Where does “styvsyster” come from?
styvsyster (Swedish) comes from Swedish syster, from Old Swedish systir, from Old Norse systir, from Proto-Norse ᛊᚹᛖᛊᛏᚨᚱ, from Proto-Germanic swestēr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
styvsyster (Swedish): a stepsister
Ancestry of “styvsyster”, step by step