Where does “unsister” come from?

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

unsister (English): To separate, as sisters; to disjoin

Definitions

  1. To separate, as sisters; to disjoin

Ancestry of “unsister”, step by step

unsister traces back through two separate lines of ancestry.

via English sister

StepLanguageWordMeaning
1EnglishsisterA daughter of the same parents as another person;...
2Middle EnglishsusterA sister or step-sister; a female sibling
3Old Englishsweostorsister
4Proto-West Germanic*swestersister

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-West Germanic *swesterEvery word from Old English sweostorEvery word from Middle English suster
unsister — Etymology, Origin & Word History | Etymology Explorer