Where does “sisarellinen” come from?
sisarellinen (Finnish) comes from Finnish sisar, from Proto-Finnic sesar, from Proto-Balto-Slavic swésō, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
sisarellinen (Finnish): sisterly, sororal
Ancestry of “sisarellinen”, step by step