Where does “tappijyrsin” come from?

tappijyrsin (Finnish) comes from Finnish tappi, from Swedish tapp, from Swedish täppa, from Old Norse tapa, from Proto-Germanic tappōną — to tap.

Ancestry of “tappijyrsin”, step by step

tappijyrsin traces back through two separate lines of ancestry.

via Finnish tappi

StepLanguageWordMeaning
1Finnishtappipeg; tap, spigot; plug
2Swedishtappcone cell
3Swedishtäppato block or obstruct a passage, "e.g." a leak
4Old Norsetapato lose
5Proto-Germanictappōnąto tap

via Finnish jyrsin

StepLanguageWordMeaning
1Finnishjyrsinmilling machine; Synonym of jyrsinterä;...
2Finnish-inSuffix variant for the illative singular, see...
3Proto-Finno-Ugric*-in
4Proto-Uralic-ma
Every word from Proto-Germanic tappōnąEvery word from Old Norse tapaEvery word from Swedish täppa