13 usual --adj. as is normal or common; as is most often done, seen or heard
10 urgent --adj. needing an immediate decision or action
8 up --adv. to, in or at a higher position or value
6 unless – -conj. except if it happens; on condition that (“I will not go, unless the rain stops.”)
7 until – -conj. up to a time; before
5 university -n. a place of education that usually includes several colleges and research organizations
4 universe -n. all of space, including planets and stars
1 under -prep. below; below the surface of; less than; as called for by a law, agreement or system (“The river flows under the bridge.” “Such action is not permitted under the law.”)
11 us -pron. the form of the word “we” used after a preposition (“He said he would write to us.”) or used as an object of a verb (“They saw us yesterday.”)
9 urge -v. to advise strongly; to make a great effort to get someone to do something
12 use -v. to employ for a purpose; to put into action
3 unite -v. to join together
2 understand -v. to know what is meant; to have knowledge of
01 sabotage v. to damage or destroy as an act against an organization or nation 02 sacrifice v. to do without something or to suffer a loss for a belief, idea, goal or another person 03 sad adj. not happy 04 safe adj. away from harm or danger 05 sail v. to travel by boat or ship 06 sailor n. a person involved in sailing a boat or ship 07 salt n. a white substance found in sea water and in the ground, used to affect the taste of food 08 same adj. not different; not changed; like another or others 09 sand n. extremely small pieces of crushed rock found in large amounts in deserts and on coasts 10 satellite n. a small object in space that moves around a larger object; an object placed in orbit around the earth
