Where does “gravlaxsås” come from?

gravlaxsås (Swedish) comes from Swedish sås, 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.

Ancestry of “gravlaxsås”, step by step

gravlaxsås traces back through two separate lines of ancestry.

via Swedish sås

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

via Swedish gravlax

Step	Language	Word	Meaning
1	Swedish	gravlax	gravlax appetizer of dry-cured salmon
2	Swedish	lax	salmon; a bill with nominal value 1000 kronor...
3	Old Norse	lax	salmon
4	Proto-Germanic	lahsaz	salmon
5	Chinese	拉薩	—
6	Tibetan	ལྷ་ས	Lhasa
7	Old Tibetan	ར་ས	—

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