Where does “безразличие” come from?

безразличие (Russian) comes from Russian разли́чие, from Bulgarian ра́злика, from Bulgarian -ка, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

безразличие (Russian): indifference, nonchalance; invariance

Definitions

  1. indifference, nonchalance; invariance

Ancestry of “безразличие”, step by step

безразличие traces back through two separate lines of ancestry.

via Russian разли́чие

StepLanguageWordMeaning
1Russianразли́чиеdifference (quality of being different, used in a comparison)
2Bulgarianра́зликаdifference
3Bulgarian-каfeminine suffix
4Proto-Slavic-ьka—
5Proto-Balto-Slavic-ikaʔ—
6Proto-Indo-European-ikeh₂—

via Russian без

StepLanguageWordMeaning
1Russianбезwithout; minus
2Proto-Slavicbezwithout
3Proto-Indo-European*bʰeǵʰs—

Words derived from “безразличие”

Every word from Proto-Indo-European -ikeh₂ →Every word from Bulgarian -ка →Every word from Proto-Slavic -ьka →