Where does “legmeddőbb” come from?

legmeddőbb (Hungarian) comes from Hungarian meddőbb, from Old Prussian meddo, from Proto-Balto-Slavic médu, from Proto-Indo-European médʰu — honey; honey wine, mead.

Ancestry of “legmeddőbb”, step by step

Step	Language	Word	Meaning
1	Hungarian	meddőbb	—
2	Old Prussian	meddo	honey
3	Proto-Balto-Slavic	médu	honey
4	Proto-Indo-European	médʰu	honey; honey wine, mead

Every word from Proto-Indo-European médʰu →Every word from Proto-Balto-Slavic médu →Every word from Old Prussian meddo →