Where does “кисель” come from?

кисель (Old East Slavic) comes from Russian кисе́ль, from Old East Slavic кысель, from Proto-Slavic kyselь, from Proto-Slavic kysnǫti — to become/get wet; to become/turn sour.

Ancestry of “кисель”, step by step

StepLanguageWordMeaning
1Russianкисе́льkisel, kissel (a popular jellied dessert made by cooking berry juice or other fruit juice with milk, flour and oatmeal, thickened with starch)
2Old East Slavicкысель
3Proto-Slavickyselь
4Proto-Slavickysnǫtito become/get wet; to become/turn sour

Words derived from “кисель

Every word from Proto-Slavic kysnǫtiEvery word from Proto-Slavic kyselьEvery word from Old East Slavic кысель