Where does “fulmofermilo” come from?

fulmofermilo (Esperanto) comes from Esperanto fermilo, from Esperanto Fermi, from French fermer, from Old French fermer, from Latin firmō, from Latin Firmus, from Proto-Italic fermos, from Proto-Indo-European dʰer-mo-s — to support; to hold.

fulmofermilo (Esperanto): zip fastener, zipper

Definitions

  1. zip fastener, zipper

Ancestry of “fulmofermilo”, step by step

fulmofermilo traces back through two separate lines of ancestry.

via Esperanto fermilo

StepLanguageWordMeaning
1Esperantofermilolock; fastener
2EsperantoFermito close, to shut
3Frenchfermerto shut; to close
4Old Frenchfermerto close
5Latinfirmōto make firm, strengthen, harden, fortify
6LatinFirmusstrong, powerful
7Proto-Italicfermos
8Proto-Indo-Europeandʰer-mo-sholding
9Proto-Indo-Europeandʰer-to support; to hold

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 dʰer-Every word from Proto-Indo-European dʰer-mo-sEvery word from Proto-Italic fermos