fifteen
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A1 number /ˌfɪfˈtiːn/

fifteen

Meaning
the number 15
Example
There are fifteen students in the class.
C1 verb /flɑp/

flop

Meaning
to fall or move heavily and clumsily; to fail completely
Example
The new movie flopped at the box office.
C2 noun /fluːk/

fluke

Meaning
A stroke of luck; an unexpected piece of good fortune.
Example
Winning the lottery was a complete fluke.
B2 noun ˈfreɪm.wɜːk

framework

Meaning
An essential supporting structure of a building, vehicle, or object; a basic structure underlying a system, concept, or text.
Example
A strong framework is vital for governance.
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 adjective /ˈfækʃəs/

factious

Meaning
causing disagreement or division within a group; inclined to form factions
Example
The debate became factious, splitting the committee into rival camps.
C2 noun /ˈfiːæt/

fiat

Meaning
an official order or decree; authoritative command
Example
The new policy was enacted by royal fiat.
C2 adjective /ˈflɒrɪd/

florid

Meaning
Having a red or flushed complexion; or excessively ornate and intricate.
Example
The speaker’s florid style made the lecture hard to follow.
B1 adjective /ˈfəʊkəst/

focused

Meaning
Directing a great deal of attention or effort toward a particular activity, situation, or person.
Example
Staying focused during work hours enhances productivity.
B1 noun /flæʃ/

Flash

Meaning
a sudden brief burst of bright light; a very brief moment
Example
There was a bright flash of lightning followed by thunder.
B1 noun /ˈfeɪvər/

favor

Meaning
An act of kindness or approval.
Example
She asked him for a small favor.
B1 noun /ˈfæktər/

factor

Meaning
A circumstance, fact, or influence that contributes to a result.
Example
Weather is an important factor in crop production.
B2 noun /ˈfeɪbəl/

fable

Meaning
a short story, typically featuring animals as characters, that conveys a moral lesson
Example
Aesop’s fables are famous for teaching valuable lessons through simple stories.
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.
C1 adjective /ˈflaʊəri/

flowery

Meaning
Full of flowers or overly elaborate in style or language.
Example
She wrote a flowery letter filled with poetic phrases.
B1 noun /fɔːlt/

Fault

Meaning
an unattractive or unsatisfactory feature; responsibility for an accident or misfortune
Example
The accident was caused by a fault in the car's braking system.
C1 noun /ˈfɔːls.hʊd/

Falsehood

Meaning
the state of being untrue; a lie
Example
The politician was caught spreading falsehoods about his opponent.
B2 noun /ˈfaɪbər/

fiber

Meaning
a thread or filament from which a textile is formed; dietary substance from plants that aids digestion
Example
Fruits and vegetables are high in fiber.
B2 adjective /ˈfɔːlti/

faulty

Meaning
Having defects or imperfections; not working properly
Example
The device stopped working because it was faulty.
C2 verb /fɔːrˈdʒʌdʒ/

forejudge

Meaning
To judge beforehand without adequate information.
Example
It is unfair to forejudge someone without knowing the facts.
C1 noun /ˈfɔːrdʒər/

forger

Meaning
a person who makes fake documents, artworks, or signatures
Example
The police arrested a forger who had been selling counterfeit paintings.
C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
A1 adjective /ˈfeɪ.məs/

famous

Meaning
Known about by many people; renowned.
Example
This area is famous for its unique heritage.
B2 adverb /ˈfɔ:rmoast/

Foremost

Meaning
most importantly; above all; in the first place
Example
First and foremost, we need to ensure safety.
A2 noun /fɪlm ˈæktər/

film actor

Meaning
A person who performs roles in movies or films.
Example
The film actor received widespread acclaim for his performance.
B2 noun /ˈfækəlti/

faculty

Meaning
an inherent mental or physical ability; a division of a university
Example
She has a remarkable faculty for languages.
C1 verb /flɪntʃ/

flinch

Meaning
to suddenly move back or away due to fear or pain
Example
He didn’t flinch when the doctor gave him the injection.
B1 noun /ˈfɛloʊ/

fellow

Meaning
a person who shares a common situation, interest, or activity with another
Example
He is a fellow student in my class.
A2 noun /fæt/

Fat

Meaning
a natural oily substance occurring in animal bodies; lipid used in cooking
Example
Too much fat in your diet can be unhealthy.
A1 noun /fʌn/

fun

Meaning
enjoyment, amusement, or light-hearted pleasure
Example
We had a lot of fun at the party.
C1 noun /frɪndʒ/

fringe

Meaning
A decorative border of threads; the outer edge or margin of something.
Example
The festival had a fringe of small independent performances.
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 /ˈfʌŋkʃəˌnɛri/

functionary

Meaning
a person who has official duties in an organization, especially one with little authority
Example
The minor functionary was responsible for filing reports.
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.
C2 noun /ˈfræŋkɪnsɛns/

frankincense

Meaning
An aromatic gum resin used in incense and perfumes, often in religious ceremonies.
Example
The temple was filled with the sweet smell of burning frankincense.
B2 adjective /ˈfjʊə.ri.əs/

Furious

Meaning
extremely angry; violent; fierce;
Example
She was furious when she discovered the mistake.
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.
C1 verb /fɔːrˈɡoʊ/

forego

Meaning
to decide not to do or have something pleasant or valuable
Example
She decided to forego dessert to maintain her diet.
C1 verb /ˈfɜːr.tɪ.laɪz/

fertilize

Meaning
to make soil or land more fertile by adding substances
Example
Farmers fertilize the fields to increase crop yield.
C2 noun /ˈfetiʃ/

fetich

Meaning
an object believed to have magical powers or to be inhabited by a spirit
Example
The villagers treated the statue as a powerful fetich.
C1 verb ˈflʌk.tʃu.eɪt

fluctuate

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

fluvial

Meaning
relating to or found in a river
Example
The fluvial deposits indicated the presence of an ancient river system.
C2 noun /ˈfoʊ.li.oʊ/

folio

Meaning
A sheet of paper folded once to form two leaves (four pages) of a book; also a term for a large book or manuscript.
Example
The library houses an ancient Shakespeare folio.
C2 noun /ˈfɔːltˌfaɪndər/

faultfinder

Meaning
a person who habitually finds fault with others
Example
He is such a faultfinder that nothing anyone does is ever good enough.
B2 noun /ˈfreɪ.ɡrəns/

Fragrance

Meaning
a pleasant, sweet smell; a perfume or cologne
Example
The fragrance of jasmine flowers filled the entire garden in the evening.
C2 noun /ˈfʌriər/

furrier

Meaning
A person who prepares or deals in furs.
Example
The furrier displayed fine coats in his shop.
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.
B2 noun /faɪˈnæn.ʃəl rɪˌspɒn.sɪˈbɪl.ə.ti/

financial responsibility

Meaning
The practice of managing money and other financial resources in a responsible and effective manner.
Example
Financial responsibility ensures long-term economic stability.
C2 adjective /ˈfɛtɪd/

fetid

Meaning
having a strong, unpleasant smell
Example
The fetid smell from the garbage was unbearable.
C2 adverb /ˈfɔːrbi/

forby

Meaning
In addition; besides (archaic Scottish/English word).
Example
He is kind and generous, and wise forby.
A2 verb /friːz/

freeze

Meaning
to become solid due to cold; to preserve by cold
Example
Water freezes at zero degrees Celsius.
C1 noun ˌfræɡ.mənˈteɪ.ʃən

fragmentation

Meaning
The process or state of breaking or being broken into fragments.
Example
Habitat fragmentation threatens many species.
B2 noun /ˈfaɪ.bər/

fibre

Meaning
A thread or filament from which a vegetable tissue, mineral substance, or textile is formed; dietary material that aids digestion.
Example
Eating foods rich in fibre can improve your digestion.
B1 adjective /ˈfæsɪneɪtɪŋ/

Fascinating

Meaning
extremely interesting; captivating; enchanting
Example
The documentary about ocean life was fascinating.
B2 adjective, noun, verb /faʊl/

foul

Meaning
offensive to the senses; dirty or unpleasant; in sports, an unfair or illegal act
Example
The player was penalized for committing a foul.
A1 verb /faɪnd/

find

Meaning
to discover or locate something that was lost or hidden
Example
I can't find my keys anywhere.
B1 verb /ˈfɛri/

ferry

Meaning
to transport by boat; to carry back and forth
Example
The boat ferried passengers across the river.
C1 noun /ˈfæk.ʃən/

Faction

Meaning
a small organized dissenting group within a larger one
Example
Different factions within the party disagreed about the new policy.
C1 adjective /ˈflʌstərd/

flustered

Meaning
in a state of confusion or agitation
Example
She appeared flustered after being asked so many questions.
A2 verb /fərˈɡɪv/

forgive

Meaning
to stop feeling angry or resentful toward someone; to pardon
Example
She decided to forgive him for his mistakes.
B1 noun fləʊ

flow

Meaning
The action or fact of moving along in a steady, continuous stream
Example
The flow of information must be secured.
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.
B2 adjective /fəˈɡɪv.ɪŋ/

Forgiving

Meaning
ready and willing to forgive; merciful; lenient
Example
She has a forgiving nature and rarely holds grudges.
B2 adjective /ˈfʌsi/

fussy

Meaning
hard to please; very concerned with details
Example
The child is very fussy about what she eats.
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.
C1 verb /fɔrˈstɔl/

forestall

Meaning
to prevent by acting in advance; to anticipate and counter
Example
They forestalled the crisis by taking immediate action.
B2 noun ˈfrʌn.tɪərz

frontiers

Meaning
The extreme limit of settled land beyond which lies wilderness; the limits of knowledge or achievement in a particular field.
Example
The project pushes the frontiers of space exploration.
C1 adjective /ˈflæɡɪŋ/

flagging

Meaning
becoming tired, weaker, or less enthusiastic
Example
After hours of work, his energy was flagging.
C1 verb /ˈfɔːrfɪt/

forfeit

Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
C2 adjective /ˈfædɪʃ/

faddish

Meaning
Following a temporary trend or fashion
Example
Wearing neon clothes was a faddish style in the 1980s.
C2 adjective /ˈfæl.oʊ/

fallow

Meaning
Describing land that is left unplanted for a period to restore its fertility, allowing soil to recover nutrients and break pest and disease cycles.
Example
Farmers leave their fields fallow to restore soil fertility.
B1 noun fʌnd

fund

Meaning
A sum of money saved or made available for a particular purpose.
Example
The government allocated a fund for disaster relief.
C1 noun /ˈfoʊ.kəs ˈtræk.ɪŋ/

focus tracking

Meaning
A technique of monitoring and maintaining attention on specific tasks or goals.
Example
Proper focus tracking improves productivity.
A1 noun /ˈflaʊər/

flower

Meaning
the seed-bearing part of a plant, often colorful and fragrant, that blossoms
Example
The garden was full of colorful flowers.
B2 noun /ˈfrʌn.tɪər/

frontier

Meaning
A new area of activity, knowledge, or development; the edge of knowledge or achievement.
Example
Robotic surgery is exploring a new frontier in medicine.
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.
B2 noun /fʌs/

Fuss

Meaning
unnecessary worry or bother about something; agitated excitement over a trivial matter
Example
She made such a fuss about the small stain on her dress that everyone noticed.
B1 noun /ˈfaɪ.tər/

Fighter

Meaning
a military aircraft designed for attacking other aircraft; a person who fights
Example
The fighter jet flew overhead during the military parade.
B2 noun ˈfreɪm.wɜːks

frameworks

Meaning
A basic structure underlying a system, concept, or text; an essential supporting structure.
Example
Frameworks define the basis of systems.
B2 noun /ˈflɒrɪst/

florist

Meaning
A person who sells and arranges flowers.
Example
We bought a bouquet from the local florist.
B2 adjective /ˈfræntɪk/

frantic

Meaning
Extremely anxious, hurried, or out of control due to fear or excitement.
Example
She made a frantic call to her family after the accident.
C2 noun /ˈfʌstɪən/

fustian

Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
A2 adjective, noun /ˈfeɪvərɪt/

favorite

Meaning
Preferred over all others; something or someone especially liked.
Example
Chocolate is my favorite ice cream flavor.
C2 noun /ˈfoʊksl/

forecastle

Meaning
The forward part of a ship below the deck, traditionally used as living quarters for the crew.
Example
The sailors gathered in the forecastle after their shift.
B2 adverb /ˈfɜ:rst hænd/

First-hand

Meaning
directly experienced or obtained; from the original source
Example
I experienced the earthquake first-hand.
C2 verb /fɪˈneɪɡəl/

finagle

Meaning
to obtain something by cleverness or trickery
Example
He finagled a free ticket by pretending to be a VIP guest.
A2 adjective /fænˈtæstɪk/

Fantastic

Meaning
extremely good; wonderful; excellent
Example
The movie was absolutely fantastic!
C2 noun, verb /ˈfɪlɪˌbʌstər/

filibuster

Meaning
a tactic of delaying legislative action by prolonged speech; to use such a tactic
Example
The senator filibustered for hours to prevent the bill from passing.
C1 adjective /ˈfrɪvələs/

frivolous

Meaning
Not having any serious purpose or value; silly or unimportant.
Example
She dismissed the frivolous complaint quickly.
A1 noun /ˈfɛb.ruˌɛr.i/

february

Meaning
The second month of the year in the Gregorian calendar, typically having 28 days, or 29 in a leap year.
Example
My birthday is in February, so I always look forward to this month.
B1 noun /feɪθ/

Faith

Meaning
complete trust or confidence in someone or something; strong belief in religion
Example
She had unwavering faith in her team's ability to succeed.
A2 adjective /flæt/

flat

Meaning
Smooth and level, without raised areas or curves.
Example
The road ahead was completely flat.
C1 verb /ˈfɜːrmɛnt/

ferment

Meaning
to undergo a chemical process where sugars are converted to alcohol or acid; to incite or stir up change
Example
The grapes are left to ferment for several weeks.
C2 noun /ˈflɛdʒlɪŋ/

fledgeling

Meaning
A young bird that has just developed its feathers and is learning to fly; a beginner.
Example
The fledgeling was trying hard to take its first flight.
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 verb /fɔːrdʒ/

forge

Meaning
to create or shape something, often with effort or skill; also to counterfeit or fake something
Example
The blacksmith forged a strong sword from the iron.
A1 verb /fiːl/

Feel

Meaning
to experience an emotion or physical sensation; to touch something
Example
I feel happy when I see my friends.
C2 adjective /ˈfrɒθi/

frothy

Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
B2 noun/adjective /ˈfluːɪd/

fluid

Meaning
a substance that can flow easily, such as liquid or gas; smooth and adaptable
Example
The artist's fluid movements impressed the audience.
B1 noun, verb /flæɡ/

flag

Meaning
a piece of fabric with a symbol or colors; or to mark or signal attention
Example
They raised the national flag during the ceremony.
C1 adjective/noun /fəˈrɛns.ɪk/

forensic

Meaning
Scientific analysis applied to criminal or legal matters
Example
Forensic experts analyze cybercrimes using advanced tools.
C1 noun /ˈfɛtɪʃ/

fetish

Meaning
an excessive or irrational devotion to something
Example
He has a fetish for collecting rare stamps.
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.
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.
A2 noun /frʌnt/

front

Meaning
the forward-facing part of something
Example
The house has a garden in front.
B2 verb /feɪd/

fade

Meaning
To gradually lose brightness, color, or strength.
Example
The colors of the old photo have started to fade.
A2 verb /faʊnd/

found

Meaning
to establish or create something; to discover
Example
They founded the company in 1995.
C2 verb /ˈfɜːrbɪʃ/

furbish

Meaning
to polish, renovate, or give a fresh look to something
Example
The workers furbished the old sword until it gleamed like new.
A2 adjective /ˈfɔːrməl/

formal

Meaning
done in accordance with rules of convention or etiquette; official or serious in nature
Example
He wore a formal suit to the wedding.
A1 adjective /fɑːst/

Fast

Meaning
moving or happening quickly; rapid; swift
Example
She runs very fast in the morning.
B2 adjective /ˌfjuːtʃəˈrɪstɪk/

futuristic

Meaning
Having or involving very modern technology or design that is advanced beyond what is currently available
Example
Futuristic technologies are transforming industries worldwide.
A2 verb ˈfoʊkəs

focus

Meaning
To concentrate attention or effort on something; to direct one's attention or efforts towards a particular activity, subject, or problem.
Example
Focus on what truly matters to simplify your life.
C2 adjective /ˈfæsaɪl/

Facile

Meaning
easily achieved; superficial; lacking depth
Example
His facile explanation didn't address the real problem.
C1 adjective /fəˈnætɪk/

Fanatic

Meaning
extremely passionate about something; showing excessive enthusiasm or devotion
Example
He is a fanatic supporter of his football team.
C1 noun /ˈfiːtəs/

fetus

Meaning
an unborn or unhatched offspring in the womb or egg
Example
The doctor explained the development of the fetus during pregnancy.
C2 noun /ˌfoʊ.mənˈteɪ.ʃən/

fomentation

Meaning
The action of instigating or stirring up; also the application of warm substances to the body to ease pain.
Example
His speech led to the fomentation of violence in the region.
B2 noun /ˈfræɡ.mənt/

Fragment

Meaning
a small part broken or separated off something; an incomplete or isolated portion
Example
Archaeologists found fragments of ancient pottery buried in the soil.
B2 verb ˈfɔːr.mjə.leɪt

formulate

Meaning
To create or develop a plan or idea clearly and specifically, to construct an idea or strategy clearly.
Example
The company must formulate a strategy for expansion.
C2 verb /ˈfæmɪʃ/

famish

Meaning
to suffer or cause to suffer from extreme hunger
Example
The stranded hikers began to famish after several days without food.
C2 noun /flɛk/

fleck

Meaning
a small spot or mark, often of a different color
Example
There was a fleck of paint on the floor.
C1 adjective /fɪkˈtɪʃəs/

fictitious

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