Where does “syster” come from?

syster (Middle English) comes from Middle English suster, from Old English sweostor, from Proto-West Germanic *swester — sister.

syster (Middle English): Alternative form of suster

Definitions

  1. Alternative form of suster

Ancestry of “syster”, step by step

StepLanguageWordMeaning
1Middle EnglishsusterA sister or step-sister; a female sibling
2Old Englishsweostorsister
3Proto-West Germanic*swestersister
Every word from Proto-West Germanic *swester →
syster — Etymology, Origin & Word History | Etymology Explorer