Where does “соль” come from?

соль (Old East Slavic) comes from Proto-Slavic sȏlь, from Proto-Balto-Slavic *sāˀlis, from Proto-Indo-European *sḗh₂l — salt.

Ancestry of “соль”, step by step

StepLanguageWordMeaning
1Proto-Slavicsȏlьsalt
2Proto-Balto-Slavic*sāˀlis—
3Proto-Indo-European*sḗh₂lsalt
Every word from Proto-Indo-European *sḗh₂l →Every word from Proto-Balto-Slavic *sāˀlis →Every word from Proto-Slavic sȏlь →