Where does “sister” come from?

sister (Middle English) comes from Old English sweoster, from Proto-Germanic swestēr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.

sister (Middle English): Alternative form of suster

Definitions

  1. Alternative form of suster

Ancestry of “sister”, step by step

sister traces back through 3 separate lines of ancestry.

via Old English sweoster

StepLanguageWordMeaning
1Old EnglishsweosterAlternative form of sweostor
2Proto-Germanicswestērsister
3Proto-Indo-Europeanswésōrsister
4Proto-Indo-Europeansu-h₁ésh₂-ōr
5Proto-Indo-Europeanh₁ésh₂r̥blood

via Middle English suster

StepLanguageWordMeaning
1Middle EnglishsusterA sister or step-sister; a female sibling
2Old Englishsweostorsister
3Proto-West Germanic*swestersister

via Old English swustor

StepLanguageWordMeaning
1Old Englishswustor
Every word from Proto-Indo-European h₁ésh₂r̥Every word from Proto-Indo-European su-h₁ésh₂-ōrEvery word from Proto-Indo-European swésōr
sister — Etymology, Origin & Word History | Etymology Explorer