Where does “tanúbizonysága” come from?

tanúbizonysága (Hungarian) comes from Hungarian tanúbizonyság, from Hungarian bizonyság, from Hungarian bizony, from Hungarian bízik, from Hungarian -t, from Proto-Uralic -tt.

Ancestry of “tanúbizonysága”, step by step

Step	Language	Word	Meaning
1	Hungarian	tanúbizonyság	testimony
2	Hungarian	bizonyság	evidence, proof
3	Hungarian	bizony	indeed, certainly, surely; surely, definitely
4	Hungarian	bízik	to trust
5	Hungarian	-t	Used to form the accusative case; -ed, -t. Used...
6	Proto-Uralic	-tt	—

Every word from Proto-Uralic -tt →Every word from Hungarian -t →Every word from Hungarian bízik →