sacrilege

The word begins in Latin with sacer, meaning holy or set apart, and legere in an old legal sense tied to gathering or taking. From these came sacrilegus, a person who steals from a temple or violates what is sacred. Roman law treated the act as more than ordinary theft. The offense attacked divine order as well as property.

The noun sacrilegium was current in classical Latin for profanation of sacred things. In late Roman and Christian usage, the meaning widened from temple robbery to broader irreverence toward holy persons, places, and rites. Once the Church inherited the term, the moral field grew larger. The old legal charge became a spiritual one too.

Old French passed it on as sacrilege, and Middle English adopted that form. By the later Middle Ages, English writers used it for violation of sacred objects, then for outrages against religion more generally. The inherited French spelling stayed close to the Latin noun. The Roman charge kept its edge in Christian Europe.

Modern English still remembers both layers. Sacrilege can name desecration in a literal religious sense, but it is also used playfully for offenses against treasured customs, art, or food. That figurative use works only because the original word was so severe. A theft-word became an outrage-word.