Where does “groundburst” come from?

groundburst (English) comes from English ground, from Middle English ground, from Old English grund, from Proto-Germanic grunduz, from Proto-Indo-European gʰrem-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

groundburst (English): The explosion of a bomb dropped from the air when...

Definitions

  1. The explosion of a bomb dropped from the air when...

Ancestry of “groundburst”, step by step

groundburst traces back through two separate lines of ancestry.

via English ground

StepLanguageWordMeaning
1EnglishgroundThe surface of the Earth, as opposed to the sky...
2Middle Englishgroundground; Earth
3Old Englishgrundground; bottom, foundation; abyss, depths
4Proto-Germanicgrunduzground, foundation
5Proto-Indo-Europeangʰrem-to be angry; to sound, bellow, growl, roar, be...
6Proto-Indo-Europeangʰer-to rub; to stroke; to grind

via English burst

StepLanguageWordMeaning
1EnglishburstTo break from internal pressure; To cause to...
2Middle EnglishbrestenTo burst break from internal pressure
3Old Englishberstanto break, shatter, burst
4Proto-Germanic*brestan
5Proto-Germanicbrestanąto burst, break, sunder, split, crack
6Proto-Indo-Europeanbʰres‑to burst; break; crack; crackle
Every word from Proto-Indo-European gʰer-Every word from Proto-Indo-European gʰrem-Every word from Proto-Germanic grunduz