The Dniester (ˈniːstər ) is a transboundary river in Eastern Europe. It runs first through Ukraine and then through Moldova (from which it more or less separates the breakaway territory of Transnistria), finally discharging into the Black Sea on Ukrainian territory again. The name Dniester derives from Sarmatian dānu nazdya "the close river." (The Dnieper, also of Sarmatian origin, derives from the opposite meaning, "the river on the far side".) Alternatively, according to Vasily Abaev Dniester would be a blend of Scythian dānu "river" and Thracian Ister, the previous name of the river, literally Dān-Ister (River Ister). The Ancient Greek name of Dniester, Tyras (Τύρας), is from Scythian tūra, meaning "rapid." The names of the Don and Danube are also from the same Indo-Iranian word *dānu "river". Classical authors have also referred to it as Danaster. These early forms, without -i- but with -a-, contradict Abaev's hypothesis. Edward Gibbon refers to the river both as the Niester and Dniester in his History of the Decline and Fall of the Roman Empire. In Ukrainian, it is known as Дністе́р (translit. Dnister), and in Romanian as Nistru. In Russian, it is known as Днестр (translit. Dnestr), in Yiddish: Nester נעסטער; in Turkish, Turla; and in Lithuanian as Dniestras. The Dniester rises in Ukraine, near the city of Drohobych, close to the border with Poland, and flows toward the Black Sea. Its course marks part of the border of Ukraine and Moldova, after which it flows through Moldova for , separating the main territory of Moldova from its breakaway region Transnistria. It later forms an additional part of the Moldova-Ukraine border, then flows through Ukraine to the Black Sea, where its estuary forms the Dniester Liman. Along the lower half of the Dniester, the western bank is high and hilly while the eastern one is low and flat. The river represents the de facto end of the Eurasian Steppe. Its most important tributaries are Răut and Bîc. During the Neolithic, the Dniester River was the centre of one of the most advanced civilizations on earth at the time.