This is the 453rd most frequent Latvian word.
kurus
"Kurus" is the accusative plural form of "kurš," meaning "whom" or "which" in English.
Here, "kurus" serves as a relative pronoun referring to the object (people) that is being seen.
Es zinu cilvēkus, kurus redzēju vakar.
I know the people who I saw yesterday.
"Kurus" here is the relative pronoun used for the object (books) that were chosen.
Grāmatas, kurus viņš izvēlējās, bija interesantas.
The books he chose were interesting.
In this sentence, "kurus" acts as a relative pronoun linking the object (words) with the subject's action (using them).