Where does “восточноевропейский” come from?

восточноевропейский (Russian) comes from Russian восто́чный — east, eastern.

восточноевропейский (Russian): Eastern European

Definitions

  1. Eastern European

Ancestry of “восточноевропейский”, step by step

восточноевропейский traces back through two separate lines of ancestry.

via Russian восто́чный

StepLanguageWordMeaning
1Russianвосто́чныйeast, eastern

via Russian европе́йский

StepLanguageWordMeaning
1Russianевропе́йскийEuropean
Every word from Russian восто́чный