Where does “lauss” come from?

lauss (Old Norse) comes from Proto-Germanic lausaz, from Proto-Indo-European lewH- — louse.

lauss (Old Norse): loose

Definitions

Step	Language	Word	Meaning
1	Proto-Germanic	lausaz	loose, free; empty, devoid; false, untrue
2	Proto-Indo-European	lewH-	louse

lauss — Etymology, Origin & Word History | Etymology Explorer