Where does “vernünk” come from?

vernünk (Hungarian) comes from Hungarian -nünk, from Hungarian -ünk, from Proto-Uralic -mVk — our one possession.

Ancestry of “vernünk”, step by step

Step	Language	Word	Meaning
1	Hungarian	-nünk	Used to form the first-person plural of an...
2	Hungarian	-ünk	Used to form the first-person plural present...
3	Proto-Uralic	-mVk	our one possession