Where does “kauppasalaisuus” come from?

kauppasalaisuus (Finnish) comes from Finnish salaisuus, from Finnish salainen, from Finnish sala, from Proto-Finno-Ugric *sala, from Proto-Uralic śala — elm.

Ancestry of “kauppasalaisuus”, step by step

kauppasalaisuus traces back through two separate lines of ancestry.

via Finnish salaisuus

StepLanguageWordMeaning
1Finnishsalaisuussecret
2Finnishsalainensecret, clandestine; arcane
3FinnishsalaA secret
4Proto-Finno-Ugric*sala—
5Proto-Uralicśalaelm

via Finnish kauppa

StepLanguageWordMeaning
1Finnishkauppacommerce, business, trade; traffic; buying and...
2Proto-Germanickaupazpurchase
3LatincaupoTradesman; Innkeeper, shopkeeper
4Proto-Indo-Europeankaup-—
Every word from Proto-Uralic śala →Every word from Proto-Finno-Ugric *sala →Every word from Finnish sala →