1.Definition: (of persons or their actions) able or disposed to inflict pain or suffering

"Vicious kicks"

Related Adjective(s):barbarous, brutal, cruel, fell, roughshod, savage

2.Definition: bringing or deserving severe rebuke or censure

Related Adjective(s):condemnable, criminal, deplorable, reprehensible

3.Definition: having the nature of vice

Related Adjective(s):evil

4.Definition: marked by deep ill will; deliberately harmful

"Vicious gossip"

Related Adjective(s):poisonous, venomous