This is the 17930th most frequent Russian word.
ученика
The Russian word "ученика" means "student" or "pupil" (male).
In this sentence, "ученика" denotes the recipient of the action, indicating 'student' in the genitive case due to possession.
Учитель дал учебник ученика для изучения материала.
The teacher gave the textbook to the student for learning the material.
Here, "ученика" is used in the accusative case, referring to 'student' as the object of the action.
Ученика вызвали в кабинет директора за нарушение правил.
The student was called to the principal's office for breaking the rules.
In this context, "ученика" denotes possession, being in the genitive case to indicate something belonging to the 'student'.