Meaning: To make air, water, or land dirty and unsafe.

Example: Chemicals can pollute the river water.

Meaning: Poisonous; not safe for people or animals.

Example: Be careful because these waste materials are toxic.

Meaning: To put someone or something in danger.

Example: Pollution will endanger many animals.

Meaning: Related to energy from atoms.

Example: They are building a new nuclear power plant.

Meaning: A line that the earth turns around.

Example: The earth rotates on its axis once a day.

Meaning: The line around the middle of the earth.

Example: It is very hot near the equator.

Meaning: The study of places on the earth.

Example: We learned about mountains in geography class.

Meaning: To move around something in a circle.

Example: The moon revolves around the earth.

Meaning: A chemical that can burn or damage things.

Example: Acid can damage the surface of the metal.

Meaning: A thing that pulls some metals to it.

Example: I used a magnet to pick up the paper clips.

Meaning: Energy that moves as waves or small parts.

Example: The sun sends out radiation to the earth.

Meaning: A machine or moon that moves around a planet.

Example: The satellite sends weather data to the ground.

Meaning: The air around the earth.

Example: The atmosphere protects us from the sun.

Meaning: A very small part of a thing.

Example: Everything in the world is made of atoms.

Meaning: A gas that people breathe out.

Example: Plants need carbon dioxide to grow.

Meaning: A basic kind of material.

Example: Gold is a basic chemical element.

Meaning: To change from water into gas.

Example: The sun will evaporate the water on the road.

Meaning: To be real or present.

Example: Do you believe that aliens exist in space?

Meaning: A very light gas.

Example: Rockets often use hydrogen for fuel.

Meaning: To change from hard to liquid.

Example: The ice will melt if you leave it in the sun.

Meaning: A very small part made from atoms.

Example: A water molecule has two hydrogen atoms.

Meaning: A gas in the air.

Example: Nitrogen is important for all living things.

Meaning: A gas that people need to live.

Example: We need oxygen to breathe and live.

Meaning: A thing that is not liquid or gas.

Example: Ice is the solid form of water.

Meaning: Hot water gas.

Example: Steam is coming out of the hot kettle.

Meaning: A place with no air.

Example: There is a vacuum in outer space.

Meaning: Gas from a liquid.

Example: You can see your breath as vapor when it is cold.

Meaning: To use all of something.

Example: We should not exhaust our natural resources.

Meaning: About the whole world.

Example: Global warming is a serious problem.

Meaning: Rock that has metal in it.

Example: Iron is taken out of the ore found in mines.

Meaning: Something useful that people can use.

Example: Oil is a very important natural resource.

Meaning: To make something dirty or unsafe.

Example: Bacteria can contaminate the food.

Meaning: Gas or smoke sent into the air.

Example: The government wants to reduce car emissions.

Meaning: Giving off dangerous energy.

Example: Nuclear waste is radioactive and dangerous.

Meaning: To breathe out.

Example: We exhale carbon dioxide when we breathe.

Meaning: To breathe in.

Example: You should inhale deeply during exercise.

Meaning: A natural material from the earth.

Example: Vitamins and minerals are good for your body.

Meaning: Bad-smelling smoke or gas.

Example: The garage was full of engine fumes.

Meaning: Height above the sea.

Example: The plane is flying at a high altitude.

Meaning: Rain, snow, or other falling water.

Example: There will be a lot of precipitation this winter.

Meaning: The use of science to make or do things.

Example: Computers are a big part of technology.

Meaning: To make products in a factory.

Example: This factory will manufacture car parts.

Meaning: Something that is built.

Example: The bridge is a very large structure.

Meaning: Parts that work together in a machine.

Example: The mechanism of the clock is old.

Meaning: The strength of electricity.

Example: Be careful because the voltage is high here.

Meaning: To make sound or a signal stronger.

Example: Use this device to amplify the sound.

Meaning: A sudden increase.

Example: A power surge can damage your computer.

Meaning: Power of an engine.

Example: The car has a lot of horsepower.

Meaning: Easy to carry.

Example: I have a small portable radio for camping.

Meaning: To put things one on another.

Example: Please stack the boxes in the corner.

Meaning: A rule with numbers or letters.

Example: Do you know the formula for the area of a square?

Meaning: Related to machines.

Example: The car had a mechanical problem.

Meaning: A home machine that uses electricity.

Example: A toaster is a kitchen appliance.

Meaning: A path for electricity.

Example: Electricity travels through the circuit.

Meaning: A material that lets electricity or heat pass.

Example: Copper is a good conductor.

Meaning: To cover something to stop heat or electricity.

Example: We must insulate the wires.

Meaning: To make or produce.

Example: This machine will generate electricity.

Meaning: A machine that makes electricity.

Example: We use a generator when the power goes out.

Meaning: Done by machines.

Example: The factory has an automated assembly line.

Meaning: A handle used to turn something.

Example: Turn the crank to start the engine.

Meaning: A tool or machine made for a job.

Example: This device helps you measure distance.

Meaning: A tool that makes holes.

Example: Use the drill to make a hole in the wall.

Meaning: Glasses that protect your eyes.

Example: Wear goggles when you use the saw.

Meaning: A tool used to hit nails.

Example: I used a hammer to fix the fence.

Meaning: A tool used to hold or pull things.

Example: Use the pliers to hold the wire tightly.

Meaning: Red-brown material on old metal.

Example: The old gate is covered in rust.

Meaning: A tool used to cut paper or cloth.

Example: I need scissors to cut this string.

Meaning: A room where people make or fix things.

Example: He works in his workshop on weekends.

Meaning: To organize people or things together.

Example: We need to coordinate our schedules.

Meaning: Putting equipment in place.

Example: The installation of the software took an hour.

Meaning: Work that keeps something in good condition.

Example: Regular maintenance is important for cars.

Meaning: A problem when a machine does not work.

Example: The computer malfunction caused us to lose data.

Meaning: A screen or tool used to check something.

Example: You can see the information on the monitor.

Meaning: A large repair job.

Example: The truck needs a complete engine overhaul.

Meaning: A tube for water, gas, or oil.

Example: The oil travels through a long pipe.

Meaning: To send a signal, message, or power.

Example: The antenna will transmit the radio waves.

Meaning: To use.

Example: We should utilize all the available tools.

Meaning: To adjust a tool so it is correct.

Example: The scale needs to be calibrated.

Meaning: The physical parts of a computer.

Example: The hard drive is computer hardware.

Meaning: Programs for a computer.

Example: I need to install new software.

Meaning: On or in a ship, plane, or vehicle.

Example: All passengers are now aboard the plane.

Meaning: Goods carried by ship, plane, or truck.

Example: The ship is carrying a cargo of oil.

Meaning: A group of ships, planes, or vehicles.

Example: The company has a fleet of delivery trucks.

Meaning: To send something into the air or water.

Example: They will launch the new ship tomorrow.

Meaning: A tool that finds objects with radio waves.

Example: The pilot used radar to see the plane.

Meaning: A ship that goes under water.

Example: The submarine can stay under water.

Meaning: A large ship or boat.

Example: A large vessel arrived at the port.

Meaning: Color or clothing that makes things hard to see.

Example: The soldiers used green camouflage.

Meaning: The land in an area.

Example: The rocky terrain made walking hard.

Meaning: Planning how to move people and supplies.

Example: Logistics is important for moving supplies.

Meaning: Military equipment and supplies.

Example: The base needs more materiel.

Meaning: A plan used to reach a goal.

Example: The team used a new tactic to win.

Meaning: A planned action or job.

Example: The rescue operation was successful.

Meaning: To stop fighting and give up.

Example: The enemy decided to surrender.

Meaning: Hard covering for protection.

Example: The tank has very thick armor.

Meaning: A strong explosion.

Example: We heard a loud blast from the quarry.

Meaning: A helicopter.

Example: The chopper landed on the hospital roof.

Meaning: To hide something.

Example: He tried to conceal the map.

Meaning: To meet or find something by chance.

Example: We might encounter problems.

Meaning: To lift something with a machine or rope.

Example: They used a crane to hoist the heavy engine.

Meaning: A careful or skillful move.

Example: The pilot performed a difficult maneuver.

Meaning: A weapon that flies to a target.

Example: The military tested a new missile.

Meaning: A person who plans a route.

Example: The navigator checked the map.

Meaning: To push something forward.

Example: The engine will propel the boat.

Meaning: Bullets and other things used in weapons.

Example: The soldiers needed more ammunition.

Meaning: The tube part of a gun.

Example: He cleaned the barrel of the gun.

Meaning: A small metal object fired from a gun.

Example: The bullet hit the center of the target.

Meaning: A case with a bullet and powder.

Example: He put a cartridge into the gun.

Meaning: To burst with force.

Example: The bomb will explode if you drop it.

Meaning: A gun that one person can carry.

Example: Be careful when you handle a firearm.

Meaning: The part of a gun that holds bullets.

Example: Check the magazine for bullets.

Meaning: The part of a gun that you press to fire.

Example: Don’t touch the trigger until you are ready.

Meaning: Fighting in a war.

Example: Modern warfare uses technology.

Meaning: A military ship.

Example: The warship is equipped with radar.

Meaning: A list or amount of things in stock.

Example: We need to take an inventory.

Meaning: To force people or things to move.

Example: The storm will displace many families.

Meaning: To take by force.

Example: The army tried to capture the base.

Meaning: To make something explode.

Example: They will detonate the explosives at noon.

Meaning: To protect from attack.

Example: Soldiers are ready to defend their country.

Meaning: A friend country or group.

Example: France was an important ally in the war.

Meaning: A government office or group.

Example: The space agency is planning a new mission.

Meaning: A plan for how to spend money.

Example: We have a strict budget for the trip.

Meaning: Money you get from work or business.

Example: His monthly income increased.

Meaning: Money you must pay.

Example: Rent is our biggest monthly expense.

Meaning: To pay for something over time.

Example: He decided to finance the car.

Meaning: Money paid regularly for work.

Example: She receives her salary every month.

Meaning: Money used in a country.

Example: What is the local currency here?

Meaning: How money and business work in a country.

Example: The economy is growing very fast.

Meaning: To sell goods to another country.

Example: Japan exports many cars.

Meaning: To bring goods from another country.

Example: The country imports a lot of oil.

Meaning: Buying and selling between people or countries.

Example: International trade is important.

Meaning: Goods for sale.

Example: This store sells high-quality merchandise.

Meaning: To leave a job officially.

Example: The manager decided to resign.

Meaning: A job.

Example: Please write your occupation on this form.

Meaning: A move to a higher job or rank.

Example: He got a promotion after hard work.

Meaning: A thing bought at a low price.

Example: I found a great bargain today.

Meaning: Money taken off a price.

Example: There is a 20 percent discount on shoes.

Meaning: Paper that shows you paid.

Example: Please keep your receipt for the return.

Meaning: Money paid to the government.

Example: The sales tax is included in the price.

Meaning: To buy.

Example: You can purchase tickets online.

Meaning: Money that you owe.

Example: He worked hard to pay off his debt.

Meaning: Work or a job.

Example: It is hard to find employment in this city.

Meaning: A person or company that gives jobs.

Example: My employer is very fair.

Meaning: A person who works for pay.

Example: Every employee must wear a name tag.

Meaning: Without a job.

Example: Many people are currently unemployed.

Meaning: To give someone a job.

Example: They want to hire ten new workers.

Meaning: To make someone leave a job.

Example: The boss had to fire the lazy worker.

Meaning: A written agreement.

Example: They signed a two-year contract.

Meaning: Money given regularly.

Example: My parents gave me a weekly allowance.

Meaning: Money or amount still left.

Example: I will pay the balance next week.

Meaning: Money for a special purpose.

Example: We are raising a fund for the park.

Meaning: Related to buying and selling.

Example: This is a large commercial building.

Meaning: Buying and selling goods or services.

Example: The city is a center for commerce.

Meaning: Worth a lot of money or very useful.

Example: She has a collection of valuable coins.

Meaning: Having a value or price.

Example: How much is this ring worth?

Meaning: How much there is.

Example: I have a small amount of cash.

Meaning: The price of something.

Example: The cost of the meal was very high.

Meaning: Money matters.

Example: She is studying international finances.

Meaning: Businesses that make or sell things.

Example: The car industry is very important.

Meaning: Related to money.

Example: He asked for financial advice.

Meaning: To take something out.

Example: The dentist will extract the tooth.

Meaning: To make pain or trouble less.

Example: This medicine will relieve your headache.

Meaning: A medicine that stops pain.

Example: The doctor gave him an anesthetic.

Meaning: A place or building for a special use.

Example: The hospital is a modern facility.

Meaning: A doctor’s decision about an illness.

Example: The doctor gave him a diagnosis.

Meaning: All the bones in a body.

Example: We saw a dinosaur skeleton.

Meaning: The center or main part.

Example: Exercise helps strengthen your core.

Meaning: To die; a polite phrase.

Example: His grandfather passed away last night.

Meaning: A ceremony after someone dies.

Example: Many friends attended the funeral.

Meaning: Very sad or terrible.

Example: The sudden death was a tragic event.

Meaning: A body part that sends feeling.

Example: He hit a nerve in his tooth.

Meaning: Not able to feel something.

Example: My toes were numb because of the cold.

Meaning: A hole in a tooth.

Example: I have a cavity in my back tooth.

Meaning: To become bad or broken down over time.

Example: Sugar can cause tooth decay.

Meaning: Related to teeth.

Example: You should have a dental checkup.

Meaning: Material put in a tooth hole.

Example: The filling in my tooth came out.

Meaning: A bad body reaction to food, dust, or plants.

Example: He has a severe allergy to nuts.

Meaning: A medicine for pain or fever.

Example: I took an aspirin for my fever.

Meaning: The force of blood in the body.

Example: The nurse checked his blood pressure.

Meaning: A place where people get medical care.

Example: She went to the dental clinic.

Meaning: Medicine.

Example: Don’t take any drug without a doctor’s advice.

Meaning: To look at closely.

Example: The doctor will examine your leg.

Meaning: Sick.

Example: He felt ill after eating the spoiled food.

Meaning: Damage to the body.

Example: He suffered a serious knee injury.

Meaning: Medicine.

Example: Are you currently taking any medication?

Meaning: A medical operation.

Example: The operation lasted for three hours.

Meaning: A small piece of medicine.

Example: You must take this pill after meals.

Meaning: To tell someone to take medicine or rest.

Example: The doctor will prescribe some rest.

Meaning: The beat of the heart that you can feel.

Example: The nurse measured his pulse.

Meaning: Medical care.

Example: The clinic provides excellent treatment.

Meaning: Getting well again.

Example: We wish you a very speedy recovery.

Meaning: A doctor who does operations.

Example: The surgeon is very experienced.

Meaning: A medical operation.

Example: She is recovering after her surgery.

Meaning: The ability to see.

Example: He wears glasses for poor vision.

Meaning: A picture of bones inside the body.

Example: The x-ray showed his arm was fine.

Meaning: Illness from germs.

Example: Keep the wound clean to avoid infection.

Meaning: A body part used for breathing.

Example: Smoking is very bad for your lungs.

Meaning: A tube that carries blood from the heart.

Example: An artery carries blood with oxygen.

Meaning: A tube that carries blood to the heart.

Example: You can see the veins on your hand.

Meaning: To take air in and out.

Example: It was hard to breathe in the smoke.

Meaning: A person who writes a book.

Example: He is the author of many novels.

Meaning: A regular article in a newspaper or website.

Example: I read his sports column every week.

Meaning: To make writing available to people.

Example: They will publish his book next month.

Meaning: Pictures, music, or other creative work.

Example: We went to see the modern art exhibit.

Meaning: New information about events.

Example: I heard the news on the radio.

Meaning: A tool that makes your voice louder.

Example: Please speak into the microphone.

Meaning: A formal talk to people.

Example: The president gave a short speech.

Meaning: A government where people can choose leaders.

Example: Freedom of speech is vital in a democracy.

Meaning: The basic laws of a country.

Example: The constitution protects our rights.

Meaning: A change to a law or agreement.

Example: There was an amendment to the tax law.

Meaning: Beliefs about God or gods.

Example: There are many different religions in the world.

Meaning: An idea.

Example: It is a difficult concept to understand.

Meaning: To choose and start to use.

Example: The school decided to adopt a new method.

Meaning: The leader of a city or town.

Example: The mayor announced a new plan.

Meaning: A person who makes laws in government.

Example: The senator gave a long talk.

Meaning: A legal member of a country.

Example: Every citizen has the right to vote.

Meaning: A system of words, numbers, or signs.

Example: They sent the message in a secret code.

Meaning: A place on the Internet.

Example: Visit our website for more details.

Meaning: A world network of computers.

Example: I use the Internet to research topics.

Meaning: A message sent by computer or phone.

Example: Send me an e-mail with your answer.

Meaning: The way of life of a group of people.

Example: We learned about different cultures.

Meaning: Something people do for a long time.

Example: It is a tradition to eat turkey.

Meaning: People who live in the same area.

Example: Our local community is very active.

Meaning: A country and its people.

Example: The nation celebrated its holiday.

Meaning: For everyone.

Example: This is a public park.

Meaning: Not for everyone.

Example: This is a private road.

Meaning: From a person or group with power.

Example: He received an official government letter.

Meaning: A group that makes laws.

Example: The legislature is voting on the bill.

Meaning: The leader of a state.

Example: The governor visited the town.

Meaning: A government office.

Example: The bureau is investigating the case.

Meaning: A rule or plan for action.

Example: The company has a strict travel policy.

Meaning: Something people must follow.

Example: You must follow the safety rules.

Meaning: A rule made by the government.

Example: It is against the law to speed.

Meaning: Careful study to find facts.

Example: Scientists are doing research on a cure.

Meaning: A message given to many people.

Example: We heard an announcement at the station.

Meaning: A person who checks and prepares writing.

Example: The editor checked the story for errors.

Meaning: An article with an opinion.

Example: I read an editorial about the city.

Meaning: A notice that tries to sell something.

Example: I saw an advertisement for a new car.

Meaning: To pay to get something regularly.

Example: I want to subscribe to this journal.

Meaning: Spoken or written information.

Example: Please leave a message for her.

Meaning: To surprise someone very much.

Example: The magic trick will amaze the children.

Meaning: To know someone or something from before.

Example: I didn’t recognize him with his glasses.

Meaning: To think something is true without being sure.

Example: I assume he is coming because he is late.

Meaning: To support something officially.

Example: Many people endorse the new plan.

Meaning: To respect and like someone.

Example: I admire her for her hard work.

Meaning: To give someone hope or help.

Example: My teacher encouraged me to study.

Meaning: Able to be trusted.

Example: He is a very trustworthy person.

Meaning: Kind words of praise.

Example: He gave her a nice compliment.

Meaning: Thankful.

Example: I am grateful for your kind help.

Meaning: Kind feelings for someone in trouble.

Example: I have a lot of sympathy for them.

Meaning: Strong interest and energy.

Example: The students showed great enthusiasm.

Meaning: Work done well by a group.

Example: The project succeeded because of teamwork.

Meaning: To say good things about someone.

Example: The coach praised the team.

Meaning: To give back the same feeling or action.

Example: If someone is kind, you should reciprocate.

Meaning: A feeling of thanks.

Example: He expressed his gratitude with a gift.

Meaning: Not afraid to do something hard.

Example: The brave man saved the cat.

Meaning: The strength to do something hard.

Example: It takes courage to speak up.

Meaning: Honesty and strong good values.

Example: He is a man of great integrity.

Meaning: The spirit and hope of a group.

Example: The team’s morale is very high.

Meaning: The ability to wait calmly.

Example: You need patience to learn a language.

Meaning: Telling the truth.

Example: Please give me an honest answer.

Meaning: Always supporting someone or something.

Example: He is a very loyal friend.

Meaning: Having good manners.

Example: It is important to be polite to guests.

Meaning: Thinking only about yourself.

Example: Don’t be selfish and share your toys.

Meaning: Willing to give or share.

Example: She is very generous with her money.

Meaning: To make someone unhappy because hopes are not met.

Example: I don’t want to disappoint my parents.

Meaning: To bother someone.

Example: The loud music began to annoy me.

Meaning: Deep sadness.

Example: He felt great grief after losing his dog.

Meaning: A good feeling for someone or something.

Example: You should show respect to your teachers.

Meaning: To be right to get something.

Example: You worked hard, so you deserve a rest.

Meaning: A goal or purpose.

Example: Our objective is to finish the work.

Meaning: Happening all the time.

Example: The constant noise was annoying.

Meaning: Very basic and important.

Example: Reading is a fundamental skill.

Meaning: Useful in real life.

Example: A small car is practical in the city.

Meaning: Possible to do.

Example: It is not feasible to finish today.

Meaning: Something important to do first.

Example: Safety is our first priority.

Meaning: The greatest amount allowed.

Example: There is a speed limit on this road.

Meaning: Not often.

Example: It rarely rains in the desert.

Meaning: To make sure something is true.

Example: Please call to confirm your seat.

Meaning: To check that something is true.

Example: The bank needs to verify your identity.

Meaning: To keep someone or something alive or going.

Example: We have enough food to sustain us.

Meaning: Not clear.

Example: His instructions were very ambiguous.

Meaning: Fair and not choosing sides.

Example: A judge must be objective.

Meaning: A part or share of a whole.

Example: A large proportion of students passed.

Meaning: A comparison of two numbers.

Example: The ratio of girls to boys is 1:1.

Meaning: A plan used to reach a goal.

Example: They used a clever tactic to win.

Meaning: A job or action to do.

Example: My first task is to check my mail.

Meaning: To make something seem real for practice.

Example: This machine can simulate a flight.

Meaning: Enough.

Example: Do we have sufficient time to finish?

Meaning: Working well.

Example: This medicine is very effective.

Meaning: Working well with little waste.

Example: The new engine is more efficient.

Meaning: Easy to see or understand.

Example: It was evident that he was tired.

Meaning: Something that happens again in the same way.

Example: The seasons follow a similar pattern.

Meaning: A set of things in order.

Example: Follow the correct sequence of steps.

Meaning: A stage or part of a process.

Example: We are in the final phase of the work.

Meaning: A measurement, such as length or width.

Example: What are the dimensions of the box?

Meaning: Time between two events.

Example: There was a short interval.

Meaning: To happen.

Example: The accident occurred at 10 o’clock.

Meaning: Not long ago.

Example: I read a recent article about space.

Meaning: In the end; after some time.

Example: If you try, you will eventually succeed.