Where does “alapul” come from?

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

alapul (Hungarian): to be founded/based upon something; to rest on...

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

alapul — Etymology, Origin & Word History | Etymology Explorer