This is the 270th most frequent Ukrainian word.
сергій
"Сергій" is the Ukrainian form of the male given name "Sergiy," equivalent to "Sergius" or "Sergey" in English.
The word 'Сергій' is used as a proper noun indicating the subject of the sentence.
Сергій пішов до бібліотеки.
Serhiy went to the library.
The word 'Сергій' here indicates the name of a participant in the event.
На зустрічі був присутній Сергій.
Serhiy was present at the meeting.
The word 'Сергій' signifies the sender of the letter in this context.