| A | B |
| Dismal | Depressing; causing gloom or bad feelings |
| Malady | Bad health; illness; sickness |
| Malaria | Bad air; a disease usually spread by mosquitoes |
| Malefactor | An evildoer; a person who does bad things |
| Malfeasance | Wrongdoing or bad conduct by a public official |
| Malice | Mischief; evil intent; bad will |
| Malignant | Harmful; something bad enough that could result in death |
| Malnourished | Having bad health or having poor nutrition |
| Malevolent | A word describes a person who wishes bad things would happen to others |
| Malodorous | Bad smell; stinky |