Where does “kovaluontoinen” come from?

kovaluontoinen (Finnish) comes from Finnish luontoinen, from Finnish luonto, from Finnish luoda, from Proto-Finnic löödäk, from Proto-Finno-Ugric lewe- — to throw, shoot.

Ancestry of “kovaluontoinen”, step by step

kovaluontoinen traces back through two separate lines of ancestry.

via Finnish luontoinen

StepLanguageWordMeaning
1FinnishluontoinenHaving a specified type of nature (natural environment) usually translated as with... nature, not necessarily as an adjective
2Finnishluontonature, environment; characteristics of a person
3Finnishluodato create; to shovel; to shed
4Proto-Finniclöödäkto hit, to strike; to beat
5Proto-Finno-Ugriclewe-to throw, shoot

via Finnish kova

StepLanguageWordMeaning
1Finnishkovahard; strict, harsh, severe, unfriendly, hard,...
2Proto-Finnickovahard
Every word from Proto-Finno-Ugric lewe-Every word from Proto-Finnic löödäkEvery word from Finnish luoda