Where does “isosisar” come from?

isosisar (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.

Ancestry of “isosisar”, step by step

isosisar traces back through two separate lines of ancestry.

via Finnish sisar

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

via Finnish iso

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