Where does “Fledermausärmel” come from?

Fledermausärmel (German) comes from German Ärmel, from Old High German armilo, from Old High German arm, from Proto-West Germanic arm, from Proto-Germanic armaz, from Proto-Indo-European h₂ermos, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Fledermausärmel (German): batwing sleeve

Definitions

  1. batwing sleeve

Ancestry of “Fledermausärmel”, step by step

Fledermausärmel traces back through two separate lines of ancestry.

via German Ärmel

StepLanguageWordMeaning
1GermanÄrmelsleeve
2Old High Germanarmiloarmband
3Old High Germanarmarm; poor, miserable
4Proto-West Germanicarmarm; poor, miserable; pitiful, pitiable
5Proto-Germanicarmazarm; poor, miserable; pitiful, pitiable
6Proto-Indo-Europeanh₂ermos—
7Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via German Fledermaus

StepLanguageWordMeaning
1GermanFledermausmicrobat; bat
2Middle High Germanvledermūs—
3Old High Germanfledarmūs—
4Old High Germanmūsmouse
5Proto-West Germanicmūsmouse
6Proto-Germanicmūsmouse
7Proto-Indo-Europeanmúh₂smouse
Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂ermos →Every word from Proto-Germanic armaz →