| unfit |
not suitable or appropriate for some purpose. [3 definitions] |
| unfold |
to open or spread out from a folded condition. [4 definitions] |
| unfortunate |
having bad luck; unlucky. [3 definitions] |
| unfortunately |
used to express that an event being talked about is something unlucky or something that turned out badly. |
| unfriendly |
not friendly; distant, unpleasant, or mean to other people. [2 definitions] |
| unhappy |
not glad or cheerful; sad; full of gloom. [2 definitions] |
| unhealthy |
in bad health; ill. [2 definitions] |
| unheard-of |
never before known or considered; completely new. |
| uni- |
a prefix that means "one" or "single." |
| unicorn |
a mythical animal having the body of a horse and a single, long horn extending from its forehead. |
| uniform |
always the same; never changing. [3 definitions] |
| uniform resource locator |
an address identifying the location of a file on the Internet, commonly called a URL. A URL consists of the computer on which the file is located and the file's location on that computer. |
| unify |
to make into a single unit or thing; bring together; unite. |
| unimportant |
not powerful or respected. [2 definitions] |
| uninhabited |
not lived in or inhabited. |
| uninterested |
having no interest; indifferent. |
| union |
the act of uniting. [6 definitions] |
| unique |
being the only one of its type; sole; single. [2 definitions] |
| unison |
(used with "in") speaking all at the same time, or singing at the same time in the same pitch. [2 definitions] |
| unit |
a single thing that is one of a group of similar things. [4 definitions] |
| unite |
to join together into a whole; combine. [3 definitions] |