Where does “jäykkäniskainen” come from?

jäykkäniskainen (Finnish) comes from Finnish jäykkäniska, from Finnish niska, from Finnish -lä, from Finnish -as, from Proto-Finnic -s, from Proto-Finno-Ugric -s.

jäykkäniskainen (Finnish): stiff-necked

Definitions

stiff-necked

Ancestry of “jäykkäniskainen”, step by step

Step	Language	Word	Meaning
1	Finnish	jäykkäniska	stiff-necked person
2	Finnish	niska	nape, the back of the neck; a load bearing...
3	Finnish	-lä	Front vowel variant of -la
4	Finnish	-as	Forms some adjectives; Forms some nouns
5	Proto-Finnic	-s	Forms nouns
6	Proto-Finno-Ugric	-s	—

Every word from Proto-Finno-Ugric -s →Every word from Finnish -lä →Every word from Finnish -as →