constable
noun
[ ˈkʌnstəb(ə)l ]
• a police officer.
• the governor of a royal castle.
Origin:
Middle English (in constable (sense 2 of the noun)): from Old French conestable, from late Latin comes stabuli ‘count (head officer) of the stable’. constable (sense 1 of the noun) dates from the mid 19th century.