字头Q
quality - n. that which something is known to have or be ("An important quality of steel is its strength."); amount of value or excellence ("Their goods are of the highest quality.")

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 - ad. fast

quiet - ad. with little or no noise; having little or no movement; calm

字头R
race - v. to run; to take part in a competition to decide who or what can move fastest; to take part in a campaign for political office; n. one of the major groups that humans can be divided into because of a common physical similarity, such as skin color

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 energy from something that produces heat or light; energy from a nuclear substance, which can be dangerous

radio - n. the system of sending and receiving signals or sounds through the air without wires

raid - v. to make a sudden attack; n. a sudden attack carried out as an act of war, or for the purpose of seizing or stealing something

railroad - n. a road for trains; a company that operates such a road and its stations and equipment

rain - n. water falling from the sky

raise - v. to lift up; to move to a higher position; to cause to grow; to increase

rare - ad. not common; not usual; not often

rate - n. speed; a measure of how quickly or how often something happens; the rice of any thing or service that is bought or sold

reach - v. to put a hand toward; to arrive at; to come to

react - v. to act as a result of or in answer to

read - v. to look at and understand the meaning of written words or numbers

ready - ad. prepared; completed; organized; willing

real - ad. true; truly existing; not false

realistic - ad. in agreement with the way things are

reason - n. the cause for a belief or act; purpose; something that explains

reasonable - ad. ready to listen to reasons or ideas; not extreme; ready or willing to compromise

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 her country

receive - v. to get or accept something given, offered or sent

recent - ad. a short time ago

recession - n. a temporary reduction in economic activity, when industries produce less and many workers lose their jobs

recognize - v. to know or remember something or someone that was known, known about or seen before; to accept another nation as independent and establish diplomatic ties with its government

record - v. to write something in order to have it for future use; to put sound or pictures in a form that can be kept and heard or seen again; n. a writing that shows proof or facts about something

recover - v. to get again something that was lost, stolen or taken away ("The police recovered the stolen money."); to return to normal health or normal conditions ("She is expected to recover from the operation.")

red - ad. having the color like that of blood

reduce - v. to make less or smaller in number, size or amount; to cut

reform - v. to make better by changing; to improve; n. a change to a better condition

refugee - n. a person who has been forced to flee because of unjust treatment, danger or war

refuse - v. to reject; to not accept, give or do something

regret - n. a feeling of sadness or sorrow about something that is done or that happens

reject - v. to refuse to accept, use or believe

relations - n. understandings or ties between nations; members of the same family; people connected by marriage or family ties

release - v. to free; to permit to go; to permit to be known or made public

religion - n. a belief in, or the honoring of, a god or gods

remain - v. to stay in a place after others leave; to stay the same

remains - n. a dead body

remember - v. to think about the past; opposite forget

remove - v. to take away or take off; to put an end to; to take out of a position or office

repair - n. work done to fix something

repeat - v. to say or do again

report - v. to tell about; to give the results of a study or investigation; n. the story about an event; the results of a study or investigation; a statement in which the facts may not be confirmed

represent - v. to act in the place of someone else; to substitute for; to serve as an example

repress - v. to control or to restrict freedoms by force

request - v. to ask for; n. the act of asking for

require - v. to need or demand as necessary

rescue - v. to free from danger or evil

research - n. a careful study to discover correct information

resign - v. to leave a position, job or office

resist - v. to oppose; to fight to prevent

resolution - n. an official statement of agreement by a group of people, usually reached by voting

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 report."); being the cause of ("They were responsible for the accident.")

rest - v. to sit, lie down or sleep to regain strength; n. that which remains; the others

restrain - v. to keep controlled; to limit action by a person or group

restrict - v. to limit; to prevent from increasing or becoming larger

result - v. to happen from a cause; n. that which follows or is produced by a cause; effect

retire - v. to leave a job or position because one is old or in poor health

return - v. to go or come back; to bring, give, take or send back

revolt - v. to protest violently; to fight for a change, especially of government

rice - n. a food grain

rich - ad. having much money or goods; having plenty of something

ride - v. to sit on or in and be carried along; to travel by animal, wheeled vehicle, airplane or boat

right - n. what a person legally and morally should be able to do or have ("It is their right to vote."); ad. agreeing with the facts; good; correct; opposite wrong; on the side that is toward the east when one is facing north; opposite left

riot - v. to act with many others in a violent way in a public place; n. a violent action by a large group of people

rise - v. to go up; to go higher; to increase; to go from a position of sitting or lying to a position of standing

risk - n. the chance of loss, damage or injury

river - n. a large amount of water that flows across land into another river, a lake or an ocean

road - n. a long piece of hard ground built between two places so people can walk, drive or ride easily from one place to the other

rob - v. to take money or property secretly or by force; to steal

rock - n. a hard piece of mineral matter

rocket - n. a device shaped like a tube that moves through air or space by burning gases and letting them escape from the back or bottom, sometimes used as a weapon

roll - v. to turn over and over; to move like a ball

room - n. a separate area within a building with its own walls

root - n. the part of a plant that is under the ground and takes nutrients from the soil

rope - n. a long, thick piece of material made from thinner pieces of material, used for tying

rough - ad. not flat or smooth; having an uneven surface; violent; not made well

round - ad. having the shape of a ball or circle

rub - v. to move something over the surface of another thing

rubber - n. a substance made from the liquid of trees with the same name, or a similar substance made from chemicals

ruin - v. to damage severely; to destroy

rule - v. to govern or control; to decide; n. a statement or an order that says how something must be done

run - v. to move quickly by steps faster than those used for walking