Where does “gálgi” come from?

gálgi (Icelandic) comes from Old Norse galgi, from Proto-Germanic galgô, from Proto-Indo-European ǵʰAlgʰ-.

gálgi (Icelandic): gallows

Definitions

Step	Language	Word	Meaning
1	Old Norse	galgi	cross-beam, gallows
2	Proto-Germanic	galgô	a rod, pole, stake; a beam, cross-beam, rafter; a...
3	Proto-Indo-European	ǵʰAlgʰ-	—

gálgi — Etymology, Origin & Word History | Etymology Explorer