| Term | Definition |
| Discontinue | to end something; to not use anymore; cease |
| Disturb | to bother or pester; not leaving someone alone |
| Disorganized | messy; not neat |
| Disrespect | to show a lack of respect; to be rude |
| Disagreement | a quarrel; not able to come to an agreement; not of the same opinion |
| Disadvantage | an unfavorable situation that is not good |
| Disposable | not worthy of being kept; easily given or thrown away |
| Disappoint | fail to meet the hopes or expectations of |
| Dismal | depressing in character or appearance |
| Disservice | an act intended to help that turns out badly |