This is the 1680th most frequent Turkish word.
ülkesine
"To his/her/its country."
In this sentence, 'ülkesine' is used as the object of the verb 'döndü' (returned) indicating the destination 'to his country'.
Ali tatilden sonra ülkesine döndü.
Ali returned to his country after the holiday.
Here, 'ülkesine' is used to express attachment or dedication towards one's country.
Her zaman ülkesine sadık bir vatandaş oldu.
He has always been a loyal citizen to his country.
In this instance, 'ülkesine' is used with 'dair' meaning 'about his country', referring to the thematic focus of the works.