Where does “kierretappi” come from?

kierretappi (Finnish) comes from Finnish kierre, from Finnish kiertää, from Proto-Finnic keertädäk, from Proto-Finnic keerä, from Proto-Uralic kerä.

kierretappi (Finnish): tap, screw tap, thread tap device used to cut an internal screw thread

Definitions

  1. tap, screw tap, thread tap device used to cut an internal screw thread

Ancestry of “kierretappi”, step by step

kierretappi traces back through two separate lines of ancestry.

via Finnish kierre

StepLanguageWordMeaning
1Finnishkierrethread; worm; helix; whirl, spiral
2Finnishkiertääto turn, twist, screw, rotate; to roll; to wind,...
3Proto-Finnickeertädäkto turn; to spin thread
4Proto-Finnickeerätwisted
5Proto-Uralickerä—

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
Every word from Proto-Uralic kerä →Every word from Proto-Finnic keerä →Every word from Proto-Finnic keertädäk →