| A | B |
|---|
| uncertain | not sure |
| uncommon | rare; not the usual; remarkable |
| unconscious | not within thought; not awake |
| undecided | not yet at the point of making a decision |
| unexpected | not what someone thought would happen; not predicted |
| unmistakable | clear; cannot be understood the wrong way; not able to be confused or misunderstood |
| unnecessary | not required |
| untidy | messy; not neat; not organized |
| unwise | not smart |
| unworthy | not deserving; not having any value |
| disadvantage | an unfavorable situation that is not good |
| disagreement | a quarrel; not able to come to an agreement; not of the same opinion |
| disappoint | to let someone down; to not make someone proud or satisfied |
| discontinue | to end something; to not use anymore; cease |
| dismal | not good; depressing; dreary; bleak |
| disobedient | not following the rules |
| disorganized | messy; not neat; not able to find things |
| disposable | not worthy of being kept; easily given or thrown away; able to be easily replaced |
| disrespectful | not polite; rude; not courteous |
| disturb | to bother or pester; not leaving someone alone |
