cop

The modern informal term for a police officer, "cop," has a surprisingly direct lineage from the Latin verb "capere," meaning to take, seize, or capture. This Latin root entered Northern English dialect via Old French, giving rise to the verb "to cop" in the 18th century, which meant to catch or snatch. By the mid-19th century, this verb was applied to the act of arresting someone, leading to the agent noun "copper," meaning one who makes captures or arrests. The shortened form "cop" emerged as a natural slang abbreviation, succinctly capturing the core function of law enforcement from the perspective of the street.

The word is a simplex. It is a clipping and alteration of the earlier verb "to cop," meaning to seize or catch, which itself derives from the Latin "capere," meaning to take.