Where does “jelzők” come from?

jelzők (Hungarian) comes from Hungarian jelző, from Hungarian jelez, from Hungarian -ez, from Hungarian -é-, from Hungarian -d, from Middle Welsh -nt — 3rd person plural verb ending.

Ancestry of “jelzők”, step by step

Step	Language	Word	Meaning
1	Hungarian	jelző	present participle of jelez; signaling,...
2	Hungarian	jelez	to signify, to signal, to indicate
3	Hungarian	-ez	Appended to a noun to form a verb
4	Hungarian	-é-	—
5	Hungarian	-d	your; Used in the second-person singular definite...
6	Middle Welsh	-nt	3rd person plural verb ending

Every word from Middle Welsh -nt →Every word from Hungarian -d →Every word from Hungarian -ez →