Where does “underbuild” come from?

underbuild (English) comes from English build, from Middle English bylden, from Old English bytlan, from Old English -a, from Proto-Germanic -ō, from Proto-Germanic -ô, from Proto-Indo-European -ō — Derives nouns from roots.

underbuild (English): To build beneath another structure; provide a...

Definitions

  1. To build beneath another structure; provide a...

Ancestry of “underbuild”, step by step

underbuild traces back through two separate lines of ancestry.

via English build

StepLanguageWordMeaning
1EnglishbuildTo form by combining materials or parts; To...
2Middle EnglishbyldenTo lodge: to stay or reside
3Old Englishbytlanto build
4Old English-aEnding forming adverbs; nominative masculine...
5Proto-GermanicCreates feminine nouns from roots and stems
6Proto-Germanic-ly; Forms agent nouns, often from the zero-grade...
7Proto-Indo-EuropeanDerives nouns from roots

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

Words derived from “underbuild

Every word from Proto-Indo-European Every word from Proto-Germanic Every word from Old English -a
underbuild — Etymology, Origin & Word History | Etymology Explorer