either the right or left half of the body sign - v. to write one's name; n. a mark or shape used to mean something; evidence that something exists...
series - n. a number of similar things or events that follow one after another in time, position or order serious - ad. important; needing careful con...
sacrifice - v. to do without something or to suffer a loss for a belief, idea, goal or another person sad - ad. not happy safe - ad. away from harm or...
resource - n. anything of value that can be used or sold responsible - ad. having a duty or job to do ("He is responsible for preparing the repor...
rebel - v. to act against a government or power, often with force; to refuse to obey; n. one who opposes or fights against the government of his or he...
radar - n. a device that uses radio signals to learn the position or speed of objects that may be too far away to be seen radiation - n. waves of ener...
question - v. to ask; to express wonder or disbelief; n. a sentence or word used in asking for information; a problem; an issue to be discussed quick ...
prove - v. to show to be true provide - v. to give something needed or wanted public - ad. of or about all the people in a community or country; oppos...
economics or business politics - n. the activities of government and of those who are in public office pollute - v. to release dangerous or unpleasant...
pass - v. to go by or move around something; to move along; to cause or permit to go passenger - n. a person travelling by airplane, train, boat or ca...