Where does “alapból” come from?

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

alapból (Hungarian): elative singular of alap

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

alapból — Etymology, Origin & Word History | Etymology Explorer