Where does “underfill” come from?

underfill (English) comes from English Fill, from Middle English fillen, from Old English fyllan, from Proto-West Germanic *fullijan, from Proto-Germanic fullijaną, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

underfill (English): To fill with an insufficient amount

Definitions

  1. To fill with an insufficient amount

Ancestry of “underfill”, step by step

underfill traces back through two separate lines of ancestry.

via English Fill

StepLanguageWordMeaning
1EnglishFillTo make full
2Middle Englishfillento fill
3Old Englishfyllanto fill; Alternative form of fiellan
4Proto-West Germanic*fullijanto fill
5Proto-Germanicfullijanąto fill, to make full
6Proto-Germanicfullazfull; the whole, the entire
7Proto-Indo-Europeanpl̥h₁nósfull
8Proto-Indo-Europeanpleh₁-to fill

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 pleh₁- →