malicious (adj.)youdaoicibaDictYouDict[malicious 词源字典]
early 13c., from Old French malicios "showing ill will, spiteful, wicked" (Modern French malicieux), from Latin malitiosus "wicked, malicious," from malitia "badness, ill will, spite," from malus "bad" (see mal-). In legal use (early 14c., Anglo-French), it means "characterized by malice prepense."[malicious etymology, malicious origin, 英语词源]