Where does “pysty” come from?

pysty (Finnish) comes from Finnish pistää, from Proto-Finnic pistädäk, from Proto-Finno-Permic pistä-.

pysty (Finnish): Indicative present connegative form of pystyä;...

Definitions

Step	Language	Word	Meaning
1	Finnish	pistää	to poke, thrust; to stick, prick, stab, puncture;...
2	Proto-Finnic	pistädäk	to poke, to thrust, to stab, to sting; to put, to...
3	Proto-Finno-Permic	pistä-	—

pysty — Etymology, Origin & Word History | Etymology Explorer