| unbecoming |
not attractive or proper on a particular person. [2 definitions] |
| unbelievable |
astounding or very hard to believe. |
| uncanny |
beyond ordinary human or natural means or ability. |
| uncertain |
not known for sure; not definite. [3 definitions] |
| uncle |
the brother or brother-in-law of one's father or mother. [2 definitions] |
| unclear |
hard to understand; confusing. [2 definitions] |
| Uncle Sam |
a cartoon person that represents the government or people of the United States. Uncle Sam is a tall, thin man with a beard, top hat, and trousers that have red and white stripes. [2 definitions] |
| uncomfortable |
feeling discomfort; not comfortable. [2 definitions] |
| uncommon |
unusual or rare. |
| unconscious |
not conscious or aware. [3 definitions] |
| unconstitutional |
not according to the constitution of a state or country. |
| uncooperative |
not willing to work together or cooperate. |
| uncover |
to remove the cover from. [2 definitions] |
| undaunted |
not discouraged; not giving up even though something is difficult or frightening. |
| undecided |
not yet decided or settled. [2 definitions] |
| under |
below; beneath. [15 definitions] |
| under- |
a prefix that means "below" or "beneath." [2 definitions] |
| underclothes |
clothing worn next to the skin under other clothing; underwear. |
| under cover |
hidden; in secret. |
| underdog |
a person or team that is expected to lose a contest in sports or politics. |
| undergo |
to have the experience of; receive; endure. |