| Vocabulary Words | Meanings |
|---|---|
| ubiquitous | existing everywhere, omnipresent |
| ugly | not pretty or pleasant to look at |
| ulcer | an open sore on the skin or inside you |
| ultimatum | the last offer, Final warning |
| umbrella | a round piece of material stretched over thin pieces of metal. It can be opened and held over your head to keep you from getting wet in the rain |
| umpire | someone who settles arguments and decides whether players have broken the rules in games like cricket and tennis |
| uncle | the brother of your mother or father |
| uncomfortable | not at ease; feeling awkward |
| underground | underneath the ground. The same word also means a railway that runs in a tunnel under the ground |
| underline | to draw a line under a word |
| underneath | in a lower place; under something |
| understand | to know what something means |
| undo | to unfasten, untie or open something |
| undone | unfastened; opened |
| undress | to take your clothes off |
| unexpected | not expected; sudden |
| unhappy | not happy; sad |
| unhealthy | not healthy, sickly |
| unicorn an | imaginary animal that looks like a horse with a horn in the middle of its forehead |
| uniform | special clothes worn by those who belong to a group of people such as the army, the navy, or a school |
| unify | to form into one |
| unimportant | not important |
| uninteresting | not interesting |
| union | a joining together. The same word also means a group of workers who have joined together |
| union jack | the national flag of the United Kingdom |
| unit | a single thing |
| unite | to join together, to do something together as a group |
| universal | to do with everyone, everywhere |
| unkind | not kind; cruel |
| unless | if not; if you do not |
| unlike | not like; different |
| unload | to take a load from; to take the bullets out of a gun |
| unpleasant | not pleasant; nasty |
| unsteady | not steady; shaky |
| unsuccessful | not successful; not able to do something you try to do |
| untidy | not neat; not well arranged |
| until | up to the time. You are not allowed to drive a car until you are old enough |
| unusual | not usual; out of the ordinary |
| unwarp | to take the covering off something |
| unwell | ill; not healthy |
| up | towards a higher place; the opposite of down |
| upon | on top of something |
| uppercut | an upward blow used by a boxer |
| uppermost | highest in place, rank or power |
| uproar | a noisy disturbance; shouting and yelling |
| upset | to knock something over. The same word also means to be worried or ill |
| upside-down | turned over, with the top part underneath |
| upstairs | on a floor above the ground floor of a building |
| upstream | towards the upper part of a stream |
| upward | going up |
Non-defining relative clause
Non-defining relative clauses are placed after nouns which are definite already.
The adjective clause which does not define the noun before it but gives additional information about the noun is called the non-defining relative clause.