Ma'anar ƙamus na kalmar "abetter" (wanda kuma aka rubuta "mafi kyau") shine mutumin da yake ƙarfafawa, ƙaddamarwa, ko taimakawa wajen aikata laifi ko wani laifi. A cikin mahallin shari'a, mai cin zarafi shine wanda ke taimakawa ko tallafa wa wani wajen aikata laifi, koda kuwa ba su shiga cikin aikata laifin da kansa ba. Ana amfani da kalmar “abettor” tare da kalmar shari’a mai alaƙa “kayan aiki,” wanda ke nufin wanda ke taimakawa ko baiwa mutumin da ya riga ya aikata laifi damar gujewa gano ko hukunta shi.