Where does “leuankaari” come from?

leuankaari (Finnish) comes from Finnish kaari, from Proto-Finnic kaari, from Proto-Uralic këŋere — curved thing.

Ancestry of “leuankaari”, step by step

leuankaari traces back through two separate lines of ancestry.

via Finnish kaari

StepLanguageWordMeaning
1Finnishkaaricurve; bow; arch
2Proto-Finnickaaricurve
3Proto-Uralickëŋerecurved thing

via Finnish leuka

StepLanguageWordMeaning
1Finnishleukajaw; chin
2Proto-Finnicleukachin, jaw
3Proto-Balto-Slavicleukāglands in an animal's neck
Every word from Proto-Uralic këŋere →Every word from Proto-Finnic kaari →Every word from Finnish kaari →