This is the 448th most frequent Finnish word.
neuvostoliiton
"Neuvostoliiton" means "of the Soviet Union" in English, indicating possession or relation.
Here, 'Neuvostoliiton' is in the genitive form, indicating possession or association, meaning 'of the Soviet Union'.
Neuvostoliiton romahtaminen tapahtui vuonna 1991.
The collapse of the Soviet Union occurred in 1991.
In this sentence, 'Neuvostoliiton' is also in the genitive form, modifying 'ajan' (era), and denotes the era associated with the Soviet Union.
Monet ihmiset muistavat vielä Neuvostoliiton ajan.
Many people still remember the Soviet era.
Here, 'Neuvostoliiton' serves as an attribute to 'järjestelmästä' (system), showing the topic of the political system related to the Soviet Union.