The story
From Dnieper + Bulgarian, Macedonian, Russian, Serbo-Croatian, and Ukrainian доли́на (dolýna, “valley”) or Belarusian даліна (dalina, “valley”).
Etymology from Wiktionary, CC BY-SA 4.0.
Dnieper Valley
Today it means: A relief feature, river valley along the Dnieper up to 18km wide Full definition →