1. (

• barbarous ,
• brutal ,
• cruel ,
• fell ,
• roughshod ,
• savage ,
• vicious

) (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" ;

2. (

• evil ,
• vicious

) having the nature of vice ;

3. (

• condemnable ,
• criminal ,
• deplorable ,
• reprehensible ,
• vicious

) 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" ;

4. (

• poisonous ,
• venomous ,
• vicious

) marked by deep ill will; deliberately harmful; "poisonous hate"; "venomous criticism"; "vicious gossip" ;