti', indicating that the students being referred to are of Czech nationality.
Čeští studenti se učí náročnou gramatiku.
Czech students are learning complex grammar.
Here, 'čeští' describes 'autoři', specifying that the authors in discussion are Czech.
Čeští autoři stále ovlivňují literární svět.
Czech authors still influence the literary world.
In this example, 'čeští' characterizes the noun 'sportovci', signifying the athletes belong to the Czech Republic.