Where does “underdon” come from?

underdon (Middle English) comes from Old English underdōn, from Proto-Germanic under, from Proto-Indo-European h₁entér, from Proto-Indo-European h₁en — in; in, inside.

Ancestry of “underdon”, step by step

StepLanguageWordMeaning
1Old Englishunderdōnto put under
2Proto-Germanicunderamong, between; under, beneath; under
3Proto-Indo-Europeanh₁entérbetween
4Proto-Indo-Europeanh₁enin; in, inside

Words derived from “underdon”

Every word from Proto-Indo-European h₁en →Every word from Proto-Indo-European h₁entér →Every word from Proto-Germanic under →