Where does “ágyékcsigolyák” come from?

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

Ancestry of “ágyékcsigolyák”, step by step

StepLanguageWordMeaning
1Hungarian-k-s, -es; Denotes the first-person singular...
2Hungarian-ö-linking vowel
3Hungarian-dyour; Used in the second-person singular definite...
4Middle Welsh-nt3rd person plural verb ending
Every word from Middle Welsh -nt →Every word from Hungarian -k →Every word from Hungarian -d →