accuse

The word "accuse" entered English in the late 13th century from the Old French "acuser," meaning "to blame, condemn, or indict." The Old French term derived from the Latin "accusare," which translates to "to call to account, make a complaint against." This Latin verb is a compound of "ad-" (meaning "to" or "toward") and "causari" (meaning "to plead" or "to give as a reason"), from "causa" (meaning "reason, cause, or lawsuit"). The core logic of the word has remained remarkably consistent: from its Latin origins centered on the idea of bringing a formal cause or charge against someone, it evolved into the modern English sense of declaring that someone is responsible for a fault or crime.

The word is a simplex borrowing from Old French. It cannot be meaningfully segmented into productive morphemes in modern English spelling without resorting to reconstructed roots that are not direct substrings.