This is the 72nd most frequent Latvian word.
kuras
The Latvian word "kuras" means "which" (feminine plural genitive/accusative form).
Here, "kuras" acts as a relative pronoun introducing a subordinate clause and refers to a feminine noun in the genitive case.
Es satiku cilvēku, kuras brālis dzīvo Īrijā.
I met a person whose brother lives in Ireland.
Here, "kuras" is a relative pronoun that refers to a plural feminine antecedent and is in the accusative case indicating the object of the verb 'to read'.
Šīs ir grāmatas, kuras man ļoti patīk lasīt.
These are the books which I really enjoy reading.
In this case, "kuras" connects the noun 'problem' with its descriptive phrase, functioning as a relative pronoun in the genitive case, linking possession or association.