Where does “fulmŝtormo” come from?

fulmŝtormo (Esperanto) comes from Esperanto ŝtormo, from English storm, from Middle English storm, from Old English storm, from Proto-West Germanic *sturm, from Proto-Germanic sturmaz, from Proto-Indo-European (s)twer- — to rotate, swirl, twirl, move around; to turn...

fulmŝtormo (Esperanto): thunderstorm

Definitions

  1. thunderstorm

Ancestry of “fulmŝtormo”, step by step

fulmŝtormo traces back through two separate lines of ancestry.

via Esperanto ŝtormo

StepLanguageWordMeaning
1Esperantoŝtormostorm
2EnglishstormAny disturbed state of the atmosphere, especially...
3Middle EnglishstormA storm; an instance of intense wind and...
4Old Englishstormstorm
5Proto-West Germanic*sturmstorm
6Proto-Germanicsturmazstorm
7Proto-Indo-European(s)twer-to rotate, swirl, twirl, move around; to turn...

via Esperanto fulmo

StepLanguageWordMeaning
1Esperantofulmolightning
2Italianfulminelightning
3Latinfulmenlightning; thunderbolt
4Latinfulgmen
5LatinfulgeoI flash, lighten, glitter, gleam, glare, glisten,...
6Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
7Proto-Indo-Europeanbʰōl-
Every word from Proto-Indo-European (s)twer-Every word from Proto-Germanic sturmazEvery word from Proto-West Germanic *sturm