fluster
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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 /ˈfrænʧaɪz/

franchise

franchise
Meaning
A legal right to sell or distribute goods or services in a specific area; to grant such a right.
Example
He opened a new fast-food franchise in the city.
Il a ouvert une nouvelle franchise de restauration rapide dans la ville.
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 noun /ˈfen.jʊ.griːk/

Fenugreek

fenugrec
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.
Les graines de fenugrec ont un goût légèrement amer et sont couramment utilisées dans la cuisine indienne.
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 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 /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 /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 /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 /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 verb /fɔːrˈɡoʊ/

forego

renoncer
Meaning
to decide not to do or have something pleasant or valuable
Example
She decided to forego dessert to maintain her diet.
Elle a décidé de renoncer au dessert pour maintenir son régime.
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.
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 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 /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 /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 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 /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/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 adjective /frəˈnɛtɪk/

frenetic

frenétique
Meaning
Fast and energetic in a wild or uncontrolled way.
Example
The stock market experienced frenetic trading after the announcement.
Le marché boursier a connu des transactions frénétiques après l'annonce.
C1 verb /feɪn/

feign

feindre, simuler
Meaning
to pretend or fake; to give a false appearance of
Example
She feigned illness to avoid going to work.
Elle a feint d'être malade pour éviter d'aller au travail.
C1 adjective /ˈfrɪdʒɪd/

Frigid

glacial; froid intense
Meaning
extremely cold; freezing; icy
Example
The frigid weather made it difficult to go outside.
Le temps glacial rendait difficile de sortir dehors.
C1 verb /fɔrˈstɔl/

forestall

prévenir à l'avance
Meaning
to prevent by acting in advance; to anticipate and counter
Example
They forestalled the crisis by taking immediate action.
Ils ont évité la crise en prenant des mesures immédiates.
C1 noun /fəˈnætɪsɪzəm/

fanaticism

fanatisme
Meaning
the quality of being fanatical; extreme zeal or obsession
Example
Religious fanaticism can lead to intolerance and conflict.
Le fanatisme religieux peut mener à l'intolérance et au conflit.
C1 noun/verb ˈfɒr.ɪdʒ

forage

fourrage, chercher de la nourriture
Meaning
Food for horses and cattle, especially dried hay or feed; to search for food.
Example
Animals forage for food during the winter months.
Les animaux cherchent leur nourriture pendant les mois d'hiver.
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 /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 /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 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 /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 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 /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 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 verb /ˈflʌtər/

flutter

battre des ailes / trembler
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.
Le papillon a commencé à battre des ailes sous le soleil.
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 /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 /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 noun /ˈfʌŋɡəs/

fungus

champignon
Meaning
a spore-producing organism feeding on organic matter, including molds, yeast, and mushrooms
Example
A strange fungus was growing on the old tree.
Un étrange champignon poussait sur l'arbre ancien.
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 noun ˌfɜːr.tɪ.laɪˈzeɪ.ʃən

fertilization

fertilisation
Meaning
The process of adding nutrients to soil to increase crop productivity.
Example
Organic fertilization enhances soil health.
La fertilisation organique améliore la santé du sol.
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 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 /fiːt/

feat

exploit
Meaning
an achievement that requires great courage, skill, or strength
Example
Climbing Mount Everest was a remarkable feat.
Gravir le mont Everest fut un exploit remarquable.
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 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 noun /fɔːn/

Fawn

faon
Meaning
a young deer; a light yellowish-brown color
Example
The mother deer protects her fawn from predators.
La mère cerf protège son faon des prédateurs.
C1 noun /ˈfɒdər/

fodder

fourrage
Meaning
food for livestock such as cattle, horses, or sheep; also something considered of little value but used to supply a demand
Example
The farmer stored enough fodder for the cattle to last through winter.
Le fermier a stocké suffisamment de fourrage pour que le bétail ait de quoi se nourrir pendant l'hiver.
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 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 adjective /ˈfeɪt.fəl/

fateful

décisif ou fatal
Meaning
having significant or disastrous consequences
Example
Their fateful decision changed the course of history.
Leur décision décisive a changé le cours de l'histoire.
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 /ˌfʊl ˈbɒd.id/

full-bodied

à saveur intense
Meaning
Having a strong, rich, and robust quality, especially of wine, coffee, or voice.
Example
He prefers a full-bodied red wine with his dinner.
Il préfère un vin rouge à saveur intense avec son dîner.
C1 adjective /ˈfeɪl.seɪf/

fail-safe

antifaille
Meaning
designed to prevent failure or accidents; guaranteed to work correctly
Example
The engineers installed a fail-safe mechanism in the nuclear plant.
Les ingénieurs ont installé un mécanisme antifaille dans la centrale nucléaire.
C1 noun/verb /freɪ/

fray

dispute, s'effilocher
Meaning
As a noun, a fight or heated dispute; as a verb, to unravel or wear out through friction.
Example
He tried to stay calm, but his nerves began to fray during the argument.
Il a essayé de rester calme, mais ses nerfs ont commencé à s'effilocher pendant la dispute.
C1 noun /fiˈæs.koʊ/

fiasco

échec total
Meaning
a complete failure, especially a ludicrous or humiliating one
Example
The event turned into a complete fiasco due to poor planning.
L'événement est devenu un échec total à cause d'une mauvaise planification.
C1 adjective /ˈfiːlaɪn/

feline

lié aux chats
Meaning
relating to or characteristic of cats
Example
Her movements were graceful and almost feline in their elegance.
Ses mouvements étaient gracieux et presque félins dans leur élégance.
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 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 /ˈfɛtɪʃ/

fetish

dévotion excessive ou irrationnelle
Meaning
an excessive or irrational devotion to something
Example
He has a fetish for collecting rare stamps.
Il a un fétiche pour collectionner des timbres rares.
C1 adverb /ˈfɜː.vənt.li/

Fervently

avec ferveur; ardemment;
Meaning
with passionate intensity; ardently; with great emotion or enthusiasm
Example
She fervently hoped that her dreams would come true.
Elle espérait ardemment que ses rêves se réaliseraient.
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 /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 verb /ˈfɪdʒɪt/

fidget

se tortiller, être agité
Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
L'enfant a commencé à bouger pendant la longue conférence.
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 adjective /ˈfaɪə.ri/

Fiery

enflammé; passionné; irritable
Meaning
burning; passionate; hot-tempered; showing strong emotion
Example
She has a fiery temper that flares up quickly.
Elle a un tempérament enflammé qui s'emporte rapidement.
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 /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 /fɔːrˈɡoʊ/

forgo

renoncer
Meaning
to decide not to do or have something
Example
She decided to forgo dessert to maintain her diet.
Elle a décidé de renoncer au dessert pour maintenir son régime.
C1 noun /ˈfiːtəs/

fetus

fœtus
Meaning
an unborn or unhatched offspring in the womb or egg
Example
The doctor explained the development of the fetus during pregnancy.
Le médecin a expliqué le développement du fœtus pendant la grossesse.
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/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 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 /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 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 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 adjective /freɪl/

frail

fragile
Meaning
Physically weak and delicate.
Example
The old man was too frail to walk without help.
L'homme âgé était trop fragile pour marcher sans aide.
C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

fugitif
Meaning
a person who has escaped from a place or is in hiding, especially to avoid arrest
Example
The police launched a manhunt to capture the fugitive who escaped from prison.
La police a lancé une chasse à l'homme pour capturer le fugitif qui s'était échappé de la prison.
C1 noun /ˌfɜːrmənˈteɪʃən/

fermentation

fermentation, changement chimique par levures ou bactéries
Meaning
a chemical process by which substances like sugar are converted into alcohol or acids using microorganisms
Example
The fermentation of grapes produces wine.
La fermentation des raisins produit du vin.
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 /fɪˈdɛl.ɪ.ti/

fidelity

fidélité
Meaning
Faithfulness to a person, cause, or belief, demonstrated by continuing loyalty and support.
Example
A dog's fidelity to its owner is unmatched.
La fidélité d'un chien envers son maître est incomparable.
C1 noun ˌflʌk.tʃuˈeɪ.ʃən

fluctuation

fluctuation
Meaning
An irregular rising and falling in number or amount; a variation.
Example
The stock market experiences frequent fluctuation.
Le marché boursier connaît des fluctuations fréquentes.
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 verb /ˈfɜːr.tɪ.laɪz/

fertilize

fertiliser
Meaning
to make soil or land more fertile by adding substances
Example
Farmers fertilize the fields to increase crop yield.
Les agriculteurs fertilisent les champs pour augmenter le rendement des récoltes.
C1 noun /ˈfreɪlti/

frailty

fragilité
Meaning
The condition of being weak, delicate, or easily broken.
Example
Old age often comes with physical frailty.
La vieillesse vient souvent avec une fragilité physique.
C1 adjective /ˈfɛrəl/

feral

sauvage
Meaning
existing in a wild or untamed state; not domesticated
Example
The feral cat roamed the streets at night.
Le chat sauvage errait dans les rues la nuit.
C1 noun /faɪˈnælɪti/

finality

finalité
Meaning
the quality of being final or irreversible; a sense of conclusiveness
Example
The judge's decision gave the case a sense of finality.
La décision du juge a donné au cas un sentiment de finalité.
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 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 /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 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 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 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 noun /fiːnd/

fiend

démon, personne malfaisante
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.
Il est un vrai démon lorsqu'il s'agit de résoudre des énigmes.
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 adjective /ˈfrɔːdjʊlənt/

fraudulent

frauduleux
Meaning
Involving or using deceit, especially criminal deception.
Example
He was arrested for making fraudulent insurance claims.
Il a été arrêté pour avoir fait des demandes frauduleuses d'assurance.
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 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 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 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 /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 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 adjective /ˈfɜːr.vənt/

fervent

fervent, passionné
Meaning
having or showing intense passion or enthusiasm
Example
She gave a fervent speech about climate change.
Elle a prononcé un discours passionné sur le changement climatique.
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 adjective /ˈfleɪɡrənt/

flagrant

flagrant et clairement erroné
Meaning
shockingly noticeable or evident; glaringly wrong
Example
It was a flagrant violation of the rules.
C'était une violation évidente des règles.
C1 noun /ˈflɔː.rə/

flora

la vie végétale trouvée dans une région ou un habitat particulier
Meaning
The plant life found in a particular region or habitat.
Example
The Amazon rainforest is home to a vast flora diversity.
La forêt amazonienne abrite une grande diversité de flore.
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 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 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 verb /fret/

fret

s'inquiéter
Meaning
to worry or be anxious; to be troubled
Example
Don't fret about the exam results.
Ne t'inquiète pas pour les résultats de l'examen.
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 /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 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 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 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 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 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 noun /ˈfɔːreɪ/

foray

incursion / première tentative
Meaning
A sudden short attack or attempt, especially into new activity or territory.
Example
The company made its first foray into the international market.
L'entreprise a fait sa première incursion sur le marché international.
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 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 /ˈfruː.ɡəl/

Frugal

économe; parcimonieux
Meaning
economical; thrifty;
Example
She is very frugal and saves money by buying only necessary items.
Elle est très économe et économise de l'argent en achetant uniquement les articles nécessaires.
C1 adjective, adverb (informal, vulgar) /ˈfʌkɪŋ/

fucking

putain (mot vulgaire pour l'emphase)
Meaning
used for emphasis, often expressing anger or frustration (vulgar slang)
Example
It was a fucking disaster!
C'était un putain de désastre!