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R

race

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

a device that uses radio signals to learn the position or speed of objects that may be too far away to be seen

radiation

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

radio

the system of sending and receiving signals or sounds through the air without wires

raid

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

a road for trains; a company that operates such a road and its stations and equipment

rain

water falling from the sky

raise

to lift up; to move to a higher position; to cause to grow; to increase

rare

not common; not usual; not often

rate

speed; a measure of how quickly or how often something happens; the price of any thing or service that is bought or sold

re

to do again (reorganize, reunite)

reach

to put a hand toward; to arrive at; to come to

react

to act as a result of or in answer to

read

to look at and understand the meaning of written words or numbers

ready

prepared; completed; organized; willing

real

true; truly existing; not false

realistic

in agreement with the way things are

reason

the cause for a belief or act; purpose; something that explains

reasonable

ready to listen to reasons or ideas; not extreme; ready or willing to compromise

rebel

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

to get or accept something given, offered or sent

recent

a short time ago

recession

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

recognize

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

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

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

having the color like that of blood

reduce

to make less or smaller in number, size or amount; to cut

reform

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

refugee

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

refuse

to reject; to not accept, give or do something

regret

a feeling of sadness or sorrow about something that is done or that happens

reject

to refuse to accept, use or believe

relations

understandings or ties between nations; members of the same family; people connected by marriage or family ties

release

to free; to permit to go; to permit to be known or made public

religion

a belief in, or the honoring of, a god or gods

remain

to stay in a place after others leave; to stay the same

remains

a dead body

remember

to think about the past; opposite forget

remove

to take away or take off; to put an end to; to take out of a position or office

repair

work done to fix something

repeat

to say or do again

report

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

to act in the place of someone else; to substitute for; to serve as an example

repress

to control or to restrict freedoms by force

request

to ask for; n. the act of asking for

require

to need or demand as necessary

rescue

to free from danger or evil

research

a careful study to discover correct information

resign

to leave a position, job or office

resist

to oppose; to fight to prevent

resolution

an official statement of agreement by a group of people, usually reached by voting

resource

anything of value that can be used or sold

responsible

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

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

restrain

to keep controlled; to limit action by a person or group

restrict

to limit; to prevent from increasing or becoming larger

result

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

retire

to leave a job or position because one is old or in poor health

return

to go or come back; to bring, give, take or send back

revolt

to protest violently; to fight for a change, especially of government

rice

a food grain

rich

having much money or goods; having plenty of something

ride

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

right

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

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

rise

to go up; to go higher; to increase; to go from a position of sitting or lying to a position of standing

risk

the chance of loss, damage or injury

river

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

road

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

to take money or property secretly or by force; to steal

robot

a machine that moves and performs tasks

rock

a hard piece of mineral matter

rocket

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

to turn over and over; to move like a ball

room

a separate area within a building with its own walls

root

the part of a plant that is under the ground and takes nutrients from the soil

rope

a long, thick piece of material made from thinner pieces of material, used for tying

rough

not flat or smooth; having an uneven surface; violent; not made well

round

having the shape of a ball or circle

rub

to move something over the surface of another thing

rubber

a substance made from the liquid of trees with the same name, or a similar substance made from chemicals

ruin

to damage severely; to destroy

rule

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

run

to move quickly by steps faster than those used for walking


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