What is the act of taking away from the reputation or good name of another; a lessening or cheapening in the estimation of others; the act of depreciating another, from envy or malice; calumny called?

detraction — The act of taking away from the reputation or good name of another; a lessening or cheapening in the estimation of others; the act of depreciating another, from envy or malice; calumny. (Webster's 1913.)