Where does “sisähammaspyörä” come from?

sisähammaspyörä (Finnish) comes from Finnish hammaspyörä, from Finnish hammas, from Proto-Finnic hambas, from Proto-Balto-Slavic źámbas, from Proto-Indo-European ǵómbʰos, from Proto-Indo-European ǵómbʰ- — to pierce, gnaw through; tooth, horn, peg.

sisähammaspyörä (Finnish): inner gear, inner cogwheel

Definitions

  1. inner gear, inner cogwheel

Ancestry of “sisähammaspyörä”, step by step

StepLanguageWordMeaning
1FinnishhammaspyöräA cogwheel, gearwheel
2Finnishhammastooth
3Proto-Finnichambastooth
4Proto-Balto-Slavicźámbastooth; sharp or jagged edge
5Proto-Indo-Europeanǵómbʰostooth; row of teeth; peg
6Proto-Indo-Europeanǵómbʰ-to pierce, gnaw through; tooth, horn, peg
Every word from Proto-Indo-European ǵómbʰ- →Every word from Proto-Indo-European ǵómbʰos →Every word from Proto-Balto-Slavic źámbas →