Where does “keihäänkaari” come from?

keihäänkaari (Finnish) comes from Finnish keihäs, from Proto-Finnic kaihas, from Proto-Germanic gaizaz, from Proto-Indo-European ǵʰoysós, from Proto-Indo-European ǵʰey- — winter.

Ancestry of “keihäänkaari”, step by step

keihäänkaari traces back through two separate lines of ancestry.

via Finnish keihäs

StepLanguageWordMeaning
1Finnishkeihässpear; javelin; pike
2Proto-Finnickaihasspear, javelin
3Proto-Germanicgaizazspear, pike, javelin
4Proto-Indo-Europeanǵʰoysósthrowing spear
5Proto-Indo-Europeanǵʰey-winter

via Finnish kaari

StepLanguageWordMeaning
1Finnishkaaricurve; bow; arch
2Proto-Finnickaaricurve
3Proto-Uralickëŋerecurved thing
Every word from Proto-Indo-European ǵʰey- →Every word from Proto-Indo-European ǵʰoysós →Every word from Proto-Germanic gaizaz →