fluctuate
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C1 verb ˈflʌk.tʃu.eɪt

fluctuate

Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
B2 adjective /ˈfjʊə.ri.əs/

Furious

Meaning
extremely angry; violent; fierce;
Example
She was furious when she discovered the mistake.
C2 noun /ˈfɔɪbəl/

foible

Meaning
A minor weakness or eccentricity in someone's character.
Example
She loved him despite his little foibles.
A1 adjective /fɑːst/

Fast

Meaning
moving or happening quickly; rapid; swift
Example
She runs very fast in the morning.
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
B2 noun /ˈfɒsɪl/

fossil

Meaning
the remains or impression of a prehistoric plant or animal embedded in rock
Example
The fossil of a dinosaur was discovered in the mountains.
C2 noun /fɪntʃ/

finch

Meaning
a small songbird with a short, stout bill
Example
A colorful finch perched on the branch singing sweetly.
C1 verb /ˈflaʊndər/

flounder

Meaning
To struggle or stagger clumsily; to experience difficulty or confusion.
Example
He floundered in the interview when asked difficult questions.
B2 noun /ˈfɜː.tɪ.laɪ.zər/

fertilizer

Meaning
a substance added to soil to make plants grow more successfully
Example
Farmers use fertilizer to increase crop production.
A1 noun ˈflaʊərz

Flowers

Meaning
The reproductive structures of plants that provide nectar for butterflies.
Example
Butterflies are attracted to colorful flowers.
B2 adverb /ˈfɔːrmərli/

Formerly

Meaning
in the past; previously; at an earlier time
Example
The building was formerly a school but is now a community center.
C2 adjective /fəˈloʊniəs/

felonious

Meaning
relating to or involved in serious criminal activity
Example
He was charged with felonious assault after the incident.
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.
B1 adjective /ˈfrʌstreɪtɪŋ/

frustrating

Meaning
causing annoyance or dissatisfaction
Example
The slow internet connection was really frustrating.
B2 noun /ˌfiː.ɑːnˈseɪ/

Fiance

Meaning
a man who is engaged to be married
Example
Sarah introduced her fiance to her parents during the family dinner.
C1 noun /ˈfɔːrsəm/

foursome

Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
B2 adjective /ˌfɔːrθˈkʌmɪŋ/

forthcoming

Meaning
about to happen soon; willing to share information
Example
The company announced its forthcoming product launch.
C1 verb /flɔːnt/

flaunt

Meaning
to show off something proudly, often to attract attention
Example
She likes to flaunt her new jewelry at parties.
C1 noun /fæd/

fad

Meaning
a temporary fashion or trend; a short-lived craze
Example
The new diet became a popular fad among teenagers.
A1 noun /ˈfraɪ.deɪ/

friday

Meaning
the day of the week following Thursday and preceding Saturday
Example
We have a team meeting every Friday afternoon.
B2 verb /flɜːrt/

flirt

Meaning
to behave as if you are attracted to someone, but not in a serious way
Example
She often flirts with her colleagues at work.
A2 adjective, noun /ˈfeɪvərɪt/

favorite

Meaning
Preferred over all others; something or someone especially liked.
Example
Chocolate is my favorite ice cream flavor.
B2 verb /ˈfæsən/

fasten

Meaning
To attach or secure something firmly in place
Example
Please fasten your seatbelt before the plane takes off.
A2 noun /ˈflaɪ.ɪŋ ˈkriː.tʃər/

Flying creature

Meaning
any animal that has the ability to fly through the air
Example
Birds, bats, and insects are all examples of flying creatures.
B2 noun /ˈfleɪ.vər/

Flavour

Meaning
the distinctive taste of a food or drink; a particular quality or atmosphere
Example
The soup had a rich flavour of herbs and spices from the garden.
A1 noun /fʌn/

fun

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

fuse

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

flue

Meaning
A pipe or channel for smoke and waste gases produced by a fire, gas heater, or power station.
Example
The chimney flue needs to be cleaned regularly.
B1 noun /ˈfʌŋkʃən/

function

Meaning
An activity or purpose natural to or intended for a person or thing.
Example
The main function of the heart is to pump blood.
A2 adjective /fɔːls/

False

Meaning
not true; incorrect; deceptive; artificial
Example
The witness gave false testimony in court.
C2 noun ˌfjuːmɪˈɡeɪʃən

fumigation

Meaning
The practice of disinfecting or purifying an area using gas or smoke.
Example
Fumigation is an effective method to control pest infestations.
C1 adjective /ˈfliː.tɪŋ/

fleeting

Meaning
Lasting for a very short time; passing quickly.
Example
Happiness can be fleeting, so cherish every moment.
B2 noun /fleɪm/

Flame

Meaning
a hot glowing body of ignited gas that is generated by something on fire
Example
The candle flame flickered gently in the evening breeze.
C2 adverb /ˈfɔːrbi/

forby

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

fancier

Meaning
a person who has a special interest in a particular thing or activity, especially animals or hobbies
Example
He is a fancier of rare birds.
A1 noun /faɪv/

five

Meaning
The number 5; one more than four and one less than six.
Example
She bought five apples from the market.
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.
B2 noun ˈfeɪs tə ˈfeɪs ˈbætl

face-to-face battle

Meaning
A direct confrontation or fight between opposing forces.
Example
The warriors fought a face-to-face battle with the enemies.
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 /ˈflɛkʃən/

flection

Meaning
The act of bending or the state of being bent, especially of a limb or joint.
Example
The doctor tested the patient's knee flection during the examination.
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.
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.
C2 noun /ˈfɜːrðərəns/

furtherance

Meaning
The advancement or promotion of something.
Example
The new policy was introduced in furtherance of social justice.
B2 noun /ˈfɪŋ.ɡər.prɪnt/

Fingerprint

Meaning
an impression or mark made on a surface by a person's fingertip; unique identification pattern
Example
The police found his fingerprints on the door handle at the crime scene.
B2 verb /feɪnt/

faint

Meaning
to lose consciousness for a short time because of a temporary lack of oxygen to the brain
Example
He felt dizzy and fainted in the heat.
C1 adjective /ˈfruː.ɡəl/

Frugal

Meaning
economical; thrifty;
Example
She is very frugal and saves money by buying only necessary items.
B1 verb /fərˈbɪd/

forbid

Meaning
to order someone not to do something
Example
The school forbids smoking on campus.
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.
C2 noun /feɪt/

fete

Meaning
a celebration or festival, often in honor of someone
Example
The village held a grand fete to celebrate the harvest.
C2 noun /ˈfɔːrʃɔːr/

foreshore

Meaning
The part of the shore between the high and low tide marks
Example
Children were playing on the foreshore, collecting shells.
C1 noun /ˈfʊtˌnoʊt/

foot-note

Meaning
A note of reference, explanation, or comment placed at the bottom of a page.
Example
The author included a foot-note to explain the historical context.
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.
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.
C2 adjective /ˈfluːviəl/

fluvial

Meaning
relating to or found in a river
Example
The fluvial deposits indicated the presence of an ancient river system.
B2 adjective /ˈfɪr.fəl/

fearful

Meaning
feeling afraid or showing fear
Example
She was fearful of walking alone at night.
C1 adjective /ˈflæɡɪŋ/

flagging

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

feasible

Meaning
possible to do easily or conveniently; practical and workable
Example
It is feasible to complete the project within two months.
C1 noun /ˈfen.jʊ.griːk/

Fenugreek

Meaning
an herb whose seeds and leaves are used as a spice in cooking
Example
Fenugreek seeds have a slightly bitter taste and are commonly used in Indian cuisine.
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 adjective /freɪl/

frail

Meaning
Physically weak and delicate.
Example
The old man was too frail to walk without help.
A2 adverb /ˈfaɪ.nəl.i/

Finally

Meaning
at last; after a long time; in the end; as the last point
Example
After years of hard work, she finally achieved her goal.
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 noun fəˈtɪl.ɪ.ti

fertility

Meaning
The quality of being fertile; fruitfulness.
Example
Fertility of the soil is crucial for farming.
A2 noun /frʌnt/

front

Meaning
the forward-facing part of something
Example
The house has a garden in front.
B1 adjective /ˈfæbjələs/

Fabulous

Meaning
extremely good; wonderful; extraordinary
Example
She wore a fabulous dress to the party.
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.
C2 adjective fəˈleɪ.ʃəs

fallacious

Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
B2 noun /ˈfjʊr.i/

Fury

Meaning
wild or violent anger; extreme intensity of emotion or activity
Example
His fury was evident when he discovered someone had stolen his bicycle.
C2 verb /ˈflʌməks/

flummox

Meaning
To confuse or bewilder someone completely.
Example
The complicated puzzle flummoxed the students.
C1 noun/adjective ˈflɛdʒ.lɪŋ

fledgling

Meaning
New, inexperienced, newly established.
Example
The fledgling startup needs investment.
C1 noun /fɔːrˈmæl.ə.ti/

Formality

Meaning
the rigid observance of rules of convention or etiquette; a thing done simply to comply with requirements
Example
The signing of the contract was just a formality; the deal was already agreed upon.
C2 noun /ˈflæɡ ˌɒfɪsər/

flag-officer

Meaning
a senior naval officer entitled to fly a flag to mark the command
Example
The flag-officer reviewed the fleet before the ceremony.
C2 noun /ˈfʊl.krəm/

fulcrum

Meaning
The point or support on which a lever pivots; a central or essential point of activity or support.
Example
The teacher became the fulcrum of change in the school.
C2 noun /ˈfriːˌθɪŋkər/

freethinker

Meaning
A person who forms opinions based on reason and independent thought rather than tradition or authority.
Example
Voltaire was considered a great freethinker of his time.
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.
B2 noun /ˈfluː.ən.si/

fluency

Meaning
The ability to speak or write a language smoothly and effortlessly.
Example
She speaks English with remarkable fluency.
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.
C2 adjective /ˈfiːkənd/

fecund

Meaning
producing or capable of producing an abundance of offspring or new growth; fertile
Example
The fecund soil produced a bountiful harvest this year.
B2 adjective /ˈfʌŋkʃənl/

functional

Meaning
designed to be practical and useful, rather than just decorative
Example
The design of the chair is simple but highly functional.
C1 noun /ˈfɛlən/

felon

Meaning
a person who has committed a serious crime
Example
The felon was sentenced to ten years in prison.
C1 adjective /ˈfjuː.dəl/

feudal

Meaning
relating to the system of feudalism, a medieval social system based on land ownership and obligations
Example
The castle is a remnant of the feudal era.
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 /ˈfaɪər.brænd/

firebrand

Meaning
a person who is passionate about a cause, often inciting change or action
Example
The activist was a true firebrand, inspiring everyone around him to join the protest.
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 /ˈfoʊliɪdʒ/

foliage

Meaning
The leaves of a plant, collectively.
Example
The autumn foliage looked stunning in the park.
C1 noun /ˈfɔːrˌfɑːðər/

forefather

Meaning
an ancestor, especially one who was part of an earlier generation of a family or nation
Example
Our forefathers fought for independence.
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.
C2 adjective /ˈfɒksi/

foxy

Meaning
Clever, cunning, or attractive.
Example
He came up with a foxy plan to win the game.
B2 noun /fluːt/

Flute

Meaning
a musical wind instrument with holes along its length that is played by blowing across a hole at one end
Example
He played a sweet melody on his flute.
A2 noun /frɒɡ/

Frog

Meaning
a small amphibian animal that lives both in water and on land
Example
The frog jumped from the lily pad into the pond.
B1 adverb /ˈfeər.li/

Fairly

Meaning
in a just manner; moderately; reasonably
Example
The test was fairly easy, but some questions were challenging.
B2 noun /ˈfɪlmˌmeɪkər/

filmmaker

Meaning
a person who makes films, typically as a profession
Example
He is a well-known filmmaker in the industry.
B2 noun/verb /flɑːk/

flock

Meaning
a group of birds or animals; to gather or move in a crowd
Example
Tourists flocked to the beach during summer.
C1 adjective /ˈflæʃi/

flashy

Meaning
ostentatious or showy in a way that attracts attention
Example
He drove a flashy sports car through the city streets.
A2 noun /ˈfiː.lɪŋ/

Feeling

Meaning
an emotional state or reaction; the capacity to experience physical sensations
Example
She had a strange feeling that something important was about to happen.
A2 noun /fɔːrk/

Fork

Meaning
a tool with two or more prongs used for eating or serving food
Example
Please use a fork to eat your salad.
A1 adjective /ˈfrɛndli/

friendly

Meaning
Kind and pleasant; showing goodwill and affection.
Example
The shop owner is very friendly to new customers.
C1 noun /ˈfæm.ɪn/

Famine

Meaning
extreme scarcity of food; a period when food is extremely scarce
Example
The severe drought led to widespread famine in the region.
B2 noun /ˈfɪlmˌmeɪkər/

film-maker

Meaning
A person who directs or produces films
Example
The film-maker received an award for his latest documentary.
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 /flaʊər/

Flour

Meaning
fine powder made by grinding wheat or other grains; used for making bread, cakes, and pastry
Example
She mixed flour with water to make dough for bread.
C2 adjective /ˈfɛtɪd/

fetid

Meaning
having a strong, unpleasant smell
Example
The fetid smell from the garbage was unbearable.
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 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.
C2 adjective /ˈfæn.sɪ.ləs/

fanciless

Meaning
without imagination or creativity; plain or ordinary
Example
His drawings were simple and fanciless.
A2 verb /fɪks/

fix

Meaning
To repair or make something work again.
Example
The mechanic fixed the broken car.
A2 number /ˈfɪfti/

fifty

Meaning
the number 50
Example
The stadium can hold fifty thousand people.
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.
B1 noun/verb /ˈfaɪtɪŋ/

fighting

Meaning
the act of engaging in a physical or verbal conflict
Example
The soldiers were fighting bravely on the battlefield.
A2 noun /fluː/

flu

Meaning
a contagious viral illness causing fever, aches, and respiratory symptoms; influenza
Example
She stayed home because she had the flu.
A2 adjective, adverb /ˈfæstər/

faster

Meaning
moving or able to move quickly; more quickly than usual
Example
This car is faster than the old one.
C1 adjective /ˈfrɪvələs/

frivolous

Meaning
Not having any serious purpose or value; silly or unimportant.
Example
She dismissed the frivolous complaint quickly.
A2 adjective /ˈfuː.lɪʃ/

Foolish

Meaning
lacking good sense or judgment; unwise; silly
Example
It was foolish of him to drive in such heavy rain.
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.
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.
C1 adjective ˈfæʃ.ɪst

fascist

Meaning
Relating to or characteristic of fascism; extremely authoritarian.
Example
Fascist governance undermines freedom.