Where does “солостити” come from?

солостити (Old East Slavic) comes from Proto-Slavic solstь, from Proto-Slavic sòldъkъ, from Proto-Balto-Slavic salˀdus, from Proto-Indo-European séh₂l-.

Ancestry of “солостити”, step by step

StepLanguageWordMeaning
1Proto-Slavicsolstьpleasure, satisfaction
2Proto-Slavicsòldъkъsweet
3Proto-Balto-Slavicsalˀdus—
4Proto-Indo-Europeanséh₂l-—
Every word from Proto-Indo-European séh₂l- →Every word from Proto-Balto-Slavic salˀdus →Every word from Proto-Slavic sòldъkъ →