Where does “perhosreuma” come from?

perhosreuma (Finnish) comes from Finnish perhonen, from Finnish -nen, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

Ancestry of “perhosreuma”, step by step

perhosreuma traces back through two separate lines of ancestry.

via Finnish perhonen

StepLanguageWordMeaning
1Finnishperhoneninsect of the order Lepidoptera; butterfly, moth...
2Finnish-nenForms diminutives nouns or terms expressing...
3Finnish-inen-like, -ous, -y; -en; Creates adjectives from...
4Finnish-uusForms nouns from adjectives, expressing a quality
5Proto-Finnic-uc-ness, -hood

via Finnish reuma

StepLanguageWordMeaning
1Finnishreumarheumatism
2Swedishreuma
Every word from Proto-Finnic -ucEvery word from Finnish -inenEvery word from Finnish -uus