Where does “zajnál” come from?

zajnál (Hungarian) comes from Hungarian -nál, from Hungarian -l, from Proto-Uralic -l.

Ancestry of “zajnál”, step by step

Step	Language	Word	Meaning
1	Hungarian	-nál	at. Used to form the adessive case; Used to form...
2	Hungarian	-l	Appended to a noun, an adjective or less...
3	Proto-Uralic	-l	—