Concepts 

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4906 total
name POS version def example status simulations
flow verb v1 to move along steadily. A steady flow of traffic.
flower noun the part of a plant that contains the seeds. Flowers often have colorful petals
flu noun an infectious illness, caused by a virus, that often affects the nose and throat. Flu is short for “influenza.”
fluff noun soft fibers or threads from a material.
fluid noun a substance that flows. Gases and liquids are fluids.
fluorescent adjective giving off light.
flush verb to become red in the face. She flushed with anger when her friend shouted at her.
flute noun a wind instrument made of wood or metal. You play it by covering holes with your fingers or special pads and blowing across a hole at one end.
flutter verb to move or flap quickly. The butterflies fluttered around the bush.
fly noun a flying insect with two wings and six legs. Most flies feed on rotting plants and animals. There are many different kinds of fly. bluebottle fly
fly verb to travel through the air. jtoy
foal noun a young horse.
foam noun lots of very small air bubbles. Foam can be liquid or solid.
focus verb v1 to adjust something to make a clearer and sharper image. He focused his camera on the flower.
fog noun a thick cloud of tiny water droplets and dust that hangs in the air, close to the ground.
fold verb v1 to bend one part of something over another.
follow verb v1 to go behind or after someone or something. The dog followed him all the way home. jtoy
food noun v1 all the things that humans and animals eat to help them live and grow. Pasta is an Italian food.
foolish adjective not sensible. He was foolish to walk under the ladder.
foot noun the part of your body that you stand on.
football noun a game for two teams of 11 players. Points are scored by carrying the ball over the other team’s goal line, or kicking it through the other team’s goalposts.
footprint noun the mark left by a foot or shoe.
footstep noun the sound of someone walking. I heard footsteps behind me.
forbid verb to tell a person that they must not do something. I forbid you to drive.
force verb to make a person do something. I was forced to make a choice.
force noun a power. The force of the wind blew her hat off.
forearm noun the part of your arm between your elbow and your wrist.
forecast verb to predict that something will happen in the future. Forecasting the weather.
forehead noun the part of your face above your eyes and below your hair.
foreign adjective belonging to another country. Foreign languages.