Where does “borghesissimo” come from?

borghesissimo (Italian) comes from Italian borghese, from Late Latin burgus, from Frankish burg, from Proto-Germanic burgz, from Proto-Indo-European bʰr̥ǵʰ-.

Ancestry of “borghesissimo”, step by step

Step	Language	Word	Meaning
1	Italian	borghese	middle-class, bourgeois; civilian; middle-class...
2	Late Latin	burgus	fortified town
3	Frankish	burg	fortress; town; fortified city
4	Proto-Germanic	burgz	fortification, stronghold; city
5	Proto-Indo-European	bʰr̥ǵʰ-	—

Every word from Proto-Indo-European bʰr̥ǵʰ- →Every word from Proto-Germanic burgz →Every word from Frankish burg →