malicious
ma-li-cious
adjective
Intending to cause harm or distress to someone, often without provocation.
"He was found guilty of malicious damage."
Thesaurus
Synonyms: catty, venomed, cattish, spiteful, leering, beady-eyed, vicious, bitchy, malevolent, despiteful, vixenish, vindictive
Antonyms: unmalicious