Where does “kérdőjelez” come from?

kérdőjelez (Hungarian) comes from Hungarian kérdőjel, from Hungarian kérdő, from Hungarian kérd, from Hungarian -d, from Middle Welsh -nt — 3rd person plural verb ending.

Ancestry of “kérdőjelez”, step by step

Step	Language	Word	Meaning
1	Hungarian	kérdőjel	question mark
2	Hungarian	kérdő	present participle of kérd; questioning;...
3	Hungarian	kérd	to ask, question; second-person singular...
4	Hungarian	-d	your; Used in the second-person singular definite...
5	Middle Welsh	-nt	3rd person plural verb ending

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