| digression | A temporary departure from the main subject in speech or writing | |
| dilatory | tending to delay or procrastinate; slow to act | |
| dilettante | A person who cultivates an area of interest, such as the arts, without real commitment or knowledge | |
| dilute | To make a liquid less concentrated by adding water or another solvent to it. | |
| dint | An impression or hollow in a surface | |
| discomfit | To make (someone) feel uneasy, embarrassed, or confused; to disconcert | |
| disconcert | To disturb the composure of; unsettle | |
| discrepancy | A lack of compatibility or similarity between two or more facts | |
| discrete | Individually separate and distinct | |
| discriminate | Recognize a distinction; differentiate. | |