Where does “somras” come from?

somras (Swedish) comes from Swedish sommar, from Old Norse sumar, from Proto-Germanic sumaraz, from Proto-Indo-European sm̥m-aro-, from Proto-Indo-European sm̥-h₂-ó-, from Proto-Indo-European semh₂- — summer, year.

Ancestry of “somras”, step by step

StepLanguageWordMeaning
1Swedishsommara summer
2Old Norsesumarsummer
3Proto-Germanicsumarazsummer
4Proto-Indo-Europeansm̥m-aro-—
5Proto-Indo-Europeansm̥-h₂-ó-—
6Proto-Indo-Europeansemh₂-summer, year
Every word from Proto-Indo-European semh₂- →Every word from Proto-Indo-European sm̥-h₂-ó- →Every word from Proto-Indo-European sm̥m-aro- →