| Term | Definition |
| milieu | The physical or social setting where something is formed or occurs; environment |
| misanthrope | A person who despises or distrusts mankind |
| misnomer | An error in identifying a person or place |
| missive | A written note or letter |
| mitigate | To make less severe |
| modicum | A small portion; limited quantity |
| mollify | A soothe in temper or emotions |
| mordant | Biting or sarcastic in manner or style |
| mores | Fixed, standard customs or manners; moral attitudes |
| morose | Dour; sullen |
| mote | A small particle or speck |
| mutability | The characteristic of being capable of change; open or exposed to change |
| myopic | Lacking foresight; having a narrow view or perspective |
| nebulous | Vague; unspecific or undefined |
| necromancy | The practice of communicating with the deceased in order to forsee the future |