Where does “thunderflash” come from?

thunderflash (English) comes from English thunder, from Middle English thunder, from Old English Þunor, from Proto-West Germanic þunr, from Proto-Germanic Þunraz, from Proto-Indo-European (s)ten- — to thunder, rustle, rumble, drone, groan; to...

thunderflash (English): A pyrotechnic device that generates a loud noise,...

Definitions

  1. A pyrotechnic device that generates a loud noise,...

Ancestry of “thunderflash”, step by step

thunderflash traces back through two separate lines of ancestry.

via English thunder

StepLanguageWordMeaning
1EnglishthunderThe loud rumbling, cracking, or crashing sound...
2Middle EnglishthunderAlternative form of thonder
3Old EnglishÞunorthe Anglo-Saxon god of thunder, equivalent to Old Norse Þórr and Old High German Donar
4Proto-West Germanicþunrthunder
5Proto-GermanicÞunrazThor, god of thunder
6Proto-Indo-European(s)ten-to thunder, rustle, rumble, drone, groan; to...

via English Flash

StepLanguageWordMeaning
1EnglishFlashA multimedia platform, most often used for adding animation and interactivity to webpages
2Middle Englishflasshen
Every word from Proto-Indo-European (s)ten-