Where does “underapproximate” come from?

underapproximate (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.

underapproximate (English): To form an underapproximation of

Definitions

  1. To form an underapproximation of

Ancestry of “underapproximate”, step by step

underapproximate 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 approximate

StepLanguageWordMeaning
1EnglishapproximateApproaching; proximate; nearly resembling;...
2Middle Englishapproximat—
Every word from Proto-Indo-European h₁en →Every word from Proto-Indo-European h₁entér →Every word from Proto-Germanic under →