Where does “keményedő” come from?

keményedő (Hungarian) comes from Hungarian keményedik, from Hungarian -edik, from Hungarian -ed, from Hungarian -é-, from Hungarian -d, from Middle Welsh -nt — 3rd person plural verb ending.

Ancestry of “keményedő”, step by step

Step	Language	Word	Meaning
1	Hungarian	keményedik	to harden
2	Hungarian	-edik	Added to a noun, adjective, or verb to form a...
3	Hungarian	-ed	your; Used to form the definite second-person...
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 -ed →