Where does “ядро” come from?

ядро (Bulgarian) comes from Russian ядро́, from Proto-Slavic ędro, from Proto-Indo-European h₁en-d(ʰ)r-óm, from Proto-Indo-European h₁én — in.

ядро (Bulgarian): kernel of a nut, pith of a stem

Definitions

  1. kernel of a nut, pith of a stem

Ancestry of “ядро”, step by step

StepLanguageWordMeaning
1Russianядро́seed, stone of a fruit
2Proto-Slavicędrokernel, core
3Proto-Indo-Europeanh₁en-d(ʰ)r-óm—
4Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁en-d(ʰ)r-óm →Every word from Proto-Slavic ędro →