fire - v. to shoot a gun; n. the heat and light produced by something burning

fireworks - n. rockets producing bright fire in the sky, used in holiday celebrations²

firm - ad. not easily moved or changed ("She is firm in her opinion.")

first - ad. coming before all others

fish - n. a creature that lives and can breathe in water

fit - v. to be of the correct size or shape ("These shoes fit my feet.")

fix - v. to make good or right again

flag - n. a piece of colored cloth used to represent³ a nation, government or organization

flat - ad. smooth; having no high places

flee⁴ - v. to run away from

float - v. to be on water without sinking; to move or be moved gently on water or through air

flood - v. to cover with water; n. the movement of water out of a river, lake or ocean onto land

floor - n. the bottom part of a room for walking on ("The book fell to the floor."); the level of a building ("The fire was on the first floor.")

flow - v. to move like a liquid

flower - n. the colored part of plants that carry seeds

fluid⁵ - n. any substance⁶ that can flow, such as a liquid

fly - v. to move through the air with wings, like a bird or airplane; to travel in an airplane or flying vehicle⁷

fog - n. a mass of wet air that is difficult to see through; a cloud close to the ground

follow - v. to come or go after; to accept the rule or power of; to obey

food - n. that which is taken in by all living things for energy, strength and growth⁸

fool - v. to make someone believe something that is not true; to trick; n. a person who is tricked easily

foot - n. the bottom part of the leg; the part of the body that touches the ground when a person or animal walks

for - prep. because of ("He is famous for his work."); in exchange ("Give me one dollar for the book."); through space or time ("They travelled for one hour."); representative⁹ of ("I speak for all people."); to be employed by ("She works¹ for a computer company.")

force - v. to make someone do something or make something happen by using power; n. power, strength; strength used against a person or object; military¹⁰ power of a nation; a military group

foreign - ad. of, about or from another nation; not from one's own place or country

forest - n. a place of many trees

forget - v. to not remember

forgive - v. to pardon; to excuse; to remove guilt¹¹

form - v. to make; to start; to shape ("They formed a swim team."); n. a kind ("Swimming is a form of exercise.") former - ad. earlier in time; not now

forward - ad. the direction in front of; toward¹² the front

free - v. to release¹³; ad. not controlled by another or by outside forces; not in prison; independent; not limited by rules; without cost

freedom - n. the condition of being free

freeze - v. to cause or to become very cold; to make or to become hard by cold