Where does “polttolasi” come from?

polttolasi (Finnish) comes from Finnish lasi, from Swedish glas, from Old Swedish glas, from Middle Low German glas, from Old Saxon glas, from Proto-West Germanic glas, from Proto-Germanic glasą, from Proto-Indo-European ǵʰel- — to shine, glimmer, glow; to shimmer, gleam;...

polttolasi (Finnish): sunglass convex lens of glass for producing heat by converging the sun's rays into a focus

Definitions

  1. sunglass convex lens of glass for producing heat by converging the sun's rays into a focus

Ancestry of “polttolasi”, step by step

polttolasi traces back through two separate lines of ancestry.

via Finnish lasi

StepLanguageWordMeaning
1Finnishlasiglass; bells; ice
2Swedishglasglass
3Old Swedishglas—
4Middle Low Germanglasglass
5Old Saxonglasglass
6Proto-West Germanicglasglass
7Proto-Germanicglasąglass
8Proto-Indo-Europeanǵʰel-to shine, glimmer, glow; to shimmer, gleam;...

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
Every word from Proto-Indo-European ǵʰel- →Every word from Proto-Germanic glasą →Every word from Proto-West Germanic glas →