Where does “legfakultatívabb” come from?

legfakultatívabb (Hungarian) comes from Hungarian fakultatívabb, from Hungarian fakultatív, from German fakultativ, from French facultatif, from French -if, from Middle French -if, from Old French -if, from Latin -īvus — Creates adjectives from verb stems.

Ancestry of “legfakultatívabb”, step by step

StepLanguageWordMeaning
1Hungarianfakultatívabb
2Hungarianfakultatívoptional, elective, discretionary, facultative,...
3Germanfakultativoptional, facultative
4Frenchfacultatifoptional, elective; not mandatory; facultative
5French-if-ive; used in forming adjectives denoting...
6Middle French-if-ive
7Old French-if-ive
8Latin-īvusAdjective suffix
9Proto-Indo-European-iHwós
10Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wósEvery word from Latin -īvusEvery word from French -if