Where does “pikkuruikkuinen” come from?

pikkuruikkuinen (Finnish) comes from Finnish pikku, from Finnish pieni, from Proto-Finnic peeni — little, small; fine.

Ancestry of “pikkuruikkuinen”, step by step

StepLanguageWordMeaning
1Finnishpikkulittle, small; little old
2Finnishpienilittle, small; Third-person singular indicative...
3Proto-Finnicpeenilittle, small; fine
Every word from Proto-Finnic peeni