Where does “täysiserkku” come from?

täysiserkku (Finnish) comes from Finnish täysi, from Proto-Finnic täüci, from Proto-Uralic täwde — full.

Ancestry of “täysiserkku”, step by step

täysiserkku traces back through two separate lines of ancestry.

via Finnish täysi

StepLanguageWordMeaning
1Finnishtäysifull
2Proto-Finnictäücifull
3Proto-Uralictäwdefull

via Finnish serkku

StepLanguageWordMeaning
1FinnishserkkuA first cousin
2Finnishseukku—
3Kareliansetä—
Every word from Proto-Uralic täwde →