Where does “bízz” come from?

bízz (Hungarian) comes from Hungarian bízik, from Hungarian -t, from Proto-Uralic -tt.

Ancestry of “bízz”, step by step

Step	Language	Word	Meaning
1	Hungarian	bízik	to trust
2	Hungarian	-t	Used to form the accusative case; -ed, -t. Used...
3	Proto-Uralic	-tt	—