Where does “sagrament” come from?

sagrament (Old French) comes from Latin sacrāmentum, from Latin sacrō, from Latin sacer, from Proto-Indo-European sh₂krós, from Proto-Indo-European seh₂k- — sacred.

Ancestry of “sagrament”, step by step

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

Words derived from “sagrament”

assermenter
serment
sairement
serement

Every word from Proto-Indo-European seh₂k- →

sagrament — Etymology, Origin & Word History | Etymology Explorer