Where does “underdrag” come from?

underdrag (English) comes from English drag, from Yiddish טראָגן, from Middle High German tragen, from Old High German tragan, from Proto-Germanic dragan, from Proto-Germanic draganą, from Proto-Indo-European dʰreǵ- — pull, draw, drag; to glide, swoop; to draw, glide.

underdrag (English): The tensile stress exerted by an overthrust rock...

Definitions

  1. The tensile stress exerted by an overthrust rock...

Ancestry of “underdrag”, step by step

underdrag traces back through two separate lines of ancestry.

via English drag

StepLanguageWordMeaning
1EnglishdragResistance of a fluid to something moving through...
2Yiddishטראָגןcarry; wear
3Middle High Germantragento bear, to carry
4Old High Germantraganto bear; to bear fruit
5Proto-Germanicdragan
6Proto-Germanicdraganąto draw, to pull, to carry
7Proto-Indo-Europeandʰreǵ-pull, draw, drag; to glide, swoop; to draw, glide

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European dʰreǵ-Every word from Proto-Germanic draganąEvery word from Proto-Germanic dragan