This is the 696th most frequent Latvian word.
krievija
"Krievija" means "Russia" in English.
In this sentence, 'Krievija' is used as a proper noun representing the country, Russia.
Krievija ir liela valsts.
Russia is a large country.
Here, 'Krievijas' is the possessive form of 'Krievija,' indicating something belonging to or associated with Russia.
Viņš dzīvo netālu no Krievijas robežas.
He lives near the border of Russia.
In this case, 'Krievijas' again is the possessive form, used to describe the culture belonging to Russia.