fault-tolerance
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C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

Meaning
The ability of a system to continue operating properly in the event of the failure of some of its components.
Example
Fault-tolerance ensures dependable systems.
B2 noun /ˈfræk.ʃən/

Fraction

Meaning
a numerical quantity that is not a whole number; a small or tiny part of something
Example
Only a small fraction of the population voted in the local election.
B2 noun /ˈfæbrɪk/

fabric

Meaning
Cloth or material produced by weaving or knitting fibers.
Example
The tailor used silk fabric to make the dress.
A2 adjective /frɛʃ/

fresh

Meaning
new, recently made, or clean and pure
Example
The bread is still fresh from the oven.
A2 noun /ˈfer.i.teɪl/

Fairy-tale

Meaning
a children's story about magical and imaginary beings and lands
Example
Children love listening to fairy-tales before bedtime.
B1 noun /ˈfeɪ.ljər/

Failure

Meaning
lack of success; an unsuccessful person, enterprise, or thing
Example
The project's failure was due to poor planning and communication.
C1 adjective /ˈfɑːð.ər.ləs/

fatherless

Meaning
without a father
Example
The fatherless child relied on the support of his community.
B1 adjective /fɒnd/

fond

Meaning
having a strong liking or affection for something or someone
Example
She is fond of painting and spends hours in front of her canvas.
C1 noun flɛər

flair

Meaning
A natural ability to do something well.
Example
She has a flair for design, always creating visually stunning work.
A2 noun, verb /fɔːrm/

form

Meaning
the shape or structure of something; to bring something into existence
Example
Students filled out the registration form.
A2 noun /fraɪd raɪs/

Fried rice

Meaning
a dish of cooked rice that has been stir-fried in a wok or frying pan
Example
We ordered chicken fried rice from the Chinese restaurant.
A2 noun /faɪl/

File

Meaning
a tool with a rough surface for smoothing or shaping hard materials; a collection of papers or data
Example
He used a metal file to smooth the rough edges.
A1 adjective /fʊl/

full

Meaning
Containing as much or as many as possible; complete.
Example
The glass is full of water.
B2 adverb /ˈfræŋkli/

Frankly

Meaning
honestly; openly; in a direct manner
Example
Frankly, I think this plan needs more consideration.
A2 noun, verb /fuːl/

fool

Meaning
a silly or stupid person; to trick someone
Example
He felt like a fool after believing the prank.
B2 noun /ˈfɔːr.kæst/

Forecast

Meaning
a prediction or estimate of future events, especially coming weather conditions
Example
The weather forecast predicted heavy rain for the entire weekend.
C1 noun ˌfiː.zəˈbɪl.ə.ti

feasibility

Meaning
The state or degree of being easily or conveniently done; possibility.
Example
The company conducted a feasibility study before launching the project.
C2 adjective /ˈfæð.əm.ləs/

fathomless

Meaning
impossible to understand or measure; very deep
Example
The ocean seemed fathomless as it stretched to the horizon.
B2 verb /ˈflætər/

flatter

Meaning
to praise excessively or insincerely to gain favor
Example
He tried to flatter his boss to get a promotion.
C2 adjective /ˈfiːbəlˌmaɪndɪd/

feebleminded

Meaning
lacking intelligence or mental capacity; foolish or weak-minded
Example
The feebleminded man struggled to understand basic instructions.
C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

Meaning
a large cold pool in ancient Roman baths used for cooling off after hot baths
Example
The ruins of the Roman frigidarium are still visible today.
C2 adjective /ˈflʌməksd/

flummoxed

Meaning
Completely confused or bewildered.
Example
He looked flummoxed after hearing the strange question.
C1 adjective + noun ˈfeɪvərəbəl klaɪˈmætɪk kənˈdɪʃənz

favorable climatic conditions

Meaning
Weather conditions that are suitable and beneficial for growth or development
Example
Winter offers favorable climatic conditions for farming.
B1 noun /ˈfes.tə.vəl/

Festival

Meaning
a day or period of celebration, typically for religious reasons; an organized series of concerts, films, etc.
Example
The music festival attracted thousands of visitors from around the world.
B2 noun ˌfʌŋk.ʃəˈnæl.ə.ti

functionality

Meaning
The quality of being functional; the ability to work or operate as intended.
Example
The new refrigerator has improved functionality.
C2 noun /flæks/

flax

Meaning
a plant whose fibers are used to make linen and whose seeds are edible
Example
Flax is often used in making linen fabrics.
A2 adjective /fɪt/

Fit

Meaning
suitable; appropriate; healthy; in good physical condition; ready
Example
He is fit and healthy.
C2 noun /ˈfæn.feər/

fanfare

Meaning
a short ceremonial tune or display of publicity to attract attention
Example
The new product was launched with much fanfare.
C1 adjective /fɪkˈtɪʃəs/

fictitious

Meaning
not real or true; imaginary or fabricated
Example
The story he told was entirely fictitious.
B1 noun /feɪm/

Fame

Meaning
the condition of being known or talked about by many people
Example
The young actor achieved international fame with his latest movie.
C1 verb /ˈfɔːltər/

falter

Meaning
to hesitate or lose strength or momentum
Example
Her voice faltered as she delivered the speech.
C1 noun /fɪˈdɛl.ɪ.ti/

fidelity

Meaning
Faithfulness to a person, cause, or belief, demonstrated by continuing loyalty and support.
Example
A dog's fidelity to its owner is unmatched.
C1 noun /ˈfɔːrwɜːrd/

foreword

Meaning
a short introduction at the beginning of a book, typically written by someone other than the author
Example
The foreword of the book was written by a famous historian.
A2 adjective /ˈfæstɪst/

fastest

Meaning
moving or capable of moving at the highest speed
Example
Usain Bolt is the fastest runner in the world.
B2 noun /fleʃ/

Flesh

Meaning
the soft substance consisting of muscle and fat that is found between the skin and bones
Example
The doctor examined the wound to check if it had penetrated the flesh.
C1 noun /fiːt/

feat

Meaning
an achievement that requires great courage, skill, or strength
Example
Climbing Mount Everest was a remarkable feat.
B2 adverb /ˈfɔːrməli/

formally

Meaning
in a formal or official manner; according to established rules or conventions
Example
The agreement was formally signed by both parties.
C1 verb /ˈflʌtər/

flutter

Meaning
to move or flap quickly and lightly; to beat or wave with small rapid motions
Example
The butterfly began to flutter its wings in the sunlight.
A2 adjective, noun /ˈfeɪvərɪt/

favorite

Meaning
Preferred over all others; something or someone especially liked.
Example
Chocolate is my favorite ice cream flavor.
C1 adjective /ˈfɛrəl/

feral

Meaning
existing in a wild or untamed state; not domesticated
Example
The feral cat roamed the streets at night.
C1 noun /ˌfɜːrmənˈteɪʃən/

fermentation

Meaning
a chemical process by which substances like sugar are converted into alcohol or acids using microorganisms
Example
The fermentation of grapes produces wine.
C2 noun /fiːˈkʌndɪti/

fecundity

Meaning
the ability to produce an abundance of offspring or new growth; fertility
Example
The fecundity of the river delta supports diverse wildlife.
A2 adjective /fəˈmɪl.jər/

Familiar

Meaning
well-known; easily recognized; having knowledge of; informal and friendly
Example
This song sounds familiar to me.
B2 adjective /fɔːrˈsiːəbl/

foreseeable

Meaning
Able to be predicted or expected in advance
Example
The company is unlikely to make changes in the foreseeable future.
B2 noun /ˈfʌndˌreɪzɪŋ/

fundraising

Meaning
the process of collecting money for a cause or project
Example
The organization is organizing a fundraising event.
C1 noun /fɪˈnɛs/

finesse

Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
A1 noun /ˈfʊtˌbɔːl/

football

Meaning
A team sport played with a ball that is kicked or carried to score points.
Example
They watched a football match on TV.
C2 adjective /fluːˈɛnʃəl/

fluential

Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
B2 noun /fɪɡ/

Fig

Meaning
a soft sweet fruit that is purple or green on the outside and has many small seeds
Example
The fig tree in our backyard produces delicious fruits every summer.
C1 noun /fiˈæs.koʊ/

fiasco

Meaning
a complete failure, especially a ludicrous or humiliating one
Example
The event turned into a complete fiasco due to poor planning.
C1 noun/adjective /fɔːrˈboʊdɪŋ/

foreboding

Meaning
A feeling that something bad will happen; ominous.
Example
She felt a deep sense of foreboding as she entered the abandoned house.
C1 adjective /ˈfɜːrtɪv/

furtive

Meaning
Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble.
Example
He cast a furtive glance at the door before leaving.
C2 adjective /ˈfjuːzəbl/

fusible

Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
B1 adverb /ˈfriːkwəntli/

Frequently

Meaning
often; regularly; many times
Example
She frequently visits her grandmother on weekends.
B2 verb /fliː/

flee

Meaning
To run away from danger or a threatening situation.
Example
The villagers had to flee during the flood.
A2 noun /frɪdʒ/

fridge

Meaning
a household appliance used to keep food and drinks cold to preserve freshness
Example
I put the milk back in the fridge after breakfast.
C2 adjective /ˈfrɪski/

Frisky

Meaning
lively; energetic; playful; mischievous
Example
The frisky puppy ran around the garden playfully.
C1 noun (plural of fungus) /ˈfʌndʒaɪ/

fungi

Meaning
a group of spore-producing organisms such as mushrooms, molds, and yeasts
Example
Fungi play an important role in breaking down organic matter in nature.
C1 verb /ˈfɪdʒɪt/

fidget

Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
C1 noun/verb /ˈfʌrəʊ/

furrow

Meaning
A long narrow trench made in the ground by a plow; to make wrinkles or grooves.
Example
The farmer plowed furrows in the field.
C1 noun /ˈfɔːrˌθɔːt/

forethought

Meaning
careful consideration of what will be necessary or may happen in the future
Example
With a little forethought, we could have avoided the problem.
C1 noun ˈfɔː.saɪt

foresight

Meaning
The ability to predict or the action of predicting what will happen or be needed in the future.
Example
His foresight helped the company avoid financial losses.
A2 adjective /ˈfɪnɪʃt/

finished

Meaning
completed or brought to an end
Example
The painting is finished and ready to display.
B2 verb /ˈfæsən/

fasten

Meaning
To attach or secure something firmly in place
Example
Please fasten your seatbelt before the plane takes off.
B1 noun /frʌˈstreɪʃən/

frustration

Meaning
The feeling of being upset or annoyed due to inability to achieve something.
Example
He felt deep frustration when his plans failed.
C2 noun /ˈfʌriər/

furrier

Meaning
A person who prepares or deals in furs.
Example
The furrier displayed fine coats in his shop.
A1 adjective /ˈfrɛndli/

friendly

Meaning
Kind and pleasant; showing goodwill and affection.
Example
The shop owner is very friendly to new customers.
B2 noun ˈfjuː.tʃɚ ˌdʒen.əˈreɪ.ʃənz

future generations

Meaning
People who have not yet been born, considered in terms of the environment or society they will inherit.
Example
Sustainable development ensures a better life for future generations.
B2 noun /ˈfriːˌlænsər/

freelancer

Meaning
A person who works independently without being permanently employed by one organization.
Example
She works as a freelancer designing websites for different clients.
B2 adjective /ˈfɜːr.taɪl/

Fertile

Meaning
capable of producing abundant vegetation or crops; able to conceive children
Example
The fertile soil in this region makes it perfect for growing vegetables.
C2 adjective /ˈfrɒθi/

frothy

Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
B2 adverb /ˈflu:əntli/

Fluently

Meaning
in a smooth, effortless, and articulate manner; with ease and skill
Example
She speaks French fluently.
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
C2 adverb /ˈfɔːrbi/

forby

Meaning
In addition; besides (archaic Scottish/English word).
Example
He is kind and generous, and wise forby.
C1 noun ˈflɔː.rə ænd ˈfɔː.nə

flora and fauna

Meaning
The plants and animals of a particular region, habitat, or geological period.
Example
The Galápagos Islands have unique flora and fauna.
C2 noun /ˈfɔːrˌpiːk/

forepeak

Meaning
The compartment in the forward part of a ship, often used for storage.
Example
The sailors stored extra ropes in the forepeak.
C2 noun /ˈfeɪ.tə.lɪ.zəm/

fatalism

Meaning
the belief that all events are predetermined and inevitable
Example
He embraced fatalism, believing that nothing he did could change his destiny.
C2 verb /fleɪ/

flay

Meaning
to strip off the skin of something or criticize severely
Example
The chef flayed the fish before cooking it.
B2 verb /fʊlˈfɪl/

fulfill

Meaning
to complete or accomplish something, especially a task or promise
Example
He worked hard to fulfill his dreams.
C1 verb /fɔrˈstɔl/

forestall

Meaning
to prevent by acting in advance; to anticipate and counter
Example
They forestalled the crisis by taking immediate action.
C2 adjective /ˈfɛstəl/

festal

Meaning
relating to a festival or celebration
Example
The hall was decorated in a festal manner for the wedding.
B2 noun /ˌfiː.ɑːnˈseɪ/

Fiancee

Meaning
a woman who is engaged to be married
Example
John bought a beautiful engagement ring for his fiancee.
C1 noun /ˈfjʊərɔːr/

furor

Meaning
An outbreak of public anger or excitement.
Example
The politician's remarks created a furor in the media.
A2 noun /fæn/

Fan

Meaning
a person who has a strong interest in or admiration for a particular person or thing; a device for creating air current
Example
She is a huge fan of classical music and attends every concert in the city.
C2 noun /ˈfriːˌmeɪsən/

freemason

Meaning
A member of an international fraternity known as Freemasonry, focused on moral and spiritual values.
Example
His grandfather was a respected freemason in the community.
C1 noun /ˈfjuː.də.lɪ.zəm/

feudalism

Meaning
the social system in medieval Europe in which people worked and fought for nobles who gave them protection and land in return
Example
Feudalism shaped the political structure of medieval Europe.
C1 noun/adjective ˈflɛdʒ.lɪŋ

fledgling

Meaning
New, inexperienced, newly established.
Example
The fledgling startup needs investment.
C2 adjective fəˈleɪ.ʃəs

fallacious

Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
C1 adjective /fəˈnætɪkəl/

fanatical

Meaning
showing extreme enthusiasm or obsession
Example
She has a fanatical interest in collecting vintage stamps.
C2 adjective /ˈfrɒlɪksəm/

Frolicsome

Meaning
joyful; playful; merry; cheerful
Example
The frolicsome children laughed and played in the park.
A2 adverb/adjective/verb /ˈfɜːrðər/

further

Meaning
At a greater distance; to advance or promote something.
Example
She studied hard to further her career.
B2 adjective /ˈfeɪvərəbl/

favourable

Meaning
Expressing approval, support, or positivity; advantageous or beneficial
Example
The weather conditions were favourable for the outdoor event.
C1 adjective /ˈfæn.sɪ.fəl/

fanciful

Meaning
overimaginative, unrealistic, or whimsical
Example
The story was too fanciful to be true.
B2 noun /ˈfɔːrmjələ/

formula

Meaning
a fixed method for doing something; a mathematical or chemical rule expressed in symbols
Example
The scientist discovered a new formula for the medicine.
B2 adjective /fɪərs/

Fierce

Meaning
violent; aggressive; showing strong feeling or determination
Example
The fierce storm destroyed many houses in the village.
C2 adjective /ˈfʊtˌluːs/

footloose

Meaning
Free to go anywhere or do anything; not tied down by responsibilities.
Example
After graduating, he felt footloose and ready to explore the world.
B2 noun /fɛər/

fare

Meaning
the money paid for a journey on public transport; also food or treatment provided
Example
The bus fare to the city center is five dollars.
A1 noun/verb /fɪʃ/

fish

Meaning
an aquatic animal with gills, or to try to catch such animals
Example
He went to the lake to fish early in the morning.
C2 adjective /ˈfɒp.ɪʃ/

Foppish

Meaning
excessively concerned with one's appearance and clothes; vain about dress
Example
His foppish behavior and expensive clothes made him stand out.
A1 verb /ˈfɒloʊ/

follow

Meaning
to move behind someone or something; to go after or come after
Example
The children followed their teacher into the classroom.
C2 adjective /ˈfɔːnɪŋ/

fawning

Meaning
displaying exaggerated flattery or affection
Example
Her fawning compliments made everyone uncomfortable.
C1 noun /fiːnd/

fiend

Meaning
an evil spirit or demon; a wicked or cruel person; someone obsessed with a particular thing
Example
He is a real fiend when it comes to solving puzzles.
B1 adjective /fɪkst/

fixed

Meaning
firmly in place; not changing or movable
Example
The schedule for the meeting is fixed for Monday morning.
C2 adjective /ˈfɒksi/

foxy

Meaning
Clever, cunning, or attractive.
Example
He came up with a foxy plan to win the game.
B2 noun /ˈfɛə(r)nɪs/

fairness

Meaning
the quality of being free from bias, favoritism, or injustice
Example
She always strives for fairness in her decisions.
A1 adjective /fjuː/

few

Meaning
A small number of; not many.
Example
Only a few students attended the class.
A2 verb /fɪks/

fix

Meaning
To repair or make something work again.
Example
The mechanic fixed the broken car.
C1 noun /ˈfɛərˌɡraʊndz/

fairgrounds

Meaning
A designated area where fairs, exhibitions, and amusement events are held
Example
The town set up rides and stalls at the fairgrounds for the annual festival.
C2 adjective /ˈfraʊzi/

frowzy

Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
C2 verb /frɪsk/

frisk

Meaning
To search a person by patting their clothing to check for concealed items.
Example
The security guard frisked the man at the entrance.
C1 adjective ˈfɔːr.mɪ.də.bəl

formidable

Meaning
Inspiring fear or respect through being impressively large, powerful, intense, or capable.
Example
The boxer was a formidable opponent in the ring.
B2 verb /fjuːz/

fuse

Meaning
To join or blend two or more things together into one.
Example
The two metals fused under high heat.
C1 adjective /ˈfɔːrmətɪv/

formative

Meaning
Having a lasting influence on a person's development or character.
Example
Childhood is often described as a formative stage in life.
A1 adjective /fɜːrst/

first

Meaning
coming before all others in time, order, or importance
Example
She was the first to arrive at the meeting.
A2 adjective /fɔːls/

False

Meaning
not true; incorrect; deceptive; artificial
Example
The witness gave false testimony in court.
C1 noun /fəˈnætɪsɪzəm/

fanaticism

Meaning
the quality of being fanatical; extreme zeal or obsession
Example
Religious fanaticism can lead to intolerance and conflict.
C2 adjective /ˈflaɪti/

flighty

Meaning
unstable, impulsive, or easily distracted; lacking seriousness or stability
Example
She’s too flighty to stick with one job for long.
C2 noun /ˈflæt.ər.ər/

Flatterer

Meaning
a person who lavishes praise, often insincerely and in order to gain advantage
Example
The king was surrounded by flatterers who only told him what he wanted to hear.
B1 noun /fɒɡ/

Fog

Meaning
a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface that reduces visibility
Example
Dense fog covered the highway this morning.
C1 verb ˈflʌk.tʃu.eɪt

fluctuate

Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
C2 adjective /ˈfʌŋɡəs/

fungous

Meaning
relating to or resembling a fungus
Example
The damp basement had a fungous smell.