This is the 3807th most frequent Turkish word.
ülkesinde
"In their/her/his country."
Here, 'ülkesinde' is used to mean 'in his country,' indicating that the action took place within the boundaries of his own country.
O, Finlandiya'nın kuzeyindeki bir kasabada ülkesinde yaşamıştı.
He had lived in his country in a town in northern Finland.
'Ülkesinde' is used to mean 'in their own country,' showing ownership and reference to the location of the activity.
Tarih boyunca birçok bilim insanı kendi ülkesinde yaptıkları araştırmalarla tanınmıştır.
Throughout history, many scientists have been known for their research conducted in their own country.
The word 'ülkesinde' here refers to 'in his country,' denoting the scope of the politician's promises.