Where does “Schwöschterli” come from?

Schwöschterli (Alemannic German) comes from Alemannic German Schwöschter, from Middle High German swëster, from Old High German swester, from Proto-West Germanic *swester — sister.

Ancestry of “Schwöschterli”, step by step

StepLanguageWordMeaning
1Alemannic GermanSchwöschtersister
2Middle High Germanswëster
3Old High Germanswestersister
4Proto-West Germanic*swestersister
Every word from Proto-West Germanic *swester