Where does “squaring shear” come from?

squaring shear (English) comes from English shear, from Middle English schyre, from Old English sċīr, from Old English burna, from Proto-West Germanic brunnō, from Proto-Germanic brunnô, from Proto-Indo-European bʰréh₁wr̥, from Proto-Indo-European bʰrewh₁- — to bear, carry.

squaring shear (English): A machine, often operated by foot pedal or hydraulics, used to cut sheet metal in a straight line to create 90-degree angles and trim edges to create perpendicular corners

Definitions

  1. A machine, often operated by foot pedal or hydraulics, used to cut sheet metal in a straight line to create 90-degree angles and trim edges to create perpendicular corners

Ancestry of “squaring shear”, step by step

squaring shear traces back through two separate lines of ancestry.

via English shear

StepLanguageWordMeaning
1EnglishshearTo cut, originally with a sword or other bladed...
2Middle EnglishschyreAlternative form of shire; bright, shimmering,...
3Old Englishsċīrbright; shire; county
4Old Englishburnastream
5Proto-West Germanicbrunnōwell, spring
6Proto-Germanicbrunnôsource; wellspring; fountain; brook; stream;...
7Proto-Indo-Europeanbʰréh₁wr̥well, spring, source
8Proto-Indo-Europeanbʰrewh₁-to boil; to brew
9Proto-Indo-Europeanbʰer-to bear, carry

via English squaring

StepLanguageWordMeaning
1Englishsquaringpresent participle of square; The act or process...
Every word from Proto-Indo-European bʰer-Every word from Proto-Indo-European bʰrewh₁-Every word from Proto-Indo-European bʰréh₁wr̥