G2556@ κακός kakos kak-os' Apparently a primary word; worthless (intrinsically such; whereas G4190 properly refers to effects) that is (subjectively) depraved or (objectively) injurious: - bad evil harm ill noisome wicked.
G4189@ πονηρία ponēria pon-ay-ree'-ah From G4190; depravity that is (specifically) malice; plural (concretely) plots sins: - iniquity wickedness.
G4190@ πονηρός ponēros pon-ay-ros' From a derivative of G4192; hurtful that is evil (properly in effect or influence and thus differing from G2556 which refers rather to essential character as well as from G4550 which indicates degeneracy from original virtue); figuratively calamitous; also (passively) ill that is diseased; but especially (morally) culpable that is derelict6 vicious facinorous; neuter (singular) mischief malice or (plural) guilt; masculine (singular) the devil or (plural) sinners: - bad evil grievous harm lewd malicious wicked (-ness). See also G4191.
G4191@ πονηρότερος ponēroteros pon-ay-rot'-er-os Comparative of G4190; more evil: - more wicked.
G4550@ σαπρός sapros sap-ros' From G4595; rotten that is worthless (literally or morally): - bad corrupt. Compt. G4190.