constable Look up constable at Dictionary.com
c.1200, from O.Fr. conestable, principal officer of the Frankish king's household, from L.L. comes stabuli, lit. "count of the stable" (established by Theodosian Code, c.438 C.E.), hence, "chief groom." Probably a translation of a Gmc. word. Meaning "an officer of the peace" is from c.1600, transferred to "police officer" 1836.