Where does “sång” come from?

sång (Swedish) comes from Old Swedish sānger, from Old Norse sǫngr, from Proto-Germanic sangwaz, from Proto-Indo-European songʷʰos.

sång (Swedish): a song

Definitions

Step	Language	Word	Meaning
1	Old Swedish	sānger	—
2	Old Norse	sǫngr	song
3	Proto-Germanic	sangwaz	singing, song
4	Proto-Indo-European	songʷʰos	—

sång — Etymology, Origin & Word History | Etymology Explorer