| mercenary | A professional soldier hired to serve in a foreign army | |
| menial | Of or relating to low-level, humble or undemanding tasks | |
| mendicant | A beggar or religious follower who lives by asking people for money or food | |
| mendacity | Untruthfulness; tendency to lie | |
| meld | To blend or mix together to become a cohesive whole | |
| meddle | Interfere in or busy oneself unduly with something that is not one's concern | |
| mawkish | Excessively sentimental in a way that seems fake or insincere | |
| maudlin | Self-pityingly or tearfully sentimental, often through drunkenness | |
| marshal | An officer of the highest rank in the armed forces of some countries, including France | |
| marginal | Of secondary or lesser importance, rank, or scale; not central or major | |