Where does “ondergronds” come from?

ondergronds (Dutch) comes from Dutch grond, from Middle Dutch gront, from Old Dutch grunt, from Proto-West Germanic grundu, from Proto-Germanic grunduz, from Proto-Indo-European gʰrem-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

ondergronds (Dutch): underground

Definitions

  1. underground

Ancestry of “ondergronds”, step by step

ondergronds traces back through two separate lines of ancestry.

via Dutch grond

StepLanguageWordMeaning
1Dutchgrondground, dirt, soil; floor, ground; ground, land,...
2Middle Dutchgrontground; bottom; detail, everything particular...
3Old Dutchgruntground
4Proto-West Germanicgrundu
5Proto-Germanicgrunduzground, foundation
6Proto-Indo-Europeangʰrem-to be angry; to sound, bellow, growl, roar, be...
7Proto-Indo-Europeangʰer-to rub; to stroke; to grind

via Dutch onder

StepLanguageWordMeaning
1Dutchonderunder, downwards; under; under, below, beneath,...
2Middle Dutchonder
3Old Dutchunderunder
4Old Saxonundarunder
5Proto-Germanicunderamong, between; under, beneath; under
6Proto-Indo-Europeanh₁entérbetween
7Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European gʰer-Every word from Proto-Indo-European gʰrem-Every word from Proto-Germanic grunduz