Where does “alapja” come from?

alapja (Hungarian) comes from Hungarian alap, from Hungarian ál, from Proto-Uralic ëla — below.

alapja (Hungarian): third-person singular single-possession...

Definitions

Step	Language	Word	Meaning
1	Hungarian	alap	base, foundation
2	Hungarian	ál	false, fake, sham, phoney, make-believe, bogus,...
3	Proto-Uralic	ëla	below

alapja — Etymology, Origin & Word History | Etymology Explorer