| unseen |
not seen, observed, or discovered; invisible; not noticed. |
| unsettled |
not fixed, stable, or constant; variable. [5 definitions] |
| unsightly |
not pleasant or agreeable to look at; ugly. |
| unstable |
likely to change suddenly. [2 definitions] |
| unsteady |
not stable or secure; not firm. [2 definitions] |
| unsuitable |
not proper or appropriate. |
| unsure |
not certain; having doubt. |
| untangle |
to free from a tangled or snarled condition. [2 definitions] |
| untie |
to free from being tied or bound. [3 definitions] |
| until |
up to the time when. [5 definitions] |
| untrue |
not correct or accurate; false. [2 definitions] |
| unusual |
not usual or ordinary; not common; remarkable. |
| unwell |
in poor health; sick; ill. |
| unwind |
to undo from a wound or twisted state; remove the twists from. [4 definitions] |
| up |
to, toward, at, or in a higher place or position. [23 definitions] |
| up- |
a prefix that means "up" or "upward." |
| upbringing |
the training and rearing of a child or children. |
| update |
new and more recent information about a particular thing, or a change in something that is made with the aim of improving it. [3 definitions] |
| up for grabs |
(informal) able to be taken by anyone; not yet decided. |
| upgrade |
an upward slope or incline. [2 definitions] |
| upheaval |
an act, instance, or condition of being raised or heaved upward. [2 definitions] |