vicious

adjectives

(of persons or their actions) able or disposed to inflict pain or suffering
"a barbarous crime"; "brutal beatings"; "cruel tortures"; "Stalin's roughshod treatment of the kulaks"; "a savage slap"; "vicious kicks"
barbarous, brutal, cruel, fell, roughshod, savage, vicious
is derived from
viciousness
having the nature of vice
evil, vicious
is derived from
viciousness
is derived from
vice
bringing or deserving severe rebuke or censure
"a criminal waste of talent"; "a deplorable act of violence"; "adultery is as reprehensible for a husband as for a wife"
condemnable, criminal, deplorable, reprehensible, vicious
marked by deep ill will; deliberately harmful
"poisonous hate"; "venomous criticism"; "vicious gossip"
poisonous, venomous, vicious
is derived from
viciousness