Where does “kahdeskymmeneskahdes” come from?

kahdeskymmeneskahdes (Finnish) comes from Finnish kahdeskymmenes, from Finnish kahdes, from Finnish kaksi, from Proto-Finnic kakci, from Proto-Uralic *kakta.

Ancestry of “kahdeskymmeneskahdes”, step by step

StepLanguageWordMeaning
1Finnishkahdeskymmenestwentieth
2Finnishkahdessecond, two
3Finnishkaksitwo
4Proto-Finnickakcitwo
5Proto-Uralic*kakta
Every word from Proto-Uralic *kaktaEvery word from Proto-Finnic kakciEvery word from Finnish kaksi