Where does “isosisko” come from?

isosisko (Finnish) comes from Finnish Sisko, 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.

isosisko (Finnish): big sister

Definitions

  1. big sister

Ancestry of “isosisko”, step by step

isosisko traces back through two separate lines of ancestry.

via Finnish Sisko

StepLanguageWordMeaning
1FinnishSiskosister
2Finnishsisarsister
3Proto-Finnicsesarsister
4Proto-Balto-Slavicswésōsister
5Proto-Indo-Europeanswésōrsister
6Proto-Indo-Europeansu-h₁ésh₂-ōr—
7Proto-Indo-Europeanh₁ésh₂r̥blood

via Finnish iso

StepLanguageWordMeaning
1Finnishisobig; large; great
2Finnishisäfather; Father
3Proto-Finnicicäfather
4Proto-Uralicićäfather
Every word from Proto-Indo-European h₁ésh₂r̥ →Every word from Proto-Indo-European su-h₁ésh₂-ōr →Every word from Proto-Indo-European swésōr →