Where does “vuorokausivaihtelu” come from?

vuorokausivaihtelu (Finnish) comes from Finnish vaihtelu, from Finnish vaihdella, from Finnish vaihtaa, from Proto-Finnic vaihtadak, from Proto-Finnic -tadak, from Proto-Uralic -ta- — Forms verbs from nouns; Forms causative verbs...

vuorokausivaihtelu (Finnish): daily fluctuation, daily variation; diurnal fluctuation, diurnal variation

Definitions

  1. daily fluctuation, daily variation; diurnal fluctuation, diurnal variation

Ancestry of “vuorokausivaihtelu”, step by step

vuorokausivaihtelu traces back through two separate lines of ancestry.

via Finnish vaihtelu

StepLanguageWordMeaning
1Finnishvaihteluvariation; fluctuation
2FinnishvaihdellaTo change repeatedly; To vary; To fluctuate
3Finnishvaihtaato change, replace; to exchange, switch; to swap
4Proto-Finnicvaihtadakto change
5Proto-Finnic-tadakForms verbs from both nominal and verbal stems
6Proto-Uralic-ta-Forms verbs from nouns; Forms causative verbs...

via Finnish vuorokausi

StepLanguageWordMeaning
1Finnishvuorokausiday
2Finnishkausiperiod, age, epoch, season; term; period
3Proto-Finnickauci(section of a) road, way, path; part of a journey
4Proto-Finno-Permickawteroad? way? passage ?
Every word from Proto-Uralic -ta-Every word from Proto-Finnic -tadakEvery word from Proto-Finnic vaihtadak