Where does “ligatus” come from?

ligatus (Latin) comes from Latin ligō, from Proto-Indo-European leyǵ- — to bind, tie.

Ancestry of “ligatus”, step by step

Step	Language	Word	Meaning
1	Latin	ligō	—
2	Proto-Indo-European	leyǵ-	to bind, tie

ligatus — Etymology, Origin & Word History | Etymology Explorer