Where does “lukkokehys” come from?

lukkokehys (Finnish) comes from Finnish kehys, from Finnish kehä, from Proto-Finnic kehä, from Proto-Finnic keššä, from Proto-Finno-Ugric keččä.

Ancestry of “lukkokehys”, step by step

lukkokehys traces back through two separate lines of ancestry.

via Finnish kehys

StepLanguageWordMeaning
1Finnishkehysframe; cadre
2Finnishkehäcircle, ring; halo; circle, circumference
3Proto-Finnickehäcircle, ring
4Proto-Finnickeššä—
5Proto-Finno-Ugrickeččä—

via Finnish lukko

StepLanguageWordMeaning
1Finnishlukkolock; bolt; clasp
2Proto-Germaniclukǭlock, clasp, shutter, opening
3Proto-Indo-Europeanlewg-to bend
Every word from Proto-Finno-Ugric keččä →Every word from Proto-Finnic keššä →Every word from Proto-Finnic kehä →
lukkokehys — Etymology, Origin & Word History | Etymology Explorer