Where does “kisko” come from?

kisko (Finnish) comes from Finnish kiskoa, from Proto-Finnic kiskoidak — to pull, to wrench, to tear.

kisko (Finnish): bar; rail

Definitions

Step	Language	Word	Meaning
1	Finnish	kiskoa	to pull, wrench, tug, tear; to drag, lug, haul; ~...
2	Proto-Finnic	kiskoidak	to pull, to wrench, to tear

kisko — Etymology, Origin & Word History | Etymology Explorer