Where does “arvosana-asteikko” come from?

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

arvosana-asteikko (Finnish): grading scale

Definitions

grading scale

Ancestry of “arvosana-asteikko”, step by step

arvosana-asteikko traces back through two separate lines of ancestry.

via Finnish arvosana

Step	Language	Word	Meaning
1	Finnish	arvosana	A grade, score, rating
2	Finnish	sana	word; Word, Scripture; lesson
3	Finnish	luokka	class; class, social class; grade
4	Finnish	luokki	shaft bow
5	Proto-Slavic	lǫkъ	bow
6	Proto-Balto-Slavic	*lankás	bow
7	Proto-Indo-European	lenk-	to bend

via Finnish asteikko

Step	Language	Word	Meaning
1	Finnish	asteikko	scale
2	Finnish	-ikko	Forms nouns for groups of a particular number,...
3	Proto-Finnic	-ikko	Forms nouns indicating a group of things
4	Proto-Finnic	-i-	Plural number marker in other cases than the nominative (and optionally the genitive)

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