This is the 108th most frequent Croatian word.
neki
"Some" or "certain."
The word 'neke' means 'some' and here points to an unspecified number of interesting books.
Vidio sam neke zanimljive knjige u knjižnici.
I saw some interesting books in the library.
The word 'neki' indicates a subset of people without specifying which group.
Neki ljudi vole čitati poeziju.
Some people like to read poetry.
The word 'nekakav' ('neki' in a specific form) refers to an undefined type of gift.