Where does “höstdagjämning” come from?

höstdagjämning (Swedish) comes from Swedish dagjämning, from Swedish jämning, from Swedish -ing, from Old Swedish -ing, from Old Norse -ing, from Proto-Germanic -ingō — -ing.

höstdagjämning (Swedish): autumnal equinox

Definitions

autumnal equinox

Ancestry of “höstdagjämning”, step by step

höstdagjämning traces back through two separate lines of ancestry.

via Swedish dagjämning

Step	Language	Word	Meaning
1	Swedish	dagjämning	equinox
2	Swedish	jämning	a levelling, an equilibrium
3	Swedish	-ing	Used to form verbal nouns from verbs; -ing. See...
4	Old Swedish	-ing	Forms gerund nouns from verbs
5	Old Norse	-ing	Forms gerund nouns from verbs
6	Proto-Germanic	-ingō	-ing

via Swedish höst

Step	Language	Word	Meaning
1	Swedish	höst	autumn; the time towards the end of a life; the...
2	Old Norse	hausta	—

Every word from Proto-Germanic -ingō →Every word from Swedish -ing →Every word from Old Norse -ing →