Where does “pystyhiiri” come from?

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

pystyhiiri (Finnish): a vertical mouse#Noun a computer mouse which is used with the hand in a vertical position

Definitions

  1. a vertical mouse#Noun a computer mouse which is used with the hand in a vertical position

Ancestry of “pystyhiiri”, step by step

pystyhiiri traces back through two separate lines of ancestry.

via Finnish pysty

StepLanguageWordMeaning
1FinnishpystyIndicative present connegative form of pystyä;...
2Finnishpistääto poke, thrust; to stick, prick, stab, puncture;...
3Proto-Finnicpistädäkto poke, to thrust, to stab, to sting; to put, to...
4Proto-Finno-Permicpistä-—

via Finnish hiiri

StepLanguageWordMeaning
1FinnishhiiriA mouse, used rather indiscriminately for a...
2Proto-Finnichiirimouse
3Proto-Uralicšiŋeremouse
Every word from Proto-Finno-Permic pistä- →Every word from Proto-Finnic pistädäk →Every word from Finnish pistää →