Where does “otsalämpötila” come from?

otsalämpötila (Finnish) comes from Finnish lämpötila, from Finnish lämpö, from Finnish -o, from Proto-Finnic -o, from Proto-Uralic -w.

Ancestry of “otsalämpötila”, step by step

otsalämpötila traces back through two separate lines of ancestry.

via Finnish lämpötila

StepLanguageWordMeaning
1Finnishlämpötilatemperature
2Finnishlämpöwarmth, heat; heat; fever
3Finnish-oForms result or action nouns from verbs; Forms...
4Proto-Finnic-oForms action/result nouns from verbs
5Proto-Uralic-w—

via Finnish otsa

StepLanguageWordMeaning
1Finnishotsaforehead; audacity, nerve
2Proto-Germanicanþijąforehead
Every word from Proto-Uralic -w →Every word from Finnish -o →Every word from Proto-Finnic -o →