Where does “viideskymmeneskahdes” come from?

viideskymmeneskahdes (Finnish) comes from Finnish viideskymmenes, from Finnish viides, from Proto-Finnic viidenci, from Proto-Finnic viici, from Proto-Uralic witte — five; ten.

Ancestry of “viideskymmeneskahdes”, step by step

viideskymmeneskahdes traces back through two separate lines of ancestry.

via Finnish viideskymmenes

StepLanguageWordMeaning
1Finnishviideskymmenesfiftieth
2Finnishviidesfifth
3Proto-Finnicviidencififth
4Proto-Finnicviicifive
5Proto-Uralicwittefive; ten

via Finnish kahdes

StepLanguageWordMeaning
1Finnishkahdessecond, two
2Finnishkaksitwo
3Proto-Finnickakcitwo
4Proto-Uralic*kakta
Every word from Proto-Uralic witteEvery word from Proto-Finnic viiciEvery word from Proto-Finnic viidenci