Where does “rost i kalsongen” come from?

rost i kalsongen (Swedish) comes from Swedish i, from Swedish hop, from Old Norse hópr, from Middle Low German hōp, from Old Saxon hōp, from Proto-West Germanic haup, from Proto-Germanic haupaz, from Proto-Indo-European koupos — hill.

Ancestry of “rost i kalsongen”, step by step

rost i kalsongen traces back through 3 separate lines of ancestry.

via Swedish i

StepLanguageWordMeaning
1Swedishiused to signify that an action is done with...
2Swedishhopheap, collection; a whole bunch
3Old Norsehóprheap; group
4Middle Low Germanhōp
5Old Saxonhōp
6Proto-West Germanichaupheap, pile
7Proto-Germanichaupaza heap, pile; a crowd, throng
8Proto-Indo-Europeankouposhill

via Swedish röst

StepLanguageWordMeaning
1Swedishröstvoice; vote
2Germanrōstroofing frame
3Middle High Germanrōst
4Old High Germanrōst
5Old Frenchrostirto roast; to torture by subjecting to fire
6Frankishrōstjanto roast
7Proto-Germanicraustijanąto roast
8Proto-Indo-European*Hrews-

via Swedish kalsongen

StepLanguageWordMeaning
1Swedishkalsongen
Every word from Proto-Indo-European koupos