Where does “Rücktrittsbremse” come from?

Rücktrittsbremse (German) comes from German Rücktritt, from German rück-, from Middle High German rücke, from Old High German rucki, from Proto-West Germanic hrugi, from Proto-Germanic hrugjaz, from Proto-Indo-European (s)krewk-, from Proto-Indo-European (s)ḱer- — dung, manure, filth; manure, dung, filth.

Ancestry of “Rücktrittsbremse”, step by step

Rücktrittsbremse traces back through two separate lines of ancestry.

via German Rücktritt

StepLanguageWordMeaning
1GermanRücktrittresignation, demission; rescission, cancelation;...
2Germanrück-back
3Middle High Germanrückeback
4Old High Germanruckiback
5Proto-West Germanichrugiback; spine
6Proto-Germanichrugjazback; spine; ridge
7Proto-Indo-European(s)krewk-to turn, bend
8Proto-Indo-European(s)ḱer-dung, manure, filth; manure, dung, filth

via German brēmse

StepLanguageWordMeaning
1Germanbrēmsebrake, device for causing deceleration
2Middle Low Germanbrēmse
3Old Saxonbrimissa
4Old Saxon*brummōn
5Proto-West Germanic*brummōnto drone, hum, growl
Every word from Proto-Indo-European (s)ḱer-Every word from Proto-Indo-European (s)krewk-Every word from Proto-Germanic hrugjaz
Rücktrittsbremse — Etymology, Origin & Word History | Etymology Explorer