This is the 889th most frequent Bulgarian word.
донбас
"Донбас" refers to the Donbas region, an industrial area in eastern Ukraine.
Here, 'Донбас' refers specifically to the region being described in the context of its economic characteristics.
Икономиката на Донбас е силно индустриализирана.
The economy of Donbas is highly industrialized.
In this instance, 'Донбас' is used to describe the area affected by significant events causing migration.
Много хора напуснаха Донбас поради конфликта.
Many people left Donbas due to the conflict.
In this sentence, 'Донбас' is used as a proper noun, identifying the name of a region.