Where does “sos” come from?

sos (Swedish) comes from Swedish söder, from Old Norse suðr, from Proto-Germanic sunþrą, from Proto-Indo-European sóh₂wl̥ — sun.

Definitions

Ancestry of “sos”, step by step

StepLanguageWordMeaning
1Swedishsödersouth; one of the four major compass points;...
2Old Norsesuðrsouth; southern; southwards
3Proto-Germanicsunþrąsouth; south, southward
4Proto-Indo-Europeansóh₂wl̥sun
Every word from Proto-Indo-European sóh₂wl̥ →Every word from Proto-Germanic sunþrą →Every word from Old Norse suðr →