Where does “underhair” come from?

underhair (English) comes from English Hair, from Middle English hēr, from Old English hēr, from Proto-West Germanic *hēr, from Proto-Germanic hē₂r, from Proto-Indo-European ḱe, from Middle English kyt, from German kitt — to bend; curve; arch; vault; to bow, bend, arch,...

underhair (English): undercoat, underfur; pubic hair

Definitions

  1. undercoat, underfur; pubic hair

Ancestry of “underhair”, step by step

underhair traces back through two separate lines of ancestry.

via English Hair

StepLanguageWordMeaning
1EnglishHairA pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals
2Middle Englishhēra hair
3Old Englishhērat this place
4Proto-West Germanic*hērhere
5Proto-Germanichē₂rhere, in this place
6Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
7Middle Englishkyt
8Germankittputty certain kinds of cement used for fixing e.g. window panes
9Old High Germankuti
10Proto-West Germanickwidugum, resin
11Proto-Germanickweduzresin
12Proto-Indo-Europeangʷet-resin, gum; to say, speak
13Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

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 gū-Every word from Proto-Indo-European gʷet-Every word from Proto-Germanic kweduz