This is the 407th most frequent Croatian word.
učenika
"Učenika" means "student" or "pupil" in English (genitive singular or accusative plural form).
In this sentence, 'učenika' is in the accusative case singular form, which signifies the direct object of the verb 'pohvalio' (praised).
Učitelj je pohvalio učenika za njegov trud.
The teacher praised the student for his effort.
Here, 'učenika' is in the genitive case singular form, indicating possession or relation associated with the book.
Imam knjigu učenika kojemu sam posudio.
I have the book of the student to whom I lent it.
In this context, 'učenika' is in the genitive case plural form, showing relationships or concerns associated with multiple students.