Where does “kehitysluokka” come from?

kehitysluokka (Finnish) comes from Finnish luokka, from Finnish luokki, from Proto-Slavic lǫkъ, from Proto-Balto-Slavic *lankás, from Proto-Indo-European lenk- — to bend.

kehitysluokka (Finnish): development class

Definitions

development class

Ancestry of “kehitysluokka”, step by step

kehitysluokka traces back through two separate lines of ancestry.

via Finnish luokka

Step	Language	Word	Meaning
1	Finnish	luokka	class; class, social class; grade
2	Finnish	luokki	shaft bow
3	Proto-Slavic	lǫkъ	bow
4	Proto-Balto-Slavic	*lankás	bow
5	Proto-Indo-European	lenk-	to bend

via Finnish kehitys

Step	Language	Word	Meaning
1	Finnish	kehitys	development, improvement, advancement, evolution
2	Finnish	kehittää	to unravel, unwind; to develop, advance, improve;...
3	Finnish	kehitä	—
4	Finnish	-itä	Front vowel variant of -ita
5	Proto-Finnic	-it'ak	Forms verbs

Every word from Proto-Indo-European lenk- →Every word from Proto-Balto-Slavic *lankás →Every word from Proto-Slavic lǫkъ →