Where does “sweflþrosm” come from?

sweflþrosm (Old English) comes from Old English swefl, from Proto-Germanic sweblaz — sulfur.

sweflþrosm (Old English): sulphurous vapor

Definitions

  1. sulphurous vapor

Ancestry of “sweflþrosm”, step by step

sweflþrosm traces back through two separate lines of ancestry.

via Old English swefl

StepLanguageWordMeaning
1Old Englishsweflsulfur, brimstone
2Proto-Germanicsweblazsulfur

via Old English þrosm

StepLanguageWordMeaning
1Old Englishþrosmvapor, smoke
Every word from Proto-Germanic sweblaz