Where does “ristivaihto” come from?

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

Ancestry of “ristivaihto”, step by step

ristivaihto traces back through two separate lines of ancestry.

via Finnish vaihto

StepLanguageWordMeaning
1Finnishvaihtoexchange; swap; shift key
2Finnishvaihtaato change, replace; to exchange, switch; to swap
3Proto-Finnicvaihtadakto change
4Proto-Finnic-tadakForms verbs from both nominal and verbal stems
5Proto-Uralic-ta-Forms verbs from nouns; Forms causative verbs...

via Finnish Risti

StepLanguageWordMeaning
1FinnishRisticross
2Finnish-iäinenFront vowel variant of -iainen
3Finnish-inen-like, -ous, -y; -en; Creates adjectives from...
4Finnish-uusForms nouns from adjectives, expressing a quality
5Proto-Finnic-uc-ness, -hood
Every word from Proto-Uralic -ta- →Every word from Proto-Finnic -tadak →Every word from Proto-Finnic vaihtadak →