Where does “morsdag” come from?

morsdag (Norwegian Bokmål) comes from Norwegian Bokmål mør, from Norwegian Bokmål moder, from Old Norse móðir, from Proto-Germanic mōdēr, from Proto-Indo-European méh₂tēr — mother.

morsdag (Norwegian Bokmål): Mother's Day

Definitions

Mother's Day

Ancestry of “morsdag”, step by step

morsdag traces back through two separate lines of ancestry.

via Norwegian Bokmål mør

Step	Language	Word	Meaning
1	Norwegian Bokmål	mør	tender
2	Norwegian Bokmål	moder	synonym of mor
3	Old Norse	móðir	mother
4	Proto-Germanic	mōdēr	mother
5	Proto-Indo-European	méh₂tēr	mother

via Norwegian Bokmål dag

Step	Language	Word	Meaning
1	Norwegian Bokmål	dag	a day; the period of time between sunrise and...
2	Old Norse	dagr	a day; days, times
3	Proto-Germanic	dagaz	day; name of the D-rune
4	Proto-Indo-European	dʰegʷʰ-	to burn; warm, hot

Every word from Proto-Indo-European méh₂tēr →Every word from Proto-Germanic mōdēr →Every word from Old Norse móðir →