Where does “stygnąć” come from?

stygnąć (Polish) comes from Old Polish stydnąć, from Proto-Slavic stỳdnǫti.

stygnąć (Polish): to cool, cool down

Definitions

Step	Language	Word	Meaning
1	Old Polish	stydnąć	to cool
2	Proto-Slavic	stỳdnǫti	—

stygnąć — Etymology, Origin & Word History | Etymology Explorer