There are many words for evil that start with "m," but some of the most common include:
- Malevolent: This word describes something that is wishing or intending harm to others.
- Malicious: This word describes something that is done with the intention of causing harm.
- Malignant: This word describes something that is harmful and tending to become worse.
- Mischief: This word describes a playful or mischievous act that may or may not be intended to cause harm.
- Murderous: This word describes something that is related to or capable of murder.
These are just a few examples of words for evil that start with "m." The specific word you choose will depend on the context of your writing or conversation.