Where does “viuhahtaminen” come from?

viuhahtaminen (Finnish) comes from Finnish viuhahtaa, from Finnish viuhua, from Finnish -ua, from Proto-Finnic -üdäk — Forms mainly passive or anticausative verbs.

Ancestry of “viuhahtaminen”, step by step

Step	Language	Word	Meaning
1	Finnish	viuhahtaa	to swoosh; to streak
2	Finnish	viuhua	to swoosh, to swish
3	Finnish	-ua	Forms stative or inchoative intransitive verbs...
4	Proto-Finnic	-üdäk	Forms mainly passive or anticausative verbs

Every word from Proto-Finnic -üdäk →Every word from Finnish -ua →Every word from Finnish viuhua →