Where does “underhum” come from?

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

underhum (English): A background hum

Definitions

  1. A background hum

Ancestry of “underhum”, step by step

underhum traces back through two separate lines of ancestry.

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

via English hum

StepLanguageWordMeaning
1EnglishhumA hummed tune, i.e. created orally with lips...
2Middle Englishhummento hum, buzz, drone, make a murmuring sound to...
Every word from Proto-Indo-European h₁en →
underhum — Etymology, Origin & Word History | Etymology Explorer