Where does “rosopyöriäinen” come from?

rosopyöriäinen (Finnish) comes from Finnish pyöriäinen, from Finnish -iäinen, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

rosopyöriäinen (Finnish): finless porpoise, Neophocaena phocaenoides species of porpoise that lacks a true dorsal fin and is found in the coastal waters of Asia

Definitions

  1. finless porpoise, Neophocaena phocaenoides species of porpoise that lacks a true dorsal fin and is found in the coastal waters of Asia

Ancestry of “rosopyöriäinen”, step by step

rosopyöriäinen traces back through two separate lines of ancestry.

via Finnish pyöriäinen

StepLanguageWordMeaning
1Finnishpyöriäinenporpoise, harbour porpoise, Phocoena phocoena;...
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

via Finnish roso

StepLanguageWordMeaning
1FinnishrosoAny small uneven part or defect on a surface
Every word from Proto-Finnic -ucEvery word from Finnish -inenEvery word from Finnish -uus