This is the 167th most frequent Serbian word.
сарајеву
"Сарајеву" is the dative or locative case of "Сарајево," meaning "Sarajevo," the capital city of Bosnia and Herzegovina.
Here, 'Сарајеву' is the locative case form of 'Сарајево', used to indicate location.
Био сам у Сарајеву прошле године.
I was in Sarajevo last year.
In this sentence, 'Сарајево' is in its basic nominative form, indicating the destination.
Овог лета планирамо отпутовати у Сарајево.
This summer, we plan to travel to Sarajevo.
'Сарајево' is in the nominative case here, as it serves as the subject of the sentence.