a person who knowingly helps another in a crime or wrongdoing, often as a subordinate.
Origin: 1475–85; a(c) of unclear orig. + late Middle English complice < Middle French < Medieval Latin complici- (stem of complex) partner; see complex
late 15c., from O.Fr. complice "a confederate," with a parasitic a- on model of accomplish, etc., or assimilation of indefinite article in phrase a complice, from L.L. complicem (nom. complex) "partner, confederate," from L. complicare "fold together" (see complicate).