This is the 712th most frequent Azerbaijani word.
sergey
The word "sergey" is not an Azerbaijani word; it is a common Russian male name.
The word 'Sergey' is used as a proper noun, referring to a person's name.
Sergey məktəbə getdi.
Sergey went to school.
Here, 'Sergey' is again used as a proper noun, emphasizing the role of the person in an activity.
Sergey dərsdə fəal iştirak edirdi.
Sergey was actively participating in the lesson.
In this sentence, 'Sergey' continues to be a proper noun, indicating the subject who likes reading.