This is the 34th most frequent Czech word.
kteří
The Czech word "kteří" translates to "who" or "which" (used for masculine animate plural relative pronouns).
Here, 'kteří' serves as a relative pronoun referring back to 'Ti,' describing the subset of individuals being discussed.
Ti, kteří se pravidelně připravují, jsou většinou klidnější během zkoušek.
Those who prepare regularly are usually calmer during exams.
In this example, 'kteří' functions as a relative pronoun, specifying the group of 'Přátelé' in the context of the assistance they provided.
Přátelé, kteří nám pomohli, jsou opravdu spolehliví.
The friends who helped us are really reliable.
This demonstrates the use of 'kteří' as a relative pronoun connecting the main clause with the relative clause providing additional information about 'Studenti'.