Where does “Viitakoski” come from?

Viitakoski (Finnish) comes from Finnish viita, from Finnish -lä, from Finnish -as, from Proto-Finnic -s, from Proto-Finno-Ugric -s.

Ancestry of “Viitakoski”, step by step

Viitakoski traces back through two separate lines of ancestry.

via Finnish viita

StepLanguageWordMeaning
1FinnishviitaA thicket of young deciduous trees
2Finnish-läFront vowel variant of -la
3Finnish-asForms some adjectives; Forms some nouns
4Proto-Finnic-sForms nouns
5Proto-Finno-Ugric-s

via Finnish Koski

StepLanguageWordMeaning
1FinnishKoskiAny of a number of small places in Finland and Karelia
2Proto-Finnickoskia continuous series of relatively small...
3Proto-Uralickośke
Every word from Proto-Finno-Ugric -sEvery word from Finnish -läEvery word from Finnish -as