Where does “underdrift” come from?

underdrift (English) comes from English drift, from Middle English drift, from Old English drift, from Proto-Germanic driftiz, from Proto-Indo-European dʰreybʰ-, from Proto-Indo-European dʰer- — to support; to hold.

underdrift (English): Having the gearing that turns the millstone beneath the floor

Definitions

  1. Having the gearing that turns the millstone beneath the floor

Ancestry of “underdrift”, step by step

underdrift traces back through two separate lines of ancestry.

via English drift

StepLanguageWordMeaning
1EnglishdriftMovement; that which moves or is moved; The act...
2Middle Englishdrift
3Old Englishdriftan act of driving (cattle, herds, etc.); movement
4Proto-Germanicdriftizdriving
5Proto-Indo-Europeandʰreybʰ-to drive, push
6Proto-Indo-Europeandʰer-to support; to hold

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 dʰer-Every word from Proto-Indo-European dʰreybʰ-Every word from Proto-Germanic driftiz