Where does “otsmikuluu” come from?
otsmikuluu (Estonian) comes from Estonian luu, from Proto-Finnic luu, from Proto-Uralic luwe, from Proto-Iranian *Hrawpācáh, from Proto-Indo-Iranian *Hrawpāćás.
otsmikuluu (Estonian): frontal bone
Ancestry of “otsmikuluu”, step by step