Where does “puukottaminen” come from?

puukottaminen (Finnish) comes from Finnish puukottaa, from Finnish puukko, from Finnish puu, from Proto-Finnic puu, from Proto-Uralic puwe — tree, wood.

Ancestry of “puukottaminen”, step by step

Step	Language	Word	Meaning
1	Finnish	puukottaa	to stab; to knife; to stab or knife; to operate
2	Finnish	puukko	hunting knife, puukko
3	Finnish	puu	tree; wood
4	Proto-Finnic	puu	tree
5	Proto-Uralic	puwe	tree, wood

Every word from Proto-Uralic puwe →Every word from Proto-Finnic puu →Every word from Finnish puu →