Where does “бабисько” come from?

бабисько (Ukrainian) comes from Ukrainian ба́ба, from Proto-Slavic baba, from Proto-Balto-Slavic bā́ˀbāˀ — old woman.

Ancestry of “бабисько”, step by step

StepLanguageWordMeaning
1Ukrainianба́баgrandmother, granny, old woman (in some cases maternal grandmother only)
2Proto-Slavicbabaold woman; grandmother; midwife
3Proto-Balto-Slavicbā́ˀbāˀold woman
Every word from Proto-Balto-Slavic bā́ˀbāˀ →Every word from Proto-Slavic baba →Every word from Ukrainian ба́ба →