Where does “legkoszosabb” come from?

legkoszosabb (Hungarian) comes from Hungarian koszosabb, from Hungarian koszos, from Hungarian kösz, from Hungarian köszönöm, from Hungarian -öm, from Hungarian -ö-, from Hungarian -d, from Middle Welsh -nt — 3rd person plural verb ending.

Ancestry of “legkoszosabb”, step by step

StepLanguageWordMeaning
1Hungariankoszosabb—
2Hungariankoszosdirty
3Hungarianköszthanks
4Hungarianköszönömfirst-person singular indicative present definite...
5Hungarian-ömUsed to form the first-person singular present...
6Hungarian-ö-linking vowel
7Hungarian-dyour; Used in the second-person singular definite...
8Middle Welsh-nt3rd person plural verb ending
Every word from Middle Welsh -nt →Every word from Hungarian -d →Every word from Hungarian -öm →