| Term | Definition |
| malignant | very dangerous,causing or threatening to cause death |
| malaise | uneasy or disturbed condition |
| malevolence | the wish evil may happens to others:ill will |
| malice | the wish evil may happens to others:ill will |
| malady | any bodily disorder or disease |
| maladjusted | not in a healthy relation with ones environment |
| benign | harmless; the least-harmful kind of tumor |
| malfunction | to function badly;work or perform improperly |
| malfeasance | misconduct by an official, such as a mayor |
| malnourished | poorly or improperly fed |
| malodorous | smelling bad |
| maltreat | to treat roughly or cruelly;abuse |
| malign | to speak evil of; slander; bad mouth |
| maladroit | unskillful; awkward; clumsy |
| malpractice | wrong treatment of a patient by a doctor |
| malapropism | ridiculous misuse of words |