Where does “kopoghat” come from?

kopoghat (Hungarian) comes from Hungarian kopog, from Hungarian -ög, from Hungarian -ö-, from Hungarian -d, from Middle Welsh -nt — 3rd person plural verb ending.

Ancestry of “kopoghat”, step by step

Step	Language	Word	Meaning
1	Hungarian	kopog	to knock (on or at something)
2	Hungarian	-ög	Added to a stem - often an onomatopoeia - to form...
3	Hungarian	-ö-	linking vowel
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 -ög →