Where does “helgedom” come from?

helgedom (Swedish) comes from Swedish helig, from Old Swedish hēlagher, from Old Norse heilagr, from Proto-Germanic hailagaz, from Proto-Germanic hailaz, from Proto-Indo-European *kéh₂ilos — healthy.

helgedom (Swedish): a sanctuary, a shrine, a holy place (place dedicated to a deity, like a church, temple, or the like)

Definitions

a sanctuary, a shrine, a holy place (place dedicated to a deity, like a church, temple, or the like)

Ancestry of “helgedom”, step by step

helgedom traces back through two separate lines of ancestry.

via Swedish helig

Step	Language	Word	Meaning
1	Swedish	helig	holy
2	Old Swedish	hēlagher	holy, sacred
3	Old Norse	heilagr	holy; inviolable, sacred
4	Proto-Germanic	hailagaz	holy, sacred
5	Proto-Germanic	hailaz	whole, unbroken, intact; entire, complete; hale,...
6	Proto-Indo-European	*kéh₂ilos	healthy

via Swedish dom

Step	Language	Word	Meaning
1	Swedish	dom	conviction, judgement of court, sentence,...
2	Old Norse	dómr	judgement
3	Proto-Germanic	dōmaz	judgement
4	Proto-Indo-European	dʰóh₁mos	that which is put, placed
5	Proto-Indo-European	dʰeh₁-	to do, put, place

Every word from Proto-Indo-European *kéh₂ilos →Every word from Proto-Germanic hailaz →Every word from Proto-Germanic hailagaz →