Where does “talpalj” come from?

talpalj (Hungarian) comes from Hungarian alj, from Hungarian ál, from Proto-Uralic ëla — below.

Ancestry of “talpalj”, step by step

Step	Language	Word	Meaning
1	Hungarian	alj	bottom, lower part; skirt
2	Hungarian	ál	false, fake, sham, phoney, make-believe, bogus,...
3	Proto-Uralic	ëla	below

talpalj — Etymology, Origin & Word History | Etymology Explorer