Where does “förstubro” come from?

förstubro (Swedish) comes from Swedish bro, from Old East Norse brō, from Proto-Germanic brōwō, from Proto-Indo-European bʰruh- — beam; bridge; beam, bridge.

Ancestry of “förstubro”, step by step

förstubro traces back through two separate lines of ancestry.

via Swedish bro

StepLanguageWordMeaning
1Swedishbroa bridge; a construction that spans a divide; a...
2Old East Norsebrō
3Proto-Germanicbrōwōbridge; brow
4Proto-Indo-Europeanbʰruh-beam; bridge; beam, bridge

via Swedish förstuga

StepLanguageWordMeaning
1Swedishförstugaan entry, a vestibule (small room or space right inside the front door of a house)
Every word from Proto-Indo-European bʰruh-Every word from Proto-Germanic brōwōEvery word from Old East Norse brō