Where does “vulgar” come from?

vulgar (Catalan) comes from Latin vulgāris, from Latin -āris, from Latin -ālis, from Proto-Italic -ālis.

vulgar (Catalan): vulgar

Definitions

Step	Language	Word	Meaning
1	Latin	vulgāris	—
2	Latin	-āris	—
3	Latin	-ālis	—
4	Proto-Italic	-ālis	—

vulgar — Etymology, Origin & Word History | Etymology Explorer