|Origin:||vicieux, from Latin vitiosus 'full of faults', from vitium; VICE|
violent and cruel in a way that hurts someone physically:
a vicious murder
a vicious killer
Keep away from that dog, he can be vicious.
very unkind in a way that is intended to hurt someone's feelings or make their character seem bad [= malicious]:
Sarah can be quite vicious at times.
a vicious personal attack on the Duchess
She was shocked by the vicious tone in his voice.
unpleasantly strong or severe [= violent]:
a vicious gust of wind
a vicious headache
He twisted her arm viciously.
—viciousness noun [uncountable]