This is the 3706th most frequent Polish word.
koszalinie
"Koszalinie" is the locative case of "Koszalin," referring to being in or about the city of Koszalin in Poland.
Koszalinie appears here in its locative case due to its association with the preposition 'w', specifying location in relation to the event mentioned.
Spotkaliśmy się w Koszalinie na konferencji.
We met in Koszalin for the conference.
Here, the locative case of Koszalin (Koszalinie) is used following the preposition 'w' to explain the place of the activity.
Zakładamy nowe biuro w Koszalinie.
We are opening a new office in Koszalin.
Koszalinie is used in its locative case form to indicate the place where the action is occurring, as required by the preposition 'w'.