Where does “underfocus” come from?

underfocus (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.

underfocus (English): The state of a microscope that is focused...

Definitions

  1. The state of a microscope that is focused...

Ancestry of “underfocus”, step by step

underfocus 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 focus

StepLanguageWordMeaning
1EnglishfocusA point at which reflected or refracted rays of...
2Latinfocusfireplace, hearth; firepan, coal pan, brazier;...
Every word from Proto-Indo-European h₁en →Every word from Proto-Indo-European h₁entér →Every word from Proto-Germanic under →
underfocus — Etymology, Origin & Word History | Etymology Explorer