Where does “underhaired” come from?

underhaired (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.

underhaired (English): Lacking hair; balding

Definitions

  1. Lacking hair; balding

Ancestry of “underhaired”, step by step

underhaired 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 haired

StepLanguageWordMeaning
1EnglishhairedHaving hair; not bald or hairless; Having some...
2English-edUsed to form past tenses of verbs. In...
3Middle English-edAlternative form of -hede
4Old English-edformed into the likeness of, made into, shaped...
Every word from Proto-Indo-European h₁en →Every word from Proto-Indo-European h₁entér →Every word from Proto-Germanic under →