This is the 9475th most frequent Russian word.
украина
"Украина" translates to "Ukraine," the name of a country in Eastern Europe.
Here, 'Украина' is used as a proper noun referring to the country, serving as the subject of the sentence in nominative case.
Украина — это страна в Восточной Европе.
Ukraine is a country in Eastern Europe.
In this sentence, 'Украина' is used as the complement of the preposition 'из', which indicates origin, and it is in the genitive case ('Украины').
Моя бабушка приехала из Украины много лет назад.
My grandmother came from Ukraine many years ago.
'Украину' is in the accusative case as it serves as the direct object of the verb 'посетить' (to visit), indicating the destination of the action.