A borrowing from Russian Сиби́рь (Sibírʹ) + -ija. Originally the name of a 14th-century Tatar fortress at Qashliq (Tobolsk), later the capital of the 16th-century Khanate of Sibir. With the Russian conquest of Northern Asia, the name was extended to the areas beyond the Ob river.
Sibīrija f (4th declension)
- Siberia (the Asian part of Russia, from the Urals to the Pacific Ocean)
Sibīrija ietver apmēram 56% no Krievijas teritorijas ― Siberia contains about 56% of the territory of Russia