This is the 2755th most frequent Russian word.
карелии
"Карелии" refers to "Karelia," a geographical and cultural region in Northern Europe, divided between Russia and Finland.
The word 'Карелии' is used here in the locative case to indicate traveling within the region of Karelia.
Я путешествовал по Карелии летом.
I traveled across Karelia in the summer.
The word 'Карелии' is used in the locative case to specify the destination to Karelia.
До Карелии можно добраться на автобусе.
You can reach Karelia by bus.
The word 'Карелии' is used in the prepositional case following the preposition 'о' to indicate discussing the topic of Karelia.