Where does “vicio” come from?

vicio (Ido) comes from Italian vizio, from Latin vitium, from Proto-Indo-European wi-tio-, from Proto-Indo-European wei — guilt, vice, fault.

vicio (Ido): vice: fault of character

Definitions

Step	Language	Word	Meaning
1	Italian	vizio	vice; bad habit; flaw, defect
2	Latin	vitium	flaw, defect, blemish, error, fault; vice; crime
3	Proto-Indo-European	wi-tio-	—
4	Proto-Indo-European	wei	guilt, vice, fault