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C1 noun /ˈfʌŋɡəs/

fungus

hongo
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 extraño hongo estaba creciendo en el viejo árbol.
C1 noun /ˈfɔːrdʒər/

forger

falsificador
Meaning
a person who makes fake documents, artworks, or signatures
Example
The police arrested a forger who had been selling counterfeit paintings.
La policía arrestó a un falsificador que había estado vendiendo pinturas falsas.
C1 adjective /ˈfiːbl/

feeble

débil, flojo
Meaning
lacking physical strength or vigor; weak
Example
After the illness, she felt too feeble to stand.
Después de la enfermedad, se sintió demasiado débil para levantarse.
C1 noun /ˈfɔːr.teɪ/ or /fɔːrt/

forte

fortaleza
Meaning
a strong ability or talent; something one does particularly well
Example
Cooking is definitely her forte.
Cocinar es definitivamente su fortaleza.
C1 noun /fəˈnætɪsɪzəm/

fanaticism

fanatismo
Meaning
the quality of being fanatical; extreme zeal or obsession
Example
Religious fanaticism can lead to intolerance and conflict.
El fanatismo religioso puede llevar a la intolerancia y al conflicto.
C1 noun /ˈfɔːr.tɪ.tjuːd/

fortitude

fortaleza
Meaning
Courage in pain or adversity; mental and emotional strength in facing difficulty.
Example
She faced adversity with great fortitude.
Ella enfrentó las adversidades con gran fortaleza.
C1 adjective /ˈfɜːr.vənt/

fervent

apasionado, entusiasta
Meaning
having or showing intense passion or enthusiasm
Example
She gave a fervent speech about climate change.
Ella dio un discurso apasionado sobre el cambio climático.
C1 noun /fiːnd/

fiend

demonio, persona malvada
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.
Él es un verdadero demonio cuando se trata de resolver rompecabezas.
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

futurista
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.
El futurista predijo grandes cambios en el transporte dentro de la próxima década.
C1 verb /ˈfɔːrfɪt/

forfeit

perder, renunciar como penalización
Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
Tuvo que perder el partido después de romper las reglas.
C1 noun /ˈfʊtˌnoʊt/

foot-note

nota al pie
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.
El autor incluyó una nota al pie para explicar el contexto histórico.
C1 adjective /freɪl/

frail

débil
Meaning
Physically weak and delicate.
Example
The old man was too frail to walk without help.
El anciano estaba demasiado débil para caminar sin ayuda.
C1 verb /feɪn/

feign

fingir, simular
Meaning
to pretend or fake; to give a false appearance of
Example
She feigned illness to avoid going to work.
Ella fingió estar enferma para evitar ir a trabajar.
C1 adjective + noun ˈfeɪvərəbəl klaɪˈmætɪk kənˈdɪʃənz

favorable climatic conditions

condiciones climáticas favorables
Meaning
Weather conditions that are suitable and beneficial for growth or development
Example
Winter offers favorable climatic conditions for farming.
El invierno ofrece condiciones climáticas favorables para la agricultura.
C1 noun /ˈfæs.ɪt/

facet

faceta, aspecto, parte
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.
Cada faceta del proyecto fue cuidadosamente analizada.
C1 adjective /ˈfɔːrsəbl/

forcible

forzoso
Meaning
Done by force; using physical strength or power.
Example
The police made a forcible entry into the house.
La policía hizo una entrada forzosa en la casa.
C1 adjective /ˈfeɪt.fəl/

fateful

decisivo o fatal
Meaning
having significant or disastrous consequences
Example
Their fateful decision changed the course of history.
Su decisión decisiva cambió el curso de la historia.
C1 noun/verb /ˈfʌrəʊ/

furrow

surco
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.
El agricultor hizo surcos en el campo.
C1 noun /fəˈrɒs.ə.ti/

ferocity

ferocidad, violencia, intensidad
Meaning
The state or quality of being ferocious; extreme fierceness or violence.
Example
The storm's ferocity was devastating.
La ferocidad de la tormenta fue devastadora.
C1 noun /fɪlθ/

filth

suciedad
Meaning
dirty or disgusting matter; moral corruption
Example
The streets were full of filth after the storm.
Las calles estaban llenas de suciedad después de la tormenta.
C1 noun/adjective /fɔːrˈboʊdɪŋ/

foreboding

presagio ominoso
Meaning
A feeling that something bad will happen; ominous.
Example
She felt a deep sense of foreboding as she entered the abandoned house.
Ella sintió una profunda sensación de presagio ominoso al entrar en la casa abandonada.
C1 adjective /ˈfrɛn.zid/

frenzied

frenético
Meaning
Wildly excited or uncontrolled
Example
The frenzied crowd cheered as the band took the stage.
La multitud frenética vitoreó cuando la banda subió al escenario.
C1 adjective/noun /fəˈrɛns.ɪk/

forensic

Análisis científico aplicado a asuntos criminales o legales
Meaning
Scientific analysis applied to criminal or legal matters
Example
Forensic experts analyze cybercrimes using advanced tools.
Los expertos forenses analizan los delitos cibernéticos utilizando herramientas avanzadas.
C1 adjective /fɪkˈtɪʃəs/

fictitious

ficticio, falso
Meaning
not real or true; imaginary or fabricated
Example
The story he told was entirely fictitious.
La historia que contó era completamente ficticia.
C1 noun /fjuːd/

feud

disputa, enemistad
Meaning
a prolonged and bitter quarrel or conflict, often between families or groups
Example
The two families have been in a feud for generations.
Las dos familias han estado en una disputa durante generaciones.
C1 verb /ˈfɪdʒɪt/

fidget

moverse inquieto, estar inquieto
Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
El niño empezó a moverse durante la larga conferencia.
C1 noun ˈfɜːr.vɚ

fervor

pasión o entusiasmo
Meaning
Strong passion or enthusiasm for something.
Example
He spoke with great fervor about his vision for the company.
Habló con gran fervor sobre su visión para la empresa.
C1 adjective ˈfæʃ.ɪst

fascist

fascista
Meaning
Relating to or characteristic of fascism; extremely authoritarian.
Example
Fascist governance undermines freedom.
El gobierno fascista socava la libertad.
C1 adjective /ˈfliː.tɪŋ/

fleeting

efímero
Meaning
Lasting for a very short time; passing quickly.
Example
Happiness can be fleeting, so cherish every moment.
La felicidad puede ser efímera, así que aprecia cada momento.
C1 noun /fruːˈɡæl.ə.ti/

frugality

frugalidad
Meaning
The quality of being economical in use or expenditure; not wasteful.
Example
Frugality is essential for saving money effectively.
La frugalidad es esencial para ahorrar dinero de manera efectiva.
C1 adjective /ˈfænsiːd/

fancied

imaginado, deseado
Meaning
imagined, desired, or believed without evidence
Example
He is a fancied suitor in the eyes of the young lady.
Él es un pretendiente imaginado a los ojos de la joven.
C1 adjective /ˈfiːlaɪn/

feline

relacionado con los gatos
Meaning
relating to or characteristic of cats
Example
Her movements were graceful and almost feline in their elegance.
Sus movimientos eran gráciles y casi felinos en su elegancia.
C1 noun /fəˈtæləti/

fatality

fatalidad
Meaning
An occurrence of death by accident, disaster, or violence.
Example
The accident resulted in one fatality.
El accidente resultó en una fatalidad.
C1 verb /fret/

fret

preocuparse
Meaning
to worry or be anxious; to be troubled
Example
Don't fret about the exam results.
No te preocupes por los resultados del examen.
C1 noun /fɔːrˈmæl.ə.ti/

Formality

formalidad
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 firma del contrato fue solo una formalidad; el acuerdo ya estaba acordado.
C1 adjective /ˈfuːlpruːf/

foolproof

a prueba de tontos
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.
El nuevo software tiene un proceso de instalación a prueba de tontos.
C1 adjective /ˌfɑːrˈfɛtʃt/

far-fetched

increíble
Meaning
unlikely to happen or be true; improbable
Example
His explanation for being late was a bit far-fetched.
Su explicación por llegar tarde era un poco increíble.
C1 noun /ˈfɔːrˌfɑːðər/

forefather

antepasado
Meaning
an ancestor, especially one who was part of an earlier generation of a family or nation
Example
Our forefathers fought for independence.
Nuestros antepasados lucharon por la independencia.
C1 verb /flɪntʃ/

flinch

retroceder
Meaning
to suddenly move back or away due to fear or pain
Example
He didn’t flinch when the doctor gave him the injection.
Él no se echó atrás cuando el doctor le dio la inyección.
C1 verb /fɔːrˈtɛl/

foretell

predecir
Meaning
to predict or announce something before it happens
Example
The old man claimed he could foretell the future.
El anciano afirmó que podía predecir el futuro.
C1 noun /ˈfɛləni/

felony

delito grave
Meaning
a serious crime, usually punishable by imprisonment for more than one year
Example
He was convicted of a felony and sentenced to ten years in prison.
Fue condenado por un delito grave y sentenciado a diez años de prisión.
C1 adjective /ˈfɪk.əl/

Fickle

inconstante; volátil; cambiante;
Meaning
changeable; inconstant; liable to sudden unpredictable change
Example
His fickle nature made it hard to trust his promises.
Su naturaleza inconstante hizo que fuera difícil confiar en sus promesas.
C1 adjective /frəˈtɜːrnəl/

fraternal

fraternal
Meaning
Relating to brothers or brotherhood; friendly and supportive.
Example
The two nations maintain a fraternal relationship.
Las dos naciones mantienen una relación fraternal.
C1 noun ˌfɜːr.tɪ.laɪˈzeɪ.ʃən

fertilization

fertilización
Meaning
The process of adding nutrients to soil to increase crop productivity.
Example
Organic fertilization enhances soil health.
La fertilización orgánica mejora la salud del suelo.
C1 noun /ˈfɔːrɡraʊnd/

foreground

primer plano
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.
Las flores en el primer plano iluminaron la imagen.
C1 verb /ˈfɔːrtɪˌfaɪ/

fortify

fortificar
Meaning
To strengthen a place, person, or thing physically or mentally.
Example
They fortified the city walls to protect against invasion.
Fortificaron las murallas de la ciudad para protegerse contra la invasión.
C1 verb /ˈfʌmbəl/

fumble

torpeza
Meaning
to handle something clumsily or to make mistakes while doing something
Example
He fumbled with the keys and dropped them on the floor.
Él torpedeó con las llaves y las dejó caer al suelo.
C1 verb /fɔːrˈseɪk/

forsake

abandonar
Meaning
to abandon or give up something or someone
Example
He decided not to forsake his old friends despite his success.
Él decidió no abandonar a sus viejos amigos a pesar de su éxito.
C1 noun /ˌfɪɡjʊˈriːn/

figurine

pequeña figura decorativa
Meaning
a small ornamental statue or model of a human or animal
Example
She bought a porcelain figurine of a dancing ballerina.
Ella compró una figura de porcelana de una bailarina de ballet.
C1 noun fluˈɪd.ɪ.ti

fluidity

fluididez
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 fluididez de los movimientos de la bailarina era hipnotizante.
C1 adjective /ˈfɪɡərətɪv/

figurative

figurado
Meaning
not literal; using figures of speech or symbolic representation
Example
She used figurative language to describe her feelings.
Ella usó lenguaje figurado para describir sus sentimientos.
C1 verb /fɔːˈbɛər/

forbear

abstenerse
Meaning
To refrain from doing something; to show patience or self-control.
Example
She forbore from commenting on his mistake.
Ella se abstuvo de comentar sobre su error.
C1 adjective /ˈfɔːrθˌraɪt/

forthright

directo
Meaning
Direct and honest in speech or behavior; straightforward.
Example
She was forthright in her criticism of the policy.
Ella fue directa en su crítica a la política.
C1 noun /ˈfaɪər.wɔːl/

firewall

cortafuegos
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 cortafuegos protege las redes de ciberataques.
C1 noun /ˈfoʊk.lɔːr/

folk-lore

folklore
Meaning
The traditional beliefs, customs, stories, songs, and practices of a community, passed down through generations.
Example
Bangladeshi folk-lore is rich with myths and legends.
El folklore mexicano está lleno de mitos y leyendas.
C1 verb /ˈfɔːltər/

falter

vacilar o perder fuerza o impulso
Meaning
to hesitate or lose strength or momentum
Example
Her voice faltered as she delivered the speech.
Su voz vaciló mientras pronunciaba el discurso.
C1 adjective, adverb (informal, vulgar) /ˈfʌkɪŋ/

fucking

maldito (palabra vulgar para énfasis)
Meaning
used for emphasis, often expressing anger or frustration (vulgar slang)
Example
It was a fucking disaster!
¡Fue un maldito desastre!
C1 noun /ˈfɔːrsəm/

foursome

cuatro personas o cosas
Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
El cuarteto disfrutó de un juego de golf juntos.
C1 adjective fæsˈtɪd.i.əs

fastidious

meticuloso
Meaning
Very attentive to and concerned about accuracy and detail.
Example
She is fastidious about maintaining cleanliness.
Ella es meticulosa al mantener la limpieza.
C1 noun ˈfɔː.saɪt

foresight

previsión
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.
Su previsión ayudó a la empresa a evitar pérdidas financieras.
C1 noun /ˈfæm.ɪn/

Famine

hambruna
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 sequía provocó una hambruna generalizada en la región.
C1 verb /ˈfɛdərət/

federate

federar
Meaning
to unite in a league or federation; to form an alliance
Example
Several states federated to create a stronger union.
Varios estados se federaron para crear una unión más fuerte.
C1 adjective /fərˈlɔːrn/

forlorn

desamparado, triste
Meaning
extremely sad, lonely, or abandoned
Example
The abandoned puppy looked so forlorn in the rain.
El cachorro abandonado se veía tan triste bajo la lluvia.
C1 adjective /frəˈnɛtɪk/

frenetic

frenético
Meaning
Fast and energetic in a wild or uncontrolled way.
Example
The stock market experienced frenetic trading after the announcement.
El mercado de valores experimentó un comercio frenético después del anuncio.
C1 verb /ˈfɜːrmɛnt/

ferment

someterse a un proceso químico donde los azúcares se convierten en alcohol o ácido; incitar o agitar el cambio
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.
Las uvas se dejan fermentar durante varias semanas.
C1 adjective /ˈflʌstərd/

flustered

desconcertado
Meaning
in a state of confusion or agitation
Example
She appeared flustered after being asked so many questions.
Ella parecía desconcertada después de tantas preguntas.
C1 noun /fiˈæs.koʊ/

fiasco

fracaso total
Meaning
a complete failure, especially a ludicrous or humiliating one
Example
The event turned into a complete fiasco due to poor planning.
El evento se convirtió en un fracaso total debido a una mala planificación.
C1 noun /ˈfɔːrwɜːrd/

foreword

prólogo
Meaning
a short introduction at the beginning of a book, typically written by someone other than the author
Example
The foreword of the book was written by a famous historian.
El prólogo del libro fue escrito por un historiador famoso.
C1 noun /ˈflæt.ər.i/

Flattery

adulación
Meaning
excessive and insincere praise, given especially to further one's own interests
Example
His constant flattery made everyone suspicious of his true motives.
Su constante adulación hizo que todos sospecharan de sus verdaderas intenciones.
C1 adjective /ˈfɜːrtɪv/

furtive

furtivo
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.
Él echó una mirada furtiva a la puerta antes de salir.
C1 noun /ˈfɔːrˌbɛərz/

forebears

antepasados
Meaning
Ancestors or people in previous generations from whom one is descended.
Example
We must honor the traditions of our forebears.
Debemos honrar las tradiciones de nuestros antepasados.
C1 noun /ˈfɔːrmən/

foreman

persona encargada de un grupo de trabajadores, especialmente en una fábrica o en una obra de construcción
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.
El capataz supervisó a los trabajadores en el sitio de construcción.
C1 noun /ˌfɜːrmənˈteɪʃən/

fermentation

fermentación, cambio químico por levaduras o bacterias
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 fermentación de uvas produce vino.
C1 adjective /ˈfræɡməntɪd/

fragmented

fragmentado, dividido, incompleto
Meaning
Having been broken into fragments; disjointed or incomplete.
Example
The information was fragmented and difficult to understand.
La información estaba fragmentada y era difícil de entender.
C1 adjective /ˈfrɪdʒɪd/

Frigid

frío; helado
Meaning
extremely cold; freezing; icy
Example
The frigid weather made it difficult to go outside.
El clima frío dificultó salir afuera.
C1 verb /flaʊt/

flout

despreciar
Meaning
To openly disregard or show contempt for a rule or law.
Example
The company was fined for flouting environmental regulations.
La empresa fue multada por ignorar las regulaciones ambientales.
C1 verb /fɔːrˈkloʊz/

foreclose

embargar
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.
El banco decidió embargar la propiedad después de meses de pagos perdidos.
C1 verb /flɑp/

flop

fracaso
Meaning
to fall or move heavily and clumsily; to fail completely
Example
The new movie flopped at the box office.
La nueva película fracasó en la taquilla.
C1 noun /fɑːrs/

farce

farsa
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 reunión se convirtió en una farsa completa con todos discutiendo.
C1 verb /ˈfɔːlsɪfaɪ/

falsify

falsificar
Meaning
to make something false or to misrepresent
Example
He tried to falsify the documents to avoid taxes.
Él trató de falsificar los documentos para evitar impuestos.
C1 noun, verb /fɔːrd/

ford

vado
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.
Los viajeros decidieron cruzar el río por un vado al amanecer.
C1 noun /fæd/

fad

moda pasajera, tendencia
Meaning
a temporary fashion or trend; a short-lived craze
Example
The new diet became a popular fad among teenagers.
La nueva dieta se convirtió en una moda pasajera entre los adolescentes.
C1 noun /ˈfɪɡjərˌhɛd/

figurehead

cabeza simbólica
Meaning
a nominal leader with no real power; a symbolic head
Example
The king was merely a figurehead with no real authority.
El rey era simplemente un líder simbólico sin poder real.
C1 noun /ˈfɛtɪʃ/

fetish

devoción excesiva o irracional
Meaning
an excessive or irrational devotion to something
Example
He has a fetish for collecting rare stamps.
Él tiene una fijación por coleccionar sellos raros.
C1 noun ˌfɔːtɪfɪˈkeɪʃn

fortification

fortificación
Meaning
A defensive wall or other reinforcement built to strengthen a place against attack.
Example
The fortifications protected the city.
Las fortificaciones protegieron la ciudad.
C1 adjective /ˈflɪmzi/

flimsy

débil
Meaning
weak, fragile, or lacking in strength; not convincing
Example
The chair was too flimsy to support his weight.
La silla era demasiado débil para soportar su peso.
C1 noun /frɪndʒ/

fringe

borde decorativo / orilla
Meaning
A decorative border of threads; the outer edge or margin of something.
Example
The festival had a fringe of small independent performances.
El festival tenía un borde de pequeñas actuaciones independientes.
C1 adverb /ˈfɜː.vənt.li/

Fervently

con fervor; ardientemente;
Meaning
with passionate intensity; ardently; with great emotion or enthusiasm
Example
She fervently hoped that her dreams would come true.
Ella esperaba fervientemente que sus sueños se hicieran realidad.
C1 noun, verb /ˈfɜːrloʊ/

furlough

licencia temporal
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.
Muchos trabajadores fueron puestos en furlough durante la crisis.
C1 noun /ˈfoʊliɪdʒ/

foliage

follaje
Meaning
The leaves of a plant, collectively.
Example
The autumn foliage looked stunning in the park.
El follaje de otoño se veía impresionante en el parque.
C1 verb /ˈflaʊndər/

flounder

tambalear
Meaning
To struggle or stagger clumsily; to experience difficulty or confusion.
Example
He floundered in the interview when asked difficult questions.
Él se tambaleó en la entrevista cuando le hicieron preguntas difíciles.
C1 noun /ˈfɔːrˌrʌnər/

forerunner

precursor
Meaning
A person or thing that comes before another; a predecessor or harbinger.
Example
The Wright brothers were the forerunners of modern aviation.
Los hermanos Wright fueron los precursores de la aviación moderna.
C1 noun/verb /freɪ/

fray

pelea, desgastarse
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.
Trató de mantenerse calmado, pero sus nervios empezaron a desgastarse durante la discusión.
C1 noun /ˈfɒdər/

fodder

forraje
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.
El granjero almacenó suficiente forraje para que el ganado tuviera suficiente durante el invierno.
C1 adjective /ˌfɑːrˈfetʃt/

farfetched

improbable o poco probable
Meaning
unlikely to happen or be true; improbable
Example
His explanation for being late sounded farfetched.
Su explicación para llegar tarde sonaba inverosímil.
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

fragilidad
Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
La fragilidad de la córnea aumenta con el frotamiento.
C1 noun/adjective ˈflɛdʒ.lɪŋ

fledgling

principiante, inexperto, recién establecido
Meaning
New, inexperienced, newly established.
Example
The fledgling startup needs investment.
La empresa principiante necesita inversión.
C1 noun /ˈfren.zi/

Frenzy

frenesí
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.
El anuncio de la venta creó una locura de compras en el centro comercial.
C1 noun ˈfæl.ə.si

fallacy

falacia, error, razonamiento falso
Meaning
False belief, misconception, false reasoning.
Example
The idea that success comes easy is a fallacy.
La idea de que el éxito viene fácil es una falacia.
C1 adjective /ˈflæʃi/

flashy

llamativo, ostentoso
Meaning
ostentatious or showy in a way that attracts attention
Example
He drove a flashy sports car through the city streets.
Él condujo un coche deportivo llamativo por las calles de la ciudad.
C1 noun /flʌks/

flux

flujo
Meaning
continuous change or movement; the rate of flow of something
Example
The company was in a state of constant flux during the reorganization.
La empresa estaba en un estado de flujo constante durante la reorganización.
C1 adjective /ˈfæn.sɪ.fəl/

fanciful

fantasioso, irreal
Meaning
overimaginative, unrealistic, or whimsical
Example
The story was too fanciful to be true.
La historia era demasiado fantasiosa para ser cierta.
C1 verb /flɔːnt/

flaunt

presumir
Meaning
to show off something proudly, often to attract attention
Example
She likes to flaunt her new jewelry at parties.
A ella le gusta presumir sus nuevas joyas en las fiestas.
C1 noun /ˈfɔː.nə/

fauna

la vida animal de una región específica
Meaning
The animal life of a particular region, habitat, or geological period.
Example
The fauna of the African savannah includes lions and elephants.
La fauna de la sabana africana incluye leones y elefantes.
C1 adjective /ˈfruːt.ləs/

Fruitless

infructuoso; inútil; fútil;
Meaning
unsuccessful; futile; pointless;
Example
After hours of searching, their efforts proved fruitless.
Después de horas de búsqueda, sus esfuerzos resultaron infructuosos.
C1 noun /ˈfrek.əl/

Freckle

peca
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.
Su rostro estaba cubierto de lindas pecas que aparecían cada verano.
C1 verb /ˈfɜːr.tɪ.laɪz/

fertilize

fertilizar
Meaning
to make soil or land more fertile by adding substances
Example
Farmers fertilize the fields to increase crop yield.
Los agricultores fertilizan los campos para aumentar la cosecha.
C1 adjective /ˈfleɪɡrənt/

flagrant

escandaloso y claramente erróneo
Meaning
shockingly noticeable or evident; glaringly wrong
Example
It was a flagrant violation of the rules.
Fue una clara violación de las reglas.
C1 noun /fəˈsɑːd/

facade

fachada
Meaning
The front of a building; a false or superficial appearance
Example
The building's glass facade reflected the sunset.
La fachada de vidrio del edificio reflejaba el atardecer.
C1 noun /ˈfɔɪeɪr/

foyer

vestíbulo
Meaning
An entrance hall or lobby in a building.
Example
The guests waited in the hotel foyer before checking in.
Los huéspedes esperaron en el vestíbulo del hotel antes de registrarse.
C1 noun /ˈflɔː.rə/

flora

la vida vegetal encontrada en una región o hábitat particular
Meaning
The plant life found in a particular region or habitat.
Example
The Amazon rainforest is home to a vast flora diversity.
La selva amazónica es hogar de una gran diversidad de flora.
C1 noun /fɪˈnɛs/

finesse

sutilidad, destreza, refinamiento
Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
El artista pintó con gran destreza.
C1 noun /ˈfɪʃ.ər/

fissure

fisura
Meaning
a long, narrow opening or crack in a surface or object
Example
The earthquake caused a deep fissure in the road.
El terremoto causó una fisura profunda en la carretera.
C1 adjective /ˈfrɪvələs/

frivolous

frívolo
Meaning
Not having any serious purpose or value; silly or unimportant.
Example
She dismissed the frivolous complaint quickly.
Ella desestimó la queja frívola rápidamente.
C1 noun /ˈfaɪərɑːm/

firearm

arma de fuego
Meaning
a weapon capable of firing a projectile using gunpowder or other propellant
Example
The police found a hidden firearm during the investigation.
La policía encontró un arma de fuego oculta durante la investigación.
C1 noun/verb ˈfɒr.ɪdʒ

forage

forraje, buscar comida
Meaning
Food for horses and cattle, especially dried hay or feed; to search for food.
Example
Animals forage for food during the winter months.
Los animales forrajean para buscar comida durante los meses de invierno.
C1 noun /ˌfæb.rɪˈkeɪ.ʃən/

fabrication

invención falsa
Meaning
The invention of false or misleading information; a lie or falsehood.
Example
The article was full of fabrication and misleading claims.
El artículo estaba lleno de invenciones falsas y reclamos engañosos.
C1 adjective /ˈfeɪl.seɪf/

fail-safe

antifallo
Meaning
designed to prevent failure or accidents; guaranteed to work correctly
Example
The engineers installed a fail-safe mechanism in the nuclear plant.
Los ingenieros instalaron un mecanismo antifallo en la planta nuclear.
C1 noun ˌflʌk.tʃuˈeɪ.ʃən

fluctuation

fluctuación
Meaning
An irregular rising and falling in number or amount; a variation.
Example
The stock market experiences frequent fluctuation.
El mercado de valores experimenta frecuentes fluctuaciones.
C1 noun /ˈfɔːls.hʊd/

Falsehood

falsedad; mentira
Meaning
the state of being untrue; a lie
Example
The politician was caught spreading falsehoods about his opponent.
El político fue atrapado difundiendo falsedades sobre su oponente.
C1 noun /fəˌsɪlɪˈteɪʃən/

facilitation

facilitación
Meaning
The action of facilitating or making an action or process easier or helping bring about an outcome.
Example
Her facilitation made the meeting run smoothly.
Su facilitación hizo que la reunión fuera fluida.