| 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 |
