fluctuate
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C1 verb ˈflʌk.tʃu.eɪt

fluctuate

fluctuer
Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
Les prix des actions fluctuent en raison des conditions du marché.
C1 noun /fruːˈɡæl.ə.ti/

frugality

frugalité
Meaning
The quality of being economical in use or expenditure; not wasteful.
Example
Frugality is essential for saving money effectively.
La frugalité est essentielle pour économiser de l'argent efficacement.
C1 noun /frɪndʒ/

fringe

bordure décorative / marge
Meaning
A decorative border of threads; the outer edge or margin of something.
Example
The festival had a fringe of small independent performances.
Le festival avait une marge de petites performances indépendantes.
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

fragilité
Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
La fragilité de la cornée augmente avec le frottement.
C1 adverb /ˈfeɪ.təl.i/

Fatally

fatalement
Meaning
in a way that causes death; with deadly consequences; critically
Example
The accident fatally injured two passengers.
L'accident a blessé deux passagers de manière fatale.
C1 noun /fɪlθ/

filth

saleté
Meaning
dirty or disgusting matter; moral corruption
Example
The streets were full of filth after the storm.
Les rues étaient pleines de saleté après la tempête.
C1 adjective /ˈfɑːð.ər.ləs/

fatherless

orphelin de père
Meaning
without a father
Example
The fatherless child relied on the support of his community.
L'enfant orphelin de père comptait sur le soutien de sa communauté.
C1 noun ˌfiː.zəˈbɪl.ə.ti

feasibility

faisabilité
Meaning
The state or degree of being easily or conveniently done; possibility.
Example
The company conducted a feasibility study before launching the project.
L'entreprise a mené une étude de faisabilité avant de lancer le projet.
C1 verb /ˈfrɒlɪk/

frolic

jouer joyeusement
Meaning
to play and move about cheerfully, energetically, or playfully
Example
The children frolicked in the garden all afternoon.
Les enfants ont joué joyeusement dans le jardin toute l'après-midi.
C1 noun ˈfæl.ə.si

fallacy

fallacie, erreur, raisonnement incorrect
Meaning
False belief, misconception, false reasoning.
Example
The idea that success comes easy is a fallacy.
L'idée que le succès vient facilement est une fallacie.
C1 noun /ˈfaɪər.wɔːl/

firewall

pare-feu
Meaning
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Example
A firewall protects networks from cyber-attacks.
Un pare-feu protège les réseaux des cyberattaques.
C1 verb, noun /ˈflʌstər/

fluster

embrouiller
Meaning
to make someone agitated or confused
Example
The unexpected question flustered him.
La question inattendue l'a embrouillé.
C1 noun/verb /fliːs/

fleece

la laine de mouton
Meaning
The woolly covering of a sheep; as a verb, to swindle or cheat someone.
Example
The farmer sheared the sheep’s fleece carefully.
Le fermier a soigneusement tondu la laine de la brebis.
C1 adjective /fəˈroʊ.ʃəs/

Ferocious

féroce, sauvage, cruel
Meaning
savagely fierce, cruel, or violent; extremely aggressive
Example
The ferocious storm destroyed many houses in the coastal area.
La tempête féroce a détruit de nombreuses maisons dans la zone côtière.
C1 noun /ˈfɔːrɡraʊnd/

foreground

premier plan
Meaning
the part of a scene that is nearest to and in front of the viewer
Example
The flowers in the foreground brightened the picture.
Les fleurs au premier plan ont illuminé l'image.
C1 noun /ˈfɔːls.hʊd/

Falsehood

fausseté; mensonge
Meaning
the state of being untrue; a lie
Example
The politician was caught spreading falsehoods about his opponent.
Le politicien a été pris en train de répandre des faussetés à propos de son adversaire.
C1 noun /fəˈtæləti/

fatality

fatalité
Meaning
An occurrence of death by accident, disaster, or violence.
Example
The accident resulted in one fatality.
L'accident a entraîné une fatalité.
C1 noun /ˈfoʊ.kəs ˈtræk.ɪŋ/

focus tracking

suivi de la concentration
Meaning
A technique of monitoring and maintaining attention on specific tasks or goals.
Example
Proper focus tracking improves productivity.
Un bon suivi de la concentration améliore la productivité.
C1 adjective/noun /fəˈrɛns.ɪk/

forensic

Analyse scientifique appliquée aux affaires criminelles ou juridiques
Meaning
Scientific analysis applied to criminal or legal matters
Example
Forensic experts analyze cybercrimes using advanced tools.
Les experts médico-légaux analysent les cybercrimes en utilisant des outils avancés.
C1 noun /ˈflæt.ər.i/

Flattery

flatterie
Meaning
excessive and insincere praise, given especially to further one's own interests
Example
His constant flattery made everyone suspicious of his true motives.
Sa flatterie constante a poussé tout le monde à douter de ses véritables intentions.
C1 verb /ˈfʌmbəl/

fumble

brouiller
Meaning
to handle something clumsily or to make mistakes while doing something
Example
He fumbled with the keys and dropped them on the floor.
Il a trébuché avec les clés et les a laissées tomber par terre.
C1 adjective /ˌfɑːrˈfɛtʃt/

far-fetched

farfelu
Meaning
unlikely to happen or be true; improbable
Example
His explanation for being late was a bit far-fetched.
Son explication pour être en retard était un peu farfelue.
C1 adjective ˈflʌd proʊn

flood-prone

sujette aux inondations
Meaning
Susceptible to flooding; likely to experience floods frequently.
Example
Bangladesh is a flood-prone deltaic nation.
Le Bangladesh est une nation deltaïque sujette aux inondations.
C1 adjective /ˈfɔːrsəbl/

forcible

forcé
Meaning
Done by force; using physical strength or power.
Example
The police made a forcible entry into the house.
La police a fait une entrée forcée dans la maison.
C1 verb /flɔːnt/

flaunt

fanfaronner
Meaning
to show off something proudly, often to attract attention
Example
She likes to flaunt her new jewelry at parties.
Elle aime fanfaronner ses nouveaux bijoux lors des soirées.
C1 verb /ˈfæbrɪkeɪt/

fabricate

fabriquer
Meaning
to invent or concoct something, often with the intent to deceive; or to construct or manufacture
Example
The witness fabricated his testimony to protect himself.
Le témoin a fabriqué son témoignage pour se protéger.
C1 noun /ˈfɔːrˌbɛər/

forebear

ancêtre
Meaning
An ancestor, especially one who lived a long time ago.
Example
He often speaks of his forebears with great respect.
Il parle souvent de ses ancêtres avec beaucoup de respect.
C1 adjective /ˈfɪɡərətɪv/

figurative

figuré
Meaning
not literal; using figures of speech or symbolic representation
Example
She used figurative language to describe her feelings.
Elle a utilisé un langage figuré pour décrire ses sentiments.
C1 noun /ˈfɔːr.teɪ/ or /fɔːrt/

forte

talent
Meaning
a strong ability or talent; something one does particularly well
Example
Cooking is definitely her forte.
La cuisine est définitivement son talent.
C1 noun /fɔːrˈkloʊʒər/

foreclosure

saisie immobilière
Meaning
The legal process by which a lender takes control of a property from a borrower who has failed to make payments.
Example
The family lost their home due to foreclosure after missing several mortgage payments.
La famille a perdu sa maison à cause de la saisie immobilière après avoir manqué plusieurs paiements hypothécaires.
C1 verb /fɔːrˈkloʊz/

foreclose

saisir
Meaning
to take possession of a property due to the owner's failure to keep up mortgage payments
Example
The bank decided to foreclose on the property after months of missed payments.
La banque a décidé de saisir la propriété après plusieurs mois de paiements manqués.
C1 adjective /ˈfrɪvələs/

frivolous

frivole
Meaning
Not having any serious purpose or value; silly or unimportant.
Example
She dismissed the frivolous complaint quickly.
Elle a rapidement rejeté la plainte frivole.
C1 noun /ˈfɔː.nə/

fauna

la vie animale d'une région particulière
Meaning
The animal life of a particular region, habitat, or geological period.
Example
The fauna of the African savannah includes lions and elephants.
La faune de la savane africaine comprend des lions et des éléphants.
C1 adjective fæsˈtɪd.i.əs

fastidious

méticuleux
Meaning
Very attentive to and concerned about accuracy and detail.
Example
She is fastidious about maintaining cleanliness.
Elle est méticuleuse en ce qui concerne le maintien de la propreté.
C1 adjective /ˈfiːzəbl/

feasible

réalisable
Meaning
possible to do easily or conveniently; practical and workable
Example
It is feasible to complete the project within two months.
Il est réalisable de terminer le projet en deux mois.
C1 noun /ˈfɔːrˌrʌnər/

forerunner

précurseur
Meaning
A person or thing that comes before another; a predecessor or harbinger.
Example
The Wright brothers were the forerunners of modern aviation.
Les frères Wright étaient les précurseurs de l'aviation moderne.
C1 noun /ˈfænsiər/

fancier

amateur
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.
Il est un amateur d'oiseaux rares.
C1 noun /foʊ/

foe

ennemi
Meaning
an enemy or opponent
Example
The knight fought bravely against his foe.
Le chevalier a combattu courageusement contre son ennemi.
C1 adjective /fərˈlɔːrn/

forlorn

désespéré, triste
Meaning
extremely sad, lonely, or abandoned
Example
The abandoned puppy looked so forlorn in the rain.
Le chiot abandonné avait l'air si triste sous la pluie.
C1 noun /ˈfɔːrˌbɛərz/

forebears

ancêtres
Meaning
Ancestors or people in previous generations from whom one is descended.
Example
We must honor the traditions of our forebears.
Nous devons honorer les traditions de nos ancêtres.
C1 noun (plural of fungus) /ˈfʌndʒaɪ/

fungi

champignon
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.
Les champignons jouent un rôle important dans la dégradation de la matière organique dans la nature.
C1 noun/verb /ˈfʌrəʊ/

furrow

sillon
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.
L'agriculteur a tracé des sillons dans le champ.
C1 adjective /ˈfuːlpruːf/

foolproof

infaillible
Meaning
Designed to be very easy to use or understand, leaving no possibility of failure or error.
Example
The new software has a foolproof installation process.
Le nouveau logiciel a un processus d'installation infaillible.
C1 noun /ˈfɔːrsəm/

foursome

quatuor
Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
Le quatuor a apprécié une partie de golf ensemble.
C1 verb /ˈfɛdərət/

federate

fédérer
Meaning
to unite in a league or federation; to form an alliance
Example
Several states federated to create a stronger union.
Plusieurs États se sont fédérés pour créer une union plus forte.
C1 noun /ˈfoʊliɪdʒ/

foliage

feuillage
Meaning
The leaves of a plant, collectively.
Example
The autumn foliage looked stunning in the park.
Le feuillage d'automne était impressionnant dans le parc.
C1 adjective ˈfɔːr.mɪ.də.bəl

formidable

formidable
Meaning
Inspiring fear or respect through being impressively large, powerful, intense, or capable.
Example
The boxer was a formidable opponent in the ring.
Le boxeur était un adversaire formidable sur le ring.
C1 adjective /ˈfjuː.dəl/

feudal

féodal
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.
Le château est un vestige de l'époque féodale.
C1 noun /ˈfɔɪeɪr/

foyer

hall d'entrée
Meaning
An entrance hall or lobby in a building.
Example
The guests waited in the hotel foyer before checking in.
Les invités ont attendu dans le hall de l'hôtel avant de s'enregistrer.
C1 adverb /ˈfɪksɪdli/

Fixedly

fixement
Meaning
in a steady, unmoving manner; with intense concentration
Example
He stared fixedly at the painting.
Il regardait fixement la peinture.
C1 noun /frɪˈvɒləti/

frivolity

frivolité
Meaning
Lack of seriousness; silly or trivial behavior.
Example
The teacher discouraged frivolity during the exam.
Le professeur a découragé la frivolité pendant l'examen.
C1 adjective ˈfæʃ.ɪst

fascist

fasciste
Meaning
Relating to or characteristic of fascism; extremely authoritarian.
Example
Fascist governance undermines freedom.
Le gouvernement fasciste sape la liberté.
C1 adjective /frɔːt/

fraught

chargé
Meaning
Filled with or likely to result in something undesirable.
Example
The negotiations were fraught with tension and uncertainty.
Les négociations étaient chargées de tension et d'incertitude.
C1 noun ˈfɔː.saɪt

foresight

prévision
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.
Sa prévision a aidé l'entreprise à éviter des pertes financières.
C1 adjective /fɪkˈtɪʃəs/

fictitious

fictif, faux
Meaning
not real or true; imaginary or fabricated
Example
The story he told was entirely fictitious.
L'histoire qu'il a racontée était entièrement fictive.
C1 adjective /ˈfɔːrmətɪv/

formative

formateur
Meaning
Having a lasting influence on a person's development or character.
Example
Childhood is often described as a formative stage in life.
L'enfance est souvent décrite comme une étape formatrice dans la vie.
C1 noun /ˈfʊtˌnoʊt/

foot-note

note de bas de page
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.
L'auteur a inclus une note de bas de page pour expliquer le contexte historique.
C1 verb /ˈfɔːltər/

falter

hésiter ou perdre de la force ou de l'élan
Meaning
to hesitate or lose strength or momentum
Example
Her voice faltered as she delivered the speech.
Sa voix a faibli lorsqu'elle a prononcé son discours.
C1 verb /flaʊt/

flout

mépriser
Meaning
To openly disregard or show contempt for a rule or law.
Example
The company was fined for flouting environmental regulations.
L'entreprise a été condamnée à une amende pour avoir enfreint les réglementations environnementales.
C1 adjective /ˈflæɡɪŋ/

flagging

faiblir, se fatiguer ou perdre de l'enthousiasme
Meaning
becoming tired, weaker, or less enthusiastic
Example
After hours of work, his energy was flagging.
Après des heures de travail, son énergie était en baisse.
C1 noun /ˈfæk.ʃən/

Faction

faction
Meaning
a small organized dissenting group within a larger one
Example
Different factions within the party disagreed about the new policy.
Différentes factions au sein du parti étaient en désaccord sur la nouvelle politique.
C1 noun /ˈfɔːrˌfɑːðər/

forefather

ancêtre
Meaning
an ancestor, especially one who was part of an earlier generation of a family or nation
Example
Our forefathers fought for independence.
Nos ancêtres ont lutté pour l'indépendance.
C1 adjective /ˈfrɛn.zid/

frenzied

frenétique
Meaning
Wildly excited or uncontrolled
Example
The frenzied crowd cheered as the band took the stage.
La foule frénétique a acclamé lorsque le groupe monta sur scène.
C1 noun /ˈfrek.əl/

Freckle

tache de rousseur
Meaning
a small brownish spot on the skin, often becoming more pronounced through exposure to the sun
Example
Her face was covered with cute freckles that appeared every summer.
Son visage était couvert de jolies taches de rousseur qui apparaissaient chaque été.
C1 noun/adjective ˈflɛdʒ.lɪŋ

fledgling

novice, inexpérimenté, nouvellement établi
Meaning
New, inexperienced, newly established.
Example
The fledgling startup needs investment.
La startup novice a besoin d'investissement.
C1 verb /ˈfɜːrmɛnt/

ferment

subir un processus chimique où les sucres sont transformés en alcool ou en acide; inciter ou provoquer un changement
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.
Les raisins sont laissés à fermenter pendant plusieurs semaines.
C1 noun /fɪkˈseɪ.ʃən/

fixation

fixation ou intérêt obsessionnel pour quelque chose ou quelqu'un
Meaning
An obsessive interest in or feeling about someone or something.
Example
His fixation on perfectionism delayed project completion.
Sa fixation sur le perfectionnisme a retardé l'achèvement du projet.
C1 noun /fæd/

fad

mode passagère, tendance
Meaning
a temporary fashion or trend; a short-lived craze
Example
The new diet became a popular fad among teenagers.
Le nouveau régime est devenu une mode passagère chez les adolescents.
C1 noun /fɪˈnɛs/

finesse

subtilité, habileté, raffinement
Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
L'artiste a peint avec une grande finesse.
C1 verb /ˈfɔːlsɪfaɪ/

falsify

falsifier
Meaning
to make something false or to misrepresent
Example
He tried to falsify the documents to avoid taxes.
Il a essayé de falsifier les documents pour éviter les impôts.
C1 noun /ˈfɛlən/

felon

criminel
Meaning
a person who has committed a serious crime
Example
The felon was sentenced to ten years in prison.
Le criminel a été condamné à dix ans de prison.
C1 verb /fɔːrˈtɛl/

foretell

prédire
Meaning
to predict or announce something before it happens
Example
The old man claimed he could foretell the future.
L'homme âgé a affirmé qu'il pouvait prédire l'avenir.
C1 verb /flɪntʃ/

flinch

reculer
Meaning
to suddenly move back or away due to fear or pain
Example
He didn’t flinch when the doctor gave him the injection.
Il n'a pas bronché lorsque le docteur lui a donné l'injection.
C1 noun /ˈfɔːrdʒər/

forger

falsificateur
Meaning
a person who makes fake documents, artworks, or signatures
Example
The police arrested a forger who had been selling counterfeit paintings.
La police a arrêté un falsificateur qui vendait des peintures contrefaites.
C1 noun /fɔːrˈmæl.ə.ti/

Formality

formalités
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.
La signature du contrat n'était qu'une formalité; l'accord était déjà conclu.
C1 verb /fɔːrˈseɪk/

forsake

abandonner
Meaning
to abandon or give up something or someone
Example
He decided not to forsake his old friends despite his success.
Il a décidé de ne pas abandonner ses vieux amis malgré son succès.
C1 adjective /fəˈnætɪk/

Fanatic

fanatique
Meaning
extremely passionate about something; showing excessive enthusiasm or devotion
Example
He is a fanatic supporter of his football team.
Il est un fanatique supporter de son équipe de football.
C1 verb /fɔːˈbɛər/

forbear

s'abstenir
Meaning
To refrain from doing something; to show patience or self-control.
Example
She forbore from commenting on his mistake.
Elle s'est abstenue de commenter son erreur.
C1 noun /ˈfɔːrdʒəri/

forgery

falsification
Meaning
the crime of making fake documents, money, or artworks
Example
The bank detected a forgery in the signature on the cheque.
La banque a détecté une falsification dans la signature sur le chèque.
C1 noun /fɪˈnɑːleɪ/

finale

final
Meaning
the last part or conclusion of a performance, event, or series
Example
The concert ended with a spectacular finale.
Le concert s'est terminé par un final spectaculaire.
C1 adjective /ˈfænsiːd/

fancied

imaginé, désiré
Meaning
imagined, desired, or believed without evidence
Example
He is a fancied suitor in the eyes of the young lady.
Il est un prétendant imaginé aux yeux de la jeune fille.
C1 noun /ˈfɛərˌɡraʊndz/

fairgrounds

terrain de foire
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.
La ville a installé des manèges et des stands sur le terrain de foire pour le festival annuel.
C1 noun /fɑːrs/

farce

farce
Meaning
a comic dramatic work using buffoonery and horseplay, or a ridiculous situation
Example
The meeting turned into a complete farce with everyone arguing.
La réunion est devenue une vraie farce avec tout le monde qui se disputait.
C1 noun /ˈfæs.ɪt/

facet

facette, aspect, partie
Meaning
One of the many aspects or features of something; a particular part or element of something.
Example
Every facet of the project was carefully analyzed.
Chaque facette du projet a été soigneusement analysée.
C1 verb /ˈflɪk.ər/

flicker

clignoter
Meaning
to shine unsteadily or waver between light and dark
Example
The candle flickered in the wind.
La bougie clignotait dans le vent.
C1 noun /ˈfɪʃ.ər/

fissure

fissure
Meaning
a long, narrow opening or crack in a surface or object
Example
The earthquake caused a deep fissure in the road.
Le tremblement de terre a provoqué une fissure profonde dans la route.
C1 adjective /ˈfɜːrtɪv/

furtive

furtif
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.
Il lança un regard furtif vers la porte avant de partir.
C1 adjective /ˈfɪs.kəl/

fiscal

fiscal
Meaning
Relating to government revenue, especially taxes, or public money management.
Example
The government introduced new fiscal policies to control inflation.
Le gouvernement a introduit de nouvelles politiques fiscales pour contrôler l'inflation.
C1 adjective /ˈfræɡməntɪd/

fragmented

fragmenté, divisé, incomplet
Meaning
Having been broken into fragments; disjointed or incomplete.
Example
The information was fragmented and difficult to understand.
L'information était fragmentée et difficile à comprendre.
C1 noun /ˈfæm.ɪn/

Famine

famine
Meaning
extreme scarcity of food; a period when food is extremely scarce
Example
The severe drought led to widespread famine in the region.
La grave sécheresse a provoqué une famine généralisée dans la région.
C1 verb /ˈfɔːrfɪt/

forfeit

perdre, renoncer comme pénalité
Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
Il a dû abandonner le match après avoir enfreint les règles.
C1 noun /fəˈrɒs.ə.ti/

ferocity

férocité, violence, intensité
Meaning
The state or quality of being ferocious; extreme fierceness or violence.
Example
The storm's ferocity was devastating.
La férocité de la tempête était dévastatrice.
C1 adjective /ˈfruːt.ləs/

Fruitless

inutile; vain; futile;
Meaning
unsuccessful; futile; pointless;
Example
After hours of searching, their efforts proved fruitless.
Après des heures de recherche, leurs efforts se sont avérés inutiles.
C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

tolérance aux pannes
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.
La tolérance aux pannes assure des systèmes fiables.
C1 adjective + noun ˈfeɪvərəbəl klaɪˈmætɪk kənˈdɪʃənz

favorable climatic conditions

conditions climatiques favorables
Meaning
Weather conditions that are suitable and beneficial for growth or development
Example
Winter offers favorable climatic conditions for farming.
L'hiver offre des conditions climatiques favorables à l'agriculture.
C1 noun /fəˈsɑːd/

facade

façade
Meaning
The front of a building; a false or superficial appearance
Example
The building's glass facade reflected the sunset.
La façade en verre du bâtiment reflétait le coucher du soleil.
C1 noun, verb /ˈfɜːrloʊ/

furlough

congé temporaire
Meaning
temporary leave of absence from work, especially that granted to an employee or soldier
Example
Many workers were placed on furlough during the crisis.
De nombreux travailleurs ont été mis en congé pendant la crise.
C1 noun /ˈfɔːrmən/

foreman

personne en charge d'un groupe de travailleurs, en particulier dans une usine ou sur un chantier
Meaning
a person in charge of a group of workers, especially in a factory or construction site
Example
The foreman supervised the workers on the construction site.
Le chef de chantier a supervisé les ouvriers sur le site de construction.
C1 noun /ˈflæn.əl/

Flannel

flanelle
Meaning
a soft woven fabric, typically made of wool or cotton and slightly milled and raised
Example
He wore a warm flannel shirt in winter.
Il portait une chemise en flanelle chaude en hiver.
C1 noun /fruˈɪʃən/

fruition

réalisation
Meaning
The realization or fulfillment of a plan, project, or desire.
Example
Her dream of becoming a doctor finally came to fruition.
Son rêve de devenir médecin s'est enfin réalisé.
C1 verb /ˈflaʊndər/

flounder

tituber
Meaning
To struggle or stagger clumsily; to experience difficulty or confusion.
Example
He floundered in the interview when asked difficult questions.
Il a échoué dans l'entretien lorsqu'on lui a posé des questions difficiles.
C1 noun /flæt fɪʃ/

Flat fish

poisson plat
Meaning
a type of fish with a flattened body that lives on the sea floor
Example
Flat fish like sole and flounder are excellent for grilling.
Les poissons plats comme la sole et la limande sont excellents pour le grill.
C1 noun ˌfræɡ.mənˈteɪ.ʃən

fragmentation

fragmentation
Meaning
The process or state of breaking or being broken into fragments.
Example
Habitat fragmentation threatens many species.
La fragmentation de l'habitat menace de nombreuses espèces.
C1 noun /ˈfjuː.də.lɪ.zəm/

feudalism

féodalisme
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.
Le féodalisme a façonné la structure politique de l'Europe médiévale.
C1 noun, verb /fɔːrd/

ford

gué
Meaning
A shallow place in a river where one can cross; to cross a river at such a place.
Example
The travelers decided to ford the river at dawn.
Les voyageurs ont décidé de traverser la rivière par un gué à l'aube.
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

futuriste
Meaning
A person who studies or predicts the future, especially trends in science, technology, or society.
Example
The futurist predicted major changes in transportation within the next decade.
Le futuriste a prédit d'importants changements dans les transports au cours de la prochaine décennie.
C1 noun /ˈfjʊərɔːr/

furor

tumulte
Meaning
An outbreak of public anger or excitement.
Example
The politician's remarks created a furor in the media.
Les remarques du politicien ont créé un furor dans les médias.
C1 adjective /ˈflɪmzi/

flimsy

fragile
Meaning
weak, fragile, or lacking in strength; not convincing
Example
The chair was too flimsy to support his weight.
La chaise était trop fragile pour supporter son poids.
C1 adjective /ˈfliː.tɪŋ/

fleeting

éphémère
Meaning
Lasting for a very short time; passing quickly.
Example
Happiness can be fleeting, so cherish every moment.
Le bonheur peut être éphémère, alors chérissez chaque moment.
C1 adjective /ˈfɪk.əl/

Fickle

changeant; instable; capricieux;
Meaning
changeable; inconstant; liable to sudden unpredictable change
Example
His fickle nature made it hard to trust his promises.
Sa nature changeante a rendu difficile la confiance dans ses promesses.
C1 adjective /flæmˈbɔɪənt/

flamboyant

flamboyant, coloré ou confiant
Meaning
showy, strikingly bold or colorful; confident and lively
Example
His flamboyant style drew everyone's attention at the party.
Son style flamboyant a attiré l'attention de tout le monde à la fête.
C1 noun fluˈɪd.ɪ.ti

fluidity

fluidité
Meaning
The ability of a substance to flow easily; smooth and graceful movement or style.
Example
The fluidity of the dancer's movements was mesmerizing.
La fluidité des mouvements de la danseuse était envoûtante.
C1 adjective /fəˈnætɪkəl/

fanatical

fanatique
Meaning
showing extreme enthusiasm or obsession
Example
She has a fanatical interest in collecting vintage stamps.
Elle a un intérêt fanatique pour la collection de timbres anciens.
C1 noun/adjective /fɔːrˈboʊdɪŋ/

foreboding

présage inquiétant
Meaning
A feeling that something bad will happen; ominous.
Example
She felt a deep sense of foreboding as she entered the abandoned house.
Elle ressentit une profonde sensation de présage inquiétant en entrant dans la maison abandonnée.
C1 noun /ˈfræk.tʃər/

Fracture

fracture; cassure d'os
Meaning
the cracking or breaking of a hard object or material; a break in a bone
Example
The doctor confirmed that he had a hairline fracture in his wrist.
Le docteur a confirmé qu'il avait une fracture du poignet.
C1 adjective ˈfjuː.taɪl

futile

futile
Meaning
Incapable of producing any useful result; pointless.
Example
His attempts to change the situation were futile.
Ses tentatives de changer la situation étaient futiles.
C1 noun /ˈfren.zi/

Frenzy

frénésie
Meaning
a state or period of uncontrolled excitement or wild behavior; intense activity
Example
The announcement of the sale created a shopping frenzy at the mall.
L'annonce de la vente a créé une frénésie de shopping au centre commercial.
C1 noun /fjuːd/

feud

querelle, inimitié
Meaning
a prolonged and bitter quarrel or conflict, often between families or groups
Example
The two families have been in a feud for generations.
Les deux familles sont en conflit depuis des générations.
C1 noun /flʌks/

flux

flux
Meaning
continuous change or movement; the rate of flow of something
Example
The company was in a state of constant flux during the reorganization.
L'entreprise était dans un état de flux constant pendant la réorganisation.
C1 verb /fɔːrˈʃædoʊ/

foreshadow

présager
Meaning
To indicate or suggest something that will happen in the future
Example
Dark clouds foreshadowed an approaching storm.
Les nuages sombres ont présagé une tempête imminente.
C1 noun ˈfɜːr.vɚ

fervor

passion ou enthousiasme
Meaning
Strong passion or enthusiasm for something.
Example
He spoke with great fervor about his vision for the company.
Il a parlé avec beaucoup de ferveur de sa vision pour l'entreprise.