This is the 7663rd most frequent Polish word.
litwa
"Litwa" in English means "Lithuania."
Litwa is used as a proper noun, referring to the country Lithuania.
Litwa jest pięknym krajem nad Bałtykiem.
Lithuania is a beautiful country by the Baltic Sea.
Litwą here is the instrumental form of Litwa, used in the context of managing it.
Gra w gry strategiczne pozwala na rządzenie Litwą.
Playing strategy games allows one to govern Lithuania.
Litwy is the genitive form, indicating possession or relation to Lithuania.