Where does “ryömintävaihde” come from?

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

ryömintävaihde (Finnish): crawler gear, creeper gear

Definitions

crawler gear, creeper gear

Ancestry of “ryömintävaihde”, step by step

ryömintävaihde traces back through two separate lines of ancestry.

via Finnish vaihde

Step	Language	Word	Meaning
1	Finnish	vaihde	gear; switch; turn
2	Finnish	vaihtaa	to change, replace; to exchange, switch; to swap
3	Proto-Finnic	vaihtadak	to change
4	Proto-Finnic	-tadak	Forms verbs from both nominal and verbal stems
5	Proto-Uralic	-ta-	Forms verbs from nouns; Forms causative verbs...

via Finnish ryömintä

Step	Language	Word	Meaning
1	Finnish	ryömintä	creep, creeping
2	Finnish	-ntä	Front vowel variant of -nta; API
3	Proto-Finnic	-nta	Forms action nouns from verbs

Every word from Proto-Uralic -ta- →Every word from Proto-Finnic -tadak →Every word from Proto-Finnic vaihtadak →