flagrant
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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 verb /fɔːrˈɡoʊ/

forego

renunciar
Meaning
to decide not to do or have something pleasant or valuable
Example
She decided to forego dessert to maintain her diet.
Ella decidió renunciar al postre para mantener su dieta.
C1 noun /ˈfɛlən/

felon

delincuente
Meaning
a person who has committed a serious crime
Example
The felon was sentenced to ten years in prison.
El delincuente fue sentenciado a diez años de prisión.
C2 verb /frɪz/

frizz

encrespar el cabello o hacerlo desordenado
Meaning
to form into small, tight curls or cause hair to become fuzzy and tangled
Example
The humid weather caused her hair to frizz.
El clima húmedo hizo que su cabello se encrespara.
C2 adjective /fəˈloʊniəs/

felonious

relacionado con un delito grave
Meaning
relating to or involved in serious criminal activity
Example
He was charged with felonious assault after the incident.
Fue acusado de asalto grave después del incidente.
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.
A2 adjective, adverb /ˈfʊl taɪm/

full-time

a tiempo completo
Meaning
working or studying for the whole standard period of time
Example
She works full-time as a teacher.
Ella trabaja a tiempo completo como profesora.
B2 adjective /ˌfʌndəˈmɛntl/

fundamental

fundamental
Meaning
forming a necessary base or core; of central importance
Example
Honesty is a fundamental principle of good leadership.
La honestidad es un principio fundamental de buen liderazgo.
B2 adjective /ˈfɜːr.taɪl/

Fertile

fértil
Meaning
capable of producing abundant vegetation or crops; able to conceive children
Example
The fertile soil in this region makes it perfect for growing vegetables.
El suelo fértil de esta región lo hace perfecto para cultivar verduras.
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.
B2 adverb /ˌfɜːrðərˈmɔːr/

furthermore

además
Meaning
Used to introduce an additional point or idea; in addition.
Example
The plan is simple and, furthermore, it is affordable.
El plan es sencillo y, además, es asequible.
B2 noun fɪkst ˈɪnkʌm

fixed income

ingresos fijos
Meaning
Investment that provides a return in the form of fixed periodic payments.
Example
Fixed income investments provide reliable returns.
Las inversiones de ingreso fijo proporcionan rendimientos confiables.
C1 adjective ˈflʌd proʊn

flood-prone

propenso a inundaciones
Meaning
Susceptible to flooding; likely to experience floods frequently.
Example
Bangladesh is a flood-prone deltaic nation.
Bangladesh es una nación deltaica propensa a inundaciones.
C2 noun /flæks/

flax

lino
Meaning
a plant whose fibers are used to make linen and whose seeds are edible
Example
Flax is often used in making linen fabrics.
El lino se usa a menudo para hacer telas de lino.
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.
B2 adjective /fəˈɡɪv.ɪŋ/

Forgiving

perdonador
Meaning
ready and willing to forgive; merciful; lenient
Example
She has a forgiving nature and rarely holds grudges.
Ella tiene una naturaleza perdonadora y rara vez guarda rencor.
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 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.
El boxeador era un oponente formidable en el ring.
C2 adjective /ˈfʊtˌluːs/

footloose

libre
Meaning
Free to go anywhere or do anything; not tied down by responsibilities.
Example
After graduating, he felt footloose and ready to explore the world.
Después de graduarse, se sintió libre y listo para explorar el mundo.
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 /ˈfaɪə.ri/

Fiery

ardiente; apasionado; temperamental
Meaning
burning; passionate; hot-tempered; showing strong emotion
Example
She has a fiery temper that flares up quickly.
Ella tiene un temperamento ardiente que se enciende rápidamente.
B2 adjective /ˈfeɪvərəbəl/

favorable

favorable
Meaning
expressing approval or support; advantageous
Example
The weather conditions were favorable for the outdoor event.
Las condiciones climáticas fueron favorables para el evento al aire libre.
B2 noun /fliːt/

fleet

flota
Meaning
a group of ships, vehicles, or aircraft operating together under one command
Example
The navy deployed its entire fleet for the exercise.
La armada desplegó toda su flota para el ejercicio.
C1 adjective ˈfjuː.taɪl

futile

fútil
Meaning
Incapable of producing any useful result; pointless.
Example
His attempts to change the situation were futile.
Sus intentos de cambiar la situación fueron inútiles.
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.
C2 noun /ˌfjuːzɪˈleɪd/

fusillade

fuselaje
Meaning
A series of shots fired or missiles thrown all at the same time or in quick succession.
Example
The soldiers advanced under a fusillade of bullets.
Los soldados avanzaron bajo una fusilada de balas.
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.
B2 noun /ˈfɪlmˌmeɪkər/

film-maker

cineasta
Meaning
A person who directs or produces films
Example
The film-maker received an award for his latest documentary.
El cineasta recibió un premio por su último documental.
B1 noun fəˈsɪl.ɪ.tiz

facilities

instalaciones
Meaning
A place, amenity, or piece of equipment provided for a particular purpose.
Example
Facilities improve industrial productivity.
Las instalaciones mejoran la productividad industrial.
A2 noun /ˈfaɪəˌwɜːk/

firework

fuegos artificiales
Meaning
a device that explodes or creates a display of lights and sounds, often used in celebrations
Example
The fireworks lit up the sky during the New Year's Eve celebration.
Los fuegos artificiales iluminaron el cielo durante la celebración de la víspera de Año Nuevo.
C2 adjective /ˈfʌndʒəbl/

fungible

fungible
Meaning
interchangeable; able to replace or be replaced by another identical item
Example
In finance, money is considered a fungible asset.
En finanzas, el dinero se considera un activo fungible.
C2 adjective fəˈleɪ.ʃəs

fallacious

falso
Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
Su argumento estaba basado en razonamientos falsos.
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 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.
C2 noun /fez/

Fez

fez
Meaning
a cone-shaped red hat with a tassel, traditionally worn by men in some Middle Eastern countries
Example
The traditional costume included a red fez with a black tassel.
El traje tradicional incluía un fez rojo con un borlón negro.
C2 verb /ˈfʌdəl/

fuddle

confundir
Meaning
To confuse or stupefy, especially with alcohol or overwhelming information.
Example
The complicated instructions fuddled the new employees.
Las instrucciones complicadas confundieron a los nuevos empleados.
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.
C2 noun /ˈfrɔːdjʊləns/

fraudulence

fraude
Meaning
The quality or state of being fraudulent; deceitfulness.
Example
The audit revealed fraudulence in the financial statements.
La auditoría reveló fraude en los estados financieros.
B2 verb /ˈfɜːrnɪʃ/

furnish

amueblar, proporcionar
Meaning
to provide or supply with furniture or equipment
Example
They furnished the new house with modern furniture.
Ellos amueblaron la nueva casa con muebles modernos.
C1 verb /ˈfæbrɪkeɪt/

fabricate

fabricar
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.
El testigo fabricó su testimonio para protegerse.
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.
C2 noun /feɪt/

fete

fiesta, celebración
Meaning
a celebration or festival, often in honor of someone
Example
The village held a grand fete to celebrate the harvest.
El pueblo celebró una gran fiesta para celebrar la cosecha.
A2 noun /fiːld/

field

campo
Meaning
an area of open land, often used for farming, sports, or scientific study
Example
The children played football in the field.
Los niños jugaron al fútbol en el campo.
B1 noun /fəˈsɪl.ɪ.ti/

facility

instalación
Meaning
A place, amenity, or piece of equipment provided for a particular purpose.
Example
The facility was well-maintained.
La instalación estaba bien mantenida.
A1 adjective /ˈfʌn.i/

Funny

divertido; extraño; gracioso;
Meaning
humorous; strange; amusing;
Example
He told a funny joke that made everyone laugh.
Él contó una broma divertida que hizo reír a todos.
A2 noun /fæn/

Fan

fan; admirador; ventilador
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.
Ella es una gran fan de la música clásica y asiste a todos los conciertos de la ciudad.
C1 noun (plural of fungus) /ˈfʌndʒaɪ/

fungi

hongo
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.
Los hongos desempeñan un papel importante en la descomposición de materia orgánica en la naturaleza.
B2 verb /fɔːrdʒ/

forge

forjar, falsificar
Meaning
to create or shape something, often with effort or skill; also to counterfeit or fake something
Example
The blacksmith forged a strong sword from the iron.
El herrero forjó una espada fuerte con el hierro.
C2 verb /ˈfɛstər/

fester

empeorar, intensificarse
Meaning
to become worse or more intense, often through neglect or infection
Example
If grievances are ignored, they may fester into resentment.
Si se ignoran las quejas, pueden convertirse en resentimiento.
C2 verb /fleɪ/

flay

despojar/criticar severamente
Meaning
to strip off the skin of something or criticize severely
Example
The chef flayed the fish before cooking it.
El chef despojó el pescado antes de cocinarlo.
C2 noun /ˈfʌŋkʃəˌnɛri/

functionary

funcionario
Meaning
a person who has official duties in an organization, especially one with little authority
Example
The minor functionary was responsible for filing reports.
El funcionario menor era responsable de presentar los informes.
A2 noun, verb /fɔːrm/

form

forma / formulario
Meaning
the shape or structure of something; to bring something into existence
Example
Students filled out the registration form.
Los estudiantes completaron el formulario de registro.
C2 verb /ˌfɔːrɔːrˈdeɪn/

foreordain

predestinar
Meaning
to determine or decree something in advance; to predestine
Example
Some believe that our lives are foreordained by fate.
Algunos creen que nuestras vidas están predestinadas por el destino.
B2 verb /ˈflʌrɪʃ/

flourish

florecer
Meaning
To grow or develop in a healthy or successful way.
Example
Her business began to flourish after she introduced online sales.
Su negocio comenzó a florecer después de que introdujo las ventas en línea.
C2 noun /flɔːˈrɛsəns/

florescence

florecimiento
Meaning
The process, state, or period of flowering.
Example
The garden reached its peak florescence in spring.
El jardín alcanzó su punto máximo de florecimiento en primavera.
B2 adjective, verb (present participle) /ˈfloʊtɪŋ/

floating

flotante
Meaning
remaining on the surface of a liquid without sinking; moving lightly or freely
Example
The boat was floating gently on the calm lake.
El barco estaba flotante suavemente en el lago tranquilo.
A1 verb /feɪs/

face

enfrentar
Meaning
to confront or deal with; to turn toward; to have the front in a particular direction
Example
She had to face many challenges in her new job.
Ella tuvo que enfrentar muchos desafíos en su nuevo trabajo.
C2 noun /ˈflɒtsəm/

flotsam

escombros flotantes
Meaning
Floating debris from a shipwreck or things discarded and left floating.
Example
The beach was littered with flotsam after the storm.
La playa estaba llena de escombros flotantes después de la tormenta.
C2 adverb /ˌfɔːrθˈwɪθ/

Forthwith

inmediatamente; sin demora; al instante
Meaning
immediately; without delay; at once
Example
The manager ordered the employee to stop the unsafe practice forthwith.
El gerente ordenó al empleado detener la práctica peligrosa de inmediato.
A1 adjective /fɑːst/

Fast

rápido; veloz
Meaning
moving or happening quickly; rapid; swift
Example
She runs very fast in the morning.
Ella corre muy rápido por la mañana.
A1 numeral /fɔːr/

four

cuatro
Meaning
The number equivalent to the sum of two and two; one more than three.
Example
She has four books on her desk.
Ella tiene cuatro libros en su escritorio.
B2 noun /ˈfɔːrəm/

forum

foro
Meaning
A place, meeting, or medium where ideas and views can be exchanged.
Example
The online forum allows people to discuss a wide range of topics.
El foro en línea permite a las personas discutir una amplia gama de temas.
C1 noun, verb /ˈfrænʧaɪz/

franchise

franquicia
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.
Él abrió una nueva franquicia de comida rápida en la ciudad.
B1 adjective /ˈfɔːrmər/

former

anterior
Meaning
Having been previously in a particular role or position.
Example
He is a former president of the association.
Él es un presidente anterior de la asociación.
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.
C2 adjective /ˈfraɪəbl/

friable

frágil
Meaning
Easily crumbled or reduced to powder.
Example
The old brick wall was friable and broke apart at a touch.
La pared vieja de ladrillos era frágil y se rompió con solo tocarla.
C2 adjective /ˈfɒp.ɪʃ/

Foppish

excesivamente preocupado por la apariencia y la ropa; vanidoso con la vestimenta
Meaning
excessively concerned with one's appearance and clothes; vain about dress
Example
His foppish behavior and expensive clothes made him stand out.
Su comportamiento foppish y su ropa cara lo hacían destacar.
C2 adjective /ˈfʌsti/

fusty

húmedo y rancio
Meaning
smelling stale, damp, or stuffy; old-fashioned
Example
The room smelled fusty after being closed for months.
La habitación olía a rancio después de estar cerrada durante meses.
B1 noun /ˈfæn.si/

Fancy

gusto; imaginación o fantasía
Meaning
a feeling of liking or wanting something; imagination or fantasy
Example
The child had a fancy for becoming a famous astronaut when he grew up.
El niño tenía una inclinación por convertirse en un astronauta famoso cuando creciera.
A1 adjective /fɜːrst/

first

primero
Meaning
coming before all others in time, order, or importance
Example
She was the first to arrive at the meeting.
Ella fue la primera en llegar a la reunión.
A2 noun /fluː/

flu

gripe
Meaning
a contagious viral illness causing fever, aches, and respiratory symptoms; influenza
Example
She stayed home because she had the flu.
Se quedó en casa porque tenía gripe.
C2 verb /fɔːrˈdʒʌdʒ/

forejudge

juzgar por adelantado
Meaning
To judge beforehand without adequate information.
Example
It is unfair to forejudge someone without knowing the facts.
Es injusto juzgar a alguien sin conocer los hechos.
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.
A2 adjective /ˈfɔːrməl/

formal

formal
Meaning
done in accordance with rules of convention or etiquette; official or serious in nature
Example
He wore a formal suit to the wedding.
Él usó un traje formal para la boda.
B2 noun /fɪɡ/

Fig

higo
Meaning
a soft sweet fruit that is purple or green on the outside and has many small seeds
Example
The fig tree in our backyard produces delicious fruits every summer.
El árbol de higo en nuestro jardín produce frutas deliciosas cada verano.
C1 noun, verb /ˈfɛrɪt/

ferret

hurón, buscar persistentemente o descubrir algo
Meaning
a small domesticated animal used for hunting; to search or uncover something persistently
Example
He ferreted out the hidden documents.
Él sacó los documentos ocultos.
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.
A2 noun /frɒɡ/

Frog

rana
Meaning
a small amphibian animal that lives both in water and on land
Example
The frog jumped from the lily pad into the pond.
La rana saltó desde la almohadilla de lirio al estanque.
A2 noun/adjective /ˈfiːmeɪl/

female

hembra
Meaning
a person or animal of the sex that can bear offspring; relating to women or girls
Example
The female lion protects her cubs fiercely.
La leona hembra protege a sus cachorros ferozmente.
C2 noun /ˈflæt.ər.ər/

Flatterer

adulador
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.
El rey estaba rodeado de aduladores que solo le decían lo que quería oír.
C2 adjective /ˈfiːbraɪl/

febrile

febril, excitado
Meaning
having or showing the symptoms of a fever; or highly excitable or agitated
Example
The patient was in a febrile state with high temperature.
El paciente estaba en un estado febril con alta temperatura.
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.
A1 verb /ˈfɒloʊ/

follow

seguir
Meaning
to move behind someone or something; to go after or come after
Example
The children followed their teacher into the classroom.
Los niños siguieron a su maestro al aula.
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.
C2 adjective /ˈfɪnɪki/

finicky

difícil de complacer; muy particular en los detalles
Meaning
difficult to please; very particular about details
Example
He is so finicky about his food that he only eats organic vegetables.
Él es tan quisquilloso con su comida que solo come verduras orgánicas.
C2 adjective /fəˈlɪsɪtəs/

felicitous

apropiado, adecuado o placentero; marcado por buena suerte o felicidad
Meaning
well-chosen, appropriate, or pleasing; marked by good fortune or happiness
Example
She made a felicitous remark that lightened the mood.
Hizo un comentario apropiado que aligeró el ambiente.
B1 noun /fɒɡ/

Fog

niebla
Meaning
a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface that reduces visibility
Example
Dense fog covered the highway this morning.
La densa niebla cubrió la carretera esta mañana.
A1 verb /flaɪ/

fly

volar
Meaning
to move through the air using wings or in an aircraft
Example
Birds fly south for the winter.
Los pájaros vuelan hacia el sur para el invierno.
C2 noun /ˈfaɪər.brænd/

firebrand

persona revolucionaria
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.
El activista era un verdadero revolucionario, inspirando a todos a su alrededor para unirse a la protesta.
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.
B2 noun /ˈfɔːrmjələ/

formula

fórmula
Meaning
a fixed method for doing something; a mathematical or chemical rule expressed in symbols
Example
The scientist discovered a new formula for the medicine.
El científico descubrió una nueva fórmula para la medicina.
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.
B1 noun /ˈfɪnɪʃ laɪn/

finish line

meta
Meaning
The line or point at the end of a race or competition where participants complete it.
Example
She sprinted towards the finish line and won the race.
Ella corrió hacia la meta y ganó la carrera.
C1 noun flɛər

flair

habilidad natural
Meaning
A natural ability to do something well.
Example
She has a flair for design, always creating visually stunning work.
Ella tiene una habilidad especial para el diseño, siempre creando trabajos visualmente impresionantes.
B1 verb /fəʊld/

fold

doblar
Meaning
to bend something, especially paper or cloth, so that one part covers another
Example
She folded the letter neatly before placing it in the envelope.
Ella dobló la carta cuidadosamente antes de colocarla en el sobre.
A2 adverb /ˈfaɪ.nəl.i/

Finally

finalmente
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.
Después de años de arduo trabajo, ella finalmente alcanzó su meta.
C1 noun /faɪˈnælɪti/

finality

finalidad
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 decisión del juez le dio al caso una sensación de finalidad.
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.
C2 adjective/adverb /feɪn/

fain

gustosamente, con gusto
Meaning
gladly, willingly, or with pleasure
Example
I would fain help you if I had the time.
Si tuviera tiempo, con gusto te ayudaría.
B1 noun /ˈfɔːr.tʃən/

Fortune

fortuna; suerte; riqueza
Meaning
chance or luck as an external, arbitrary force affecting human affairs; a large amount of money or assets
Example
He made his fortune by investing wisely in technology companies.
Hizo su fortuna invirtiendo sabiamente en empresas tecnológicas.
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.
A2 noun, verb /fuːl/

fool

tonto
Meaning
a silly or stupid person; to trick someone
Example
He felt like a fool after believing the prank.
Se sintió como un tonto después de creer en la broma.
B1 verb /ˈfraɪtən/

frighten

asustar
Meaning
to cause fear or alarm in someone
Example
The loud noise frightened the child.
El ruido fuerte asustó al niño.
C2 verb /fɔɪst/

foist

imponer a la fuerza
Meaning
To impose something unwelcome or unnecessary on someone.
Example
He tried to foist his old books onto his friends.
Intentó imponer sus viejos libros a sus amigos.
C2 noun ˌfjuːmɪˈɡeɪʃən

fumigation

fumigación
Meaning
The practice of disinfecting or purifying an area using gas or smoke.
Example
Fumigation is an effective method to control pest infestations.
La fumigación es un método efectivo para controlar las infestaciones de plagas.
A2 adjective /ˈflaɪɪŋ/

flying

volando
Meaning
able to move through the air; related to flight or aircraft
Example
The flying bird disappeared into the clouds.
El pájaro volando desapareció entre las nubes.
A1 noun/verb /fɪʃ/

fish

felicidad
Meaning
an aquatic animal with gills, or to try to catch such animals
Example
He went to the lake to fish early in the morning.
Ella no pudo ocultar su felicidad cuando recibió el premio.
C2 noun /ˈfɔːrˌseɪl/

foresail

vela de proa
Meaning
The principal sail set on the foremast of a sailing vessel.
Example
The crew adjusted the foresail to catch the wind.
La tripulación ajustó la vela de proa para capturar el viento.
C2 verb /fleɪl/

flail

agitar o mover algo de manera salvaje; forcejear
Meaning
to wave or swing something about wildly; to thrash about
Example
He flailed his arms to keep afloat in the water.
Él agitó sus brazos para mantenerse a flote en el agua.
C2 verb /ˌfɔːrˈrʌn/

forerun

predecer
Meaning
To go before; to precede in time, place, or action.
Example
Dark clouds often forerun a storm.
Las nubes oscuras a menudo preceden una tormenta.
C1 adjective /fəˈroʊ.ʃəs/

Ferocious

feroz, salvaje, cruel
Meaning
savagely fierce, cruel, or violent; extremely aggressive
Example
The ferocious storm destroyed many houses in the coastal area.
La feroz tormenta destruyó muchas casas en la zona costera.
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 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 /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.
B2 noun /ˈfaɪbər/

fiber

fibra
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.
Las frutas y verduras son ricas en fibra.
B1 noun /fiː/

fee

tarifa
Meaning
A payment made for a service or privilege.
Example
The lawyer charged a high fee for his services.
El abogado cobró una tarifa alta por sus servicios.
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.
C2 adjective /ˈfɜːr.vɪd/

Fervid

apasionado; intensamente entusiasta; ardiente de emoción
Meaning
passionate; intensely enthusiastic; burning with emotion
Example
She gave a fervid speech about environmental protection.
Ella dio un discurso fervido sobre la protección del medio ambiente.
B2 noun ˈfeɪs tə ˈfeɪs ˈbætl

face-to-face battle

batalla cara a cara
Meaning
A direct confrontation or fight between opposing forces.
Example
The warriors fought a face-to-face battle with the enemies.
Los guerreros lucharon una batalla cara a cara con los enemigos.
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.
C2 adjective /ˈflaɪti/

flighty

inestable
Meaning
unstable, impulsive, or easily distracted; lacking seriousness or stability
Example
She’s too flighty to stick with one job for long.
Ella es demasiado inestable para quedarse en un solo trabajo por mucho tiempo.