Where does “kosteczka” come from?

kosteczka (Polish) comes from Polish kostka, from Old Polish kostka, from Proto-Slavic kostъka, from Proto-Slavic -ъka, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

Ancestry of “kosteczka”, step by step

StepLanguageWordMeaning
1PolishkostkaDiminutive of kość; die; cube
2Old Polishkostkabones, remains of saints' bodies, relics
3Proto-Slavickostъkasmall bone
4Proto-Slavic-ъkaDenominal, forms diminutives; Deadjectival,...
5Proto-Indo-European-kosCreates deadjectival and desubstantival...
Every word from Proto-Indo-European -kos →Every word from Proto-Slavic -ъka →Every word from Proto-Slavic kostъka →