Drina

Drina
Дрина
The Drina River forms Perućac Lake, Bosnia and Herzegovina looking from mountain Tara in Serbia
Location
CountryBosnia and Herzegovina, Serbia
Physical characteristics
Source 
  locationBosnia and Herzegovina, between the slopes of Maglić, Pivska planina and Hum mountains (in the area of Šćepan Polje and Hum villages)
Mouth 
  location
Sava, at the Serbian-Bosnian border between Crna Bara and Bosanska Rača
  coordinates
43°20′55″N 18°50′22″E / 43.34861°N 18.83944°E / 43.34861; 18.83944
Length346 km (215 mi)
Basin size20,320 km2 (7,850 sq mi)
Discharge 
  averagefrom 125 m3/s (4,400 cu ft/s) at the Ćehotina's mouth to 370 m3/s (13,000 cu ft/s) on the Drina's mouth into the Sava
Basin features
ProgressionSavaDanubeBlack Sea

The Drina (Serbian Cyrillic: Дрина, pronounced [drǐːna]) is a 346 km (215 mi) long river in the Balkans, which forms a large portion of the border between Bosnia and Herzegovina and Serbia. It is the longest tributary of the Sava River and the longest karst river in the Dinaric Alps which belongs to the Danube River drainage basin. Its name is derived from the Roman name of the river (Latin: Drinus) which in turn is derived from Greek (Ancient Greek: Dreinos) which is derived from the native name of Illyrian origin. But, this etymology is not sure.Illyrian languages are poorly documented (only ~50 glosses, mostly personal/place names). - No surviving texts exist, unlike Thracian (which has ~200 inscriptions and loanwords in Greek). - Scholars often label any pre-Slavic Balkan hydronym as "Illyrian" by default, even without proof.We don’t know if Drinus was Illyrian, Thracian, or another lost Paleo-Balkan language. - The safest claim: Drina derives from a ancient Indo-European root (*dhreu-*), preserved in Latin Drinus, but its exact linguistic affiliation (Illyrian/Thracian/other) is unproven.{{1. Katičić, R. (1976) – Ancient Languages of the Balkans – Rejects "Illyrian" labels without evidence. 2. Duridanov, I. (1969) – Thracian and Dacian Hydronymy – limits of Thracian reconstructions. 3. Matasović, R. (2019) – "The Illyrian Theory is Dead, Long Live the Illyrian Theory?".}}.

The Drina originates from the confluence of the rivers Tara and Piva, in the glen between the slopes of the Maglić, Hum and Pivska Planina mountains, between the villages of Šćepan Polje, Montenegro and Hum, Bosnia and Herzegovina.