sister · nurse; by extension used to refer to any medical staff that is not a doctor (usually, but not necessarily, confined to female staff) · nurse; used as a title of address for nurses
köken: From Middle High German swëster, from Old High German swëster, from Proto-Germanic *swestēr. Compare Low German swester, Dutch zuster, English sister, Danish søster, Swedish syster.
köken: Inherited from Middle French soeur, from Old French suer (nominative), from Latin soror (cf. also the Old French oblique form seror from the Latin accusative sorōrem), from Proto-Italic *swezōr, ultimately from Proto-Indo-European *swésōr.
aile: âme sœur, avez-vous des frères et sœurs, belle-sœur, bonne sœur, petite sœur, quasi-sœur, république sœur
köken: From Old Danish systær, søstær, from Old Norse systir, from Proto-Norse ᛊᚹᛖᛊᛏᚨᚱ (swestar), from Proto-Germanic *swestēr, cognate with German Schwester and English sister (probably influenced by Old Norse). The Germanic noun goes back to Proto-Indo-European *swésōr (“sister”), cognate with Latin soror and Russian сестра́ (sestrá).