Where does “petunnyljin” come from?

petunnyljin (Finnish) comes from Finnish pettu, from Finnish petäjä, from Proto-Finnic petägä, from Proto-Uralic pečä — pine.

Ancestry of “petunnyljin”, step by step

petunnyljin traces back through two separate lines of ancestry.

via Finnish pettu

StepLanguageWordMeaning
1Finnishpettuphloem of a pine
2Finnishpetäjäpine; a large, lone pine tree
3Proto-Finnicpetägäpine
4Proto-Uralicpečäpine

via Finnish nyljin

StepLanguageWordMeaning
1Finnishnyljintool for flaying or skinning
2Finnish-inSuffix variant for the illative singular, see...
3Proto-Finno-Ugric*-in
4Proto-Uralic-ma
Every word from Proto-Uralic pečäEvery word from Proto-Finnic petägäEvery word from Finnish petäjä