Where does “polttopinta” come from?

polttopinta (Finnish) comes from Finnish poltto, from Finnish polttaa, from Proto-Finnic polttadak, from Proto-Finnic paladak, from Proto-Uralic pala- — to devour, eat.

polttopinta (Finnish): caustic envelope of reflected or refracted rays

Definitions

  1. caustic envelope of reflected or refracted rays

Ancestry of “polttopinta”, step by step

polttopinta traces back through two separate lines of ancestry.

via Finnish poltto

StepLanguageWordMeaning
1Finnishpolttoburn, burning; burn; incineration
2Finnishpolttaato burn; to burn, sunburn; to burn, waste
3Proto-Finnicpolttadakto burn
4Proto-Finnicpaladakto burn, to be burning
5Proto-Uralicpala-to devour, eat

via Finnish pinta

StepLanguageWordMeaning
1Finnishpintasurface
2Proto-Finnicpintasurface; sapwood; fat
3Proto-Germanicspindazfat; lard; grease; smear; marrow
Every word from Proto-Uralic pala- →Every word from Proto-Finnic paladak →Every word from Proto-Finnic polttadak →