Where does “uppiniskaisuus” come from?

uppiniskaisuus (Finnish) comes from Finnish uppiniskainen, from Swedish uppstudsig, from Middle Low German upstutzig.

uppiniskaisuus (Finnish): stubbornness

Definitions

Step	Language	Word	Meaning
1	Finnish	uppiniskainen	stubborn, recalcitrant
2	Swedish	uppstudsig	—
3	Middle Low German	upstutzig	—

uppiniskaisuus — Etymology, Origin & Word History | Etymology Explorer