Where does “косточка” come from?

косточка (Russian) comes from Russian кость, from Proto-Slavic kostь, from Proto-Indo-European kost-.

косточка (Russian): (little) bone

Definitions

  1. (little) bone

Ancestry of “косточка”, step by step

StepLanguageWordMeaning
1Russianкостьbone; die
2Proto-Slavickostьbone
3Proto-Indo-Europeankost-—
Every word from Proto-Indo-European kost- →Every word from Proto-Slavic kostь →Every word from Russian кость →