Where does “sos” come from?

sos (Polish) comes from French sauce, from Old French sause, from Vulgar Latin salsa, from Latin salsus, from Latin sāl, from Proto-Italic sāls, from Proto-Indo-European *sḗh₂l — salt.

sos (Polish): sauce

Definitions

sauce

Ancestry of “sos”, step by step

Step	Language	Word	Meaning
1	French	sauce	sauce
2	Old French	sause	sauce (condiment)
3	Vulgar Latin	salsa	nominative feminine singular of salsus;...
4	Latin	salsus	salty, briny; salted; witty
5	Latin	sāl	salt
6	Proto-Italic	sāls	salt
7	Proto-Indo-European	*sḗh₂l	salt

Every word from Proto-Indo-European *sḗh₂l →Every word from Proto-Italic sāls →Every word from Latin sāl →