Where does “thundercloud” come from?

thundercloud (English) comes from English cloud, from Middle English cloud, from Old English clūd, from Proto-West Germanic klūt, from Proto-Germanic klūtaz, from Proto-Indo-European gelewdos, from Indo-European *gel-.

thundercloud (English): A large, dark cloud, usually a cumulonimbus,...

Definitions

  1. A large, dark cloud, usually a cumulonimbus,...

Ancestry of “thundercloud”, step by step

thundercloud traces back through two separate lines of ancestry.

via English cloud

StepLanguageWordMeaning
1EnglishcloudA rock; boulder; a hill; A visible mass of water...
2Middle EnglishcloudA small elevation; a hill; A clod, lump, or...
3Old Englishclūdmass of stone, rock, boulder, hill; rock, boulder
4Proto-West Germanicklūt—
5Proto-Germanicklūtazlump, clod; boulder, rock; hill
6Proto-Indo-Europeangelewdos—
7Indo-European*gel-—

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...
Every word from Indo-European *gel- →Every word from Proto-Indo-European gelewdos →Every word from Proto-Germanic klūtaz →