Where does “tyhjäkäyntisäädin” come from?

tyhjäkäyntisäädin (Finnish) comes from Finnish tyhjäkäynti, from Finnish tyhjä, from Proto-Finnic tühjä, from Proto-Balto-Slavic tuskjas, from Proto-Indo-European tews-, from Proto-Indo-European tu- — to swell; bird-cry, shriek.

Ancestry of “tyhjäkäyntisäädin”, step by step

tyhjäkäyntisäädin traces back through two separate lines of ancestry.

via Finnish tyhjäkäynti

StepLanguageWordMeaning
1Finnishtyhjäkäyntiidling of an engine: state of running at a slow speed, or out of gear
2Finnishtyhjäempty; blank; void
3Proto-Finnictühjäempty
4Proto-Balto-Slavictuskjasempty
5Proto-Indo-Europeantews-to be empty; to drain; to be happy
6Proto-Indo-Europeantu-to swell; bird-cry, shriek

via Finnish säädin

StepLanguageWordMeaning
1Finnishsäädincontroller; remote control; regulator
2Finnish-inSuffix variant for the illative singular, see...
3Proto-Finno-Ugric*-in
4Proto-Uralic-ma
Every word from Proto-Indo-European tu-Every word from Proto-Indo-European tews-Every word from Proto-Balto-Slavic tuskjas