Where does “volgarissimo” come from?

volgarissimo (Italian) comes from Italian volgare, from Latin vulgāris, from Latin -āris, from Latin -ālis, from Proto-Italic -ālis — forms relational adjectives.

Ancestry of “volgarissimo”, step by step

Step	Language	Word	Meaning
1	Italian	volgare	common, popular; vulgar, coarse, sleazy;...
2	Latin	vulgāris	common, usual, commonly known
3	Latin	-āris	first conjugation
4	Latin	-ālis	—
5	Proto-Italic	-ālis	forms relational adjectives

Every word from Proto-Italic -ālis →Every word from Latin -ālis →Every word from Latin -āris →