Where does “sacerdotalis” come from?

sacerdotalis (Latin) comes from Latin sacerdōs, from Latin sacer, from Proto-Indo-European sh₂krós, from Proto-Indo-European seh₂k- — sacred.

Ancestry of “sacerdotalis”, step by step

Step	Language	Word	Meaning
1	Latin	sacerdōs	—
2	Latin	sacer	sacred, holy, dedicated , consecrated, hallowed;...
3	Proto-Indo-European	sh₂krós	sacred
4	Proto-Indo-European	seh₂k-	sacred

sacerdotalis — Etymology, Origin & Word History | Etymology Explorer