Where does “hibernar” come from?

hibernar (Portuguese) comes from Latin hībernō, from Latin hībernus, from Proto-Indo-European ǵʰey- — winter.

hibernar (Portuguese): to hibernate

Definitions

Step	Language	Word	Meaning
1	Latin	hībernō	—
2	Latin	hībernus	—
3	Proto-Indo-European	ǵʰey-	winter

hibernar — Etymology, Origin & Word History | Etymology Explorer