This is the 3943rd most frequent Russian word.
донецком
"Донецком" is the prepositional case of "Донецк," meaning "in Donetsk," referring to the city in Ukraine.
Used as an adjectival form describing the district related to Donetsk.
Я родился в Донецком районе.
I was born in the Donetsk district.
Used as an adjectival form describing the university related to Donetsk.
В Донецком университете изучают множество предметов.
Many subjects are studied at Donetsk University.
Used as an adjectival form describing the meeting related to miners in Donetsk.