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B1 adverb /ˈfʊli/

fully

completamente
Meaning
completely or entirely; to the fullest extent
Example
She is fully aware of the risks.
Ella está completamente consciente de los riesgos.
A1 noun /frɛnd/

friend

amigo
Meaning
a person with whom one has a bond of mutual affection
Example
He is my best friend.
Él es mi mejor amigo.
C2 adjective /ˈflɪpənt/

flippant

despectivo
Meaning
not showing a serious or respectful attitude
Example
His flippant remarks annoyed the teacher.
Sus comentarios despectivos molestaron al maestro.
B2 noun ˈfrʌn.tɪərz

frontiers

fronteras
Meaning
The extreme limit of settled land beyond which lies wilderness; the limits of knowledge or achievement in a particular field.
Example
The project pushes the frontiers of space exploration.
El proyecto expande las fronteras de la exploración espacial.
C2 noun /ˈfjʊr.ʌŋ.kəl/

Furuncle

forúnculo; bulto;
Meaning
a painful pus-filled bump under the skin caused by infected, inflamed hair follicles
Example
The doctor prescribed antibiotics to treat the painful furuncle on his neck.
El doctor recetó antibióticos para tratar el doloroso furúnculo en su cuello.
A2 noun fɔːrs

force

fuerza
Meaning
A physical power or energy that can cause movement, change, or influence.
Example
Strong nuclear force binds particles.
La fuerte fuerza nuclear une las partículas.
B2 noun /ˈflɒrɪst/

florist

florista
Meaning
A person who sells and arranges flowers.
Example
We bought a bouquet from the local florist.
Compramos un ramo en el florista local.
A2 verb /feɪl/

fail

fracasar
Meaning
to not succeed in achieving something; to be unsuccessful
Example
He failed to complete the assignment on time.
Él fracasó en completar la tarea a tiempo.
B2 noun fəˈtɪl.ɪ.ti

fertility

fertilidad
Meaning
The quality of being fertile; fruitfulness.
Example
Fertility of the soil is crucial for farming.
La fertilidad del suelo es crucial para la agricultura.
B1 adjective /ˈfæbjələs/

Fabulous

fabuloso; increíble; extraordinario
Meaning
extremely good; wonderful; extraordinary
Example
She wore a fabulous dress to the party.
Ella llevaba un vestido fabuloso a la fiesta.
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.
B1 noun /ˈfɪkʃən/

fiction

ficción
Meaning
Literature created from the imagination, not presented as fact.
Example
She enjoys reading science fiction novels.
A ella le gusta leer novelas de ciencia ficción.
A1 noun /fruːt/

fruit

fruta
Meaning
The sweet and fleshy product of a plant that contains seeds.
Example
Mango is my favorite fruit.
El mango es mi fruta favorita.
B2 noun /ˌfiː.ɑːnˈseɪ/

Fiancee

prometida
Meaning
a woman who is engaged to be married
Example
John bought a beautiful engagement ring for his fiancee.
John compró un hermoso anillo de compromiso para su prometida.
A2 verb /fɪks/

fix

arreglar
Meaning
To repair or make something work again.
Example
The mechanic fixed the broken car.
El mecánico arregló el coche roto.
B2 noun /ˈfleɪvər/

flavor

sabor
Meaning
The distinctive taste of a food or drink.
Example
This ice cream has a delicious mango flavor.
Este helado tiene un delicioso sabor a mango.
B1 adjective /ˈfluː.ənt/

Fluent

fluido; elocuente
Meaning
able to speak a language easily and accurately; flowing smoothly and gracefully
Example
She is fluent in three languages including English and French.
Ella es fluida en tres idiomas, incluidos el inglés y el francés.
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.
B2 noun /ˈfɪŋ.ɡər.prɪnt/

Fingerprint

huella dactilar
Meaning
an impression or mark made on a surface by a person's fingertip; unique identification pattern
Example
The police found his fingerprints on the door handle at the crime scene.
La policía encontró sus huellas dactilares en la manija de la puerta en la escena del crimen.
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 adjective /ˈfruː.ɡəl/

Frugal

ahorrativo; económico;
Meaning
economical; thrifty;
Example
She is very frugal and saves money by buying only necessary items.
Ella es muy ahorrativa y ahorra dinero comprando solo lo necesario.
B2 noun /ˈfleɪ.vər/

Flavour

sabor
Meaning
the distinctive taste of a food or drink; a particular quality or atmosphere
Example
The soup had a rich flavour of herbs and spices from the garden.
La sopa tenía un rico sabor de hierbas y especias del jardín.
B1 noun freɪm

Frame

marco
Meaning
A rigid structure that surrounds something such as a picture, door, or windowpane.
Example
A framed family tree can be displayed in your home.
Un árbol genealógico enmarcado puede exhibirse en tu hogar.
C2 noun /fluː/

flue

conducto de humos
Meaning
A pipe or channel for smoke and waste gases produced by a fire, gas heater, or power station.
Example
The chimney flue needs to be cleaned regularly.
El conducto de humos de la chimenea necesita ser limpiado regularmente.
A2 adjective /flæt/

flat

plano
Meaning
Smooth and level, without raised areas or curves.
Example
The road ahead was completely flat.
El camino adelante estaba completamente plano.
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.
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.
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 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.
C2 noun /fiːˈkʌndɪti/

fecundity

fecundidad, fertilidad
Meaning
the ability to produce an abundance of offspring or new growth; fertility
Example
The fecundity of the river delta supports diverse wildlife.
La fecundidad del delta del río apoya la diversidad de la vida silvestre.
B2 noun /ˈfæntəsi/

fantasy

fantasía
Meaning
a creation of the imagination, especially something improbable or impossible
Example
She has a vivid fantasy about traveling to space.
Ella tiene una vívida fantasía sobre viajar al espacio.
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.
B2 noun /ˈfriːˌlænsər/

freelancer

trabajador independiente
Meaning
A person who works independently without being permanently employed by one organization.
Example
She works as a freelancer designing websites for different clients.
Ella trabaja como freelancer diseñando sitios web para diferentes clientes.
B2 verb /ˈfæsən/

fasten

abrochar
Meaning
To attach or secure something firmly in place
Example
Please fasten your seatbelt before the plane takes off.
Por favor, abroche su cinturón antes de que despegue el avión.
C2 adjective/noun /fɪˈduː.ʃi.er.i/

fiduciary

fiduciario
Meaning
Involving trust, especially with regard to the relationship between a trustee and a beneficiary.
Example
Banks have fiduciary duties towards their clients.
Los bancos tienen deberes fiduciarios hacia sus clientes.
C2 noun /ˈfuːləri/

foolery

necedad
Meaning
Silly or foolish behavior or actions.
Example
His constant foolery made the meeting hard to take seriously.
Su constante necedad hizo que la reunión fuera difícil de tomar en serio.
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.
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.
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.
C1 adjective /ˈfɔːrmətɪv/

formative

formativo
Meaning
Having a lasting influence on a person's development or character.
Example
Childhood is often described as a formative stage in life.
La infancia a menudo se describe como una etapa formativa en la vida.
A2 adjective /fer/

Fair

justo; razonable; atractivo
Meaning
just and reasonable; treating people equally; light in color; attractive
Example
The judge made a fair decision in the case.
El juez tomó una decisión justa en el caso.
C2 verb /flɛdʒ/

fledge

emergir
Meaning
To develop wing feathers large enough for flight; to bring up until able to fly.
Example
The young birds will fledge in a few weeks.
Los pájaros jóvenes volarán en unas pocas semanas.
C2 noun /ˈfɜːrnəri/

fernery

fernería, lugar donde se cultivan helechos
Meaning
a place or greenhouse where ferns are cultivated
Example
The garden's fernery was full of exotic plants.
La jardinera estaba llena de plantas exóticas en la fernería.
A2 noun /ˈfɔːrənər/ or /ˈfɑːrənər/

foreigner

extranjero
Meaning
A person from another country.
Example
The city welcomes every foreigner with kindness.
La ciudad recibe a cada extranjero con amabilidad.
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.
B2 noun, verb /ˈfaɪlɪŋ/

filing

presentación de documentos; organización de papeles
Meaning
the act of submitting documents; the process of organizing papers
Example
The lawyer handled the filing of all court documents.
El abogado manejó la presentación de todos los documentos judiciales.
A2 adjective /fɪt/

Fit

apropiado; adecuado; saludable; en buena forma física; listo
Meaning
suitable; appropriate; healthy; in good physical condition; ready
Example
He is fit and healthy.
Él está en forma y saludable.
C1 verb /fɔrˈstɔl/

forestall

prevenir de antemano
Meaning
to prevent by acting in advance; to anticipate and counter
Example
They forestalled the crisis by taking immediate action.
Ellos evitaron la crisis tomando acción inmediata.
B2 noun /frɔːd/

Fraud

fraude
Meaning
wrongful or criminal deception intended to result in financial or personal gain
Example
The company was investigated for credit card fraud and money laundering.
La empresa fue investigada por fraude con tarjeta de crédito y lavado de dinero.
C1 noun /frɪˈvɒləti/

frivolity

frivolidad
Meaning
Lack of seriousness; silly or trivial behavior.
Example
The teacher discouraged frivolity during the exam.
El profesor desalentó la frivolidad durante el examen.
B2 verb fəˈsɪl.ɪ.teɪt

facilitate

facilitar
Meaning
Make an action or process easier or more achievable; to help bring about.
Example
Good infrastructure facilitates economic growth.
La buena infraestructura facilita el crecimiento económico.
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.
A1 adjective /ˈfeɪ.məs/

famous

famoso
Meaning
Known about by many people; renowned.
Example
This area is famous for its unique heritage.
Esta área es famosa por su herencia única.
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!
B2 noun /flɔː/

flaw

defecto
Meaning
a defect or imperfection in something
Example
The diamond had a small flaw that was barely visible.
El diamante tenía un pequeño defecto que apenas se veía.
B2 noun fəˈtiːɡ

fatigue

fatiga
Meaning
Physical or mental exhaustion due to prolonged exertion or mental stress
Example
Lack of sleep leads to extreme fatigue.
La falta de sueño conduce a una fatiga extrema.
B1 noun /ˈfʌndɪŋ/

funding

financiación
Meaning
financial support for a project or organization
Example
The startup is seeking funding from investors.
La startup está buscando financiación de inversores.
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.
C2 noun /ˈfɪɡmənt/

figment

invención, imaginación
Meaning
something invented or imaginary; a fabrication of the mind
Example
The story of the haunted house is just a figment of her imagination.
La historia de la casa embrujada es solo un producto de su imaginación.
B2 verb /flɪk/

flick

dar un golpe rápido
Meaning
to move or cause to move with a sudden quick motion
Example
He flicked the switch to turn on the light.
Él flickó el interruptor para encender la luz.
B2 adjective /ˈfɛmənɪn/

feminine

femenino
Meaning
having qualities traditionally associated with women; feminine in nature
Example
She has a very feminine style of dressing.
Ella tiene un estilo muy femenino de vestir.
A2 noun /ˈfɪɡ.jər/

Figure

figura; imagen; número;
Meaning
a number, especially one which forms part of official statistics; the shape of a human body
Example
The sales figure for this quarter exceeded all expectations.
La cifra de ventas de este trimestre superó todas las expectativas.
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.
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.
C1 noun /ˈfɪʃˌmʌŋ.ɡər/

fishmonger

pescadero
Meaning
a person or store that sells fish
Example
I bought fresh salmon from the local fishmonger.
Compré salmón fresco del pescadero local.
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.
A1 noun /faɪər/

Fire

fuego
Meaning
combustion or burning, in which substances combine chemically with oxygen from the air
Example
The fire in the fireplace provided warmth and a cozy atmosphere.
El fuego en la chimenea proporcionó calor y un ambiente acogedor.
A2 verb /fiːd/

feed

alimentar
Meaning
to give food to a person or animal
Example
She feeds the birds every morning.
Ella alimenta a los pájaros todas las mañanas.
B2 noun /ˈfɪlmˌmeɪkər/

filmmaker

cineasta
Meaning
a person who makes films, typically as a profession
Example
He is a well-known filmmaker in the industry.
Es un cineasta muy conocido en la industria.
C1 adverb /ˈfɪksɪdli/

Fixedly

fijamente
Meaning
in a steady, unmoving manner; with intense concentration
Example
He stared fixedly at the painting.
Él miró fijamente la pintura.
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.
C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

baño frío
Meaning
a large cold pool in ancient Roman baths used for cooling off after hot baths
Example
The ruins of the Roman frigidarium are still visible today.
Las ruinas del frigidarium romano todavía son visibles hoy en día.
B2 noun /ˈfriː.kwən.si/

Frequency

frecuencia
Meaning
the rate at which something occurs or is repeated over a particular period of time
Example
The frequency of earthquakes in this region has increased dramatically over the past decade.
La frecuencia de los terremotos en esta región ha aumentado drásticamente en la última década.
B2 verb /fɔɪl/

foil

frustrar
Meaning
To prevent something (especially a plan) from succeeding.
Example
The police foiled the robbery attempt.
La policía frustró el intento de robo.
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.
B1 adjective /ˈfriːkwənt/

Frequent

frecuente
Meaning
happening often; occurring regularly; repeated
Example
He makes frequent visits to his grandmother.
él hace visitas frecuentes a su abuela.
A1 adverb /fɑːr/

far

lejos
Meaning
at, to, or by a great distance
Example
The school is far from my house.
La escuela está lejos de mi casa.
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.
A2 verb /fɪl/

fill

llenar
Meaning
to make or become full; to put something into a container until it is full
Example
Please fill the glass with water.
Por favor, llene el vaso con agua.
B2 adjective /ˈfraɪtfəl/

frightful

espantoso
Meaning
causing fear or horror; very unpleasant
Example
The hikers faced frightful weather conditions on the mountain.
Los excursionistas enfrentaron condiciones climáticas espantosas en la montaña.
C1 adjective /ˈfrɔːdjʊlənt/

fraudulent

fraudulento
Meaning
Involving or using deceit, especially criminal deception.
Example
He was arrested for making fraudulent insurance claims.
Él fue arrestado por hacer reclamaciones fraudulentas de seguros.
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.
B2 adverb /ˈfɜ:rmli/

Firmly

firmemente
Meaning
in a strong, steady, and unwavering manner
Example
She firmly believed in her decision.
Ella creía firmemente en su decisión.
A2 verb ˈfoʊkəs

focus

enfocar
Meaning
To concentrate attention or effort on something; to direct one's attention or efforts towards a particular activity, subject, or problem.
Example
Focus on what truly matters to simplify your life.
Concéñtrate en lo que realmente importa para simplificar tu vida.
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.
B1 noun /ˈfeɪ.vər/

Favour

favor; ayuda; bondad
Meaning
approval, support, or liking for someone or something; a kind or helpful act
Example
Could you do me a favour and help me move this heavy box?
¿Podrías hacerme un favor y ayudarme a mover esta caja pesada?
A2 noun /frɪdʒ/

fridge

nevera
Meaning
a household appliance used to keep food and drinks cold to preserve freshness
Example
I put the milk back in the fridge after breakfast.
Puse la leche en la nevera después del desayuno.
B2 noun ˈfreɪm.wɜːk

framework

marco
Meaning
An essential supporting structure of a building, vehicle, or object; a basic structure underlying a system, concept, or text.
Example
A strong framework is vital for governance.
Un marco fuerte es vital para la gobernanza.
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.
C1 noun /fruˈɪʃən/

fruition

cumplimiento
Meaning
The realization or fulfillment of a plan, project, or desire.
Example
Her dream of becoming a doctor finally came to fruition.
El sueño de convertirse en doctora finalmente se hizo realidad.
B2 verb /ˈfrʌsˌtreɪt/

frustrate

frustrar
Meaning
to prevent from accomplishing; to make someone feel annoyed
Example
The traffic jam frustrated all the commuters.
El embotellamiento de tráfico frustró a todos los pasajeros.
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 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 /frɒnd/

frond

hoja
Meaning
A large, divided leaf of a fern, palm, or similar plant.
Example
The fern's frond stretched gracefully over the garden path.
La hoja del helecho se estiró graciosamente sobre el camino del jardín.
B2 noun /ˈfrɛʃnəs/

freshness

frescura
Meaning
The quality of being new, clean, and full of energy.
Example
The freshness of the morning air made everyone feel alive.
La frescura del aire de la mañana hizo que todos se sintieran vivos.
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.
C2 verb /ˈfʊl.mɪ.neɪt/

fulminate

protestar enérgicamente
Meaning
To express strong protest or criticism loudly and forcefully; to explode violently.
Example
The politician began to fulminate against corruption.
El político comenzó a protestar enérgicamente contra la corrupción.
B2 verb /ˈflætər/

flatter

alabar excesivamente o insinceramente para ganar favor
Meaning
to praise excessively or insincerely to gain favor
Example
He tried to flatter his boss to get a promotion.
Él intentó halagar a su jefe para obtener una promoción.
A2 adjective /ˈfɔːrən/ or /ˈfɑːrən/

foreign

extranjero
Meaning
Belonging to or coming from another country.
Example
She loves studying foreign languages.
A ella le encanta estudiar lenguas extranjeras.
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.
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.
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.
B2 verb /feɪnt/

faint

desmayarse
Meaning
to lose consciousness for a short time because of a temporary lack of oxygen to the brain
Example
He felt dizzy and fainted in the heat.
Se sintió mareado y se desmayó por el calor.
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 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 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 noun ˈflɔː.rə ænd ˈfɔː.nə

flora and fauna

flora y fauna
Meaning
The plants and animals of a particular region, habitat, or geological period.
Example
The Galápagos Islands have unique flora and fauna.
Las Islas Galápagos tienen una flora y fauna únicas.
A2 determiner/adjective /ˈfjuːər/

fewer

menos
Meaning
a smaller number of; not as many
Example
Fewer people attended the meeting than expected.
Menos personas asistieron a la reunión de lo esperado.
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.
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.
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.
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.
A2 noun /fɒks/

Fox

zorro
Meaning
a wild animal related to dogs, with a pointed face and thick fur
Example
The red fox is known for its cunning nature.
El zorro rojo es conocido por su astucia.
C1 adjective /ˈfaɪ.naɪt/

Finite

finito; limitado
Meaning
limited; having bounds or limits; not infinite
Example
Earth has finite natural resources.
La Tierra tiene recursos naturales finitos.
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.
A2 adjective /frɛʃ/

fresh

fresco
Meaning
new, recently made, or clean and pure
Example
The bread is still fresh from the oven.
El pan sigue fresco del horno.
C2 verb /ˈfɛtər/

fetter

atar, restringir
Meaning
to restrain or restrict someone’s freedom
Example
The strict rules fettered the creativity of the students.
Las reglas estrictas limitaban la creatividad de los estudiantes.
A2 noun /flaɪt/

flight

vuelo / vuelo
Meaning
the act of flying, typically through the air; or a scheduled trip by an aircraft
Example
Our flight to London was delayed due to bad weather.
Nuestro vuelo a Londres se retrasó debido al mal tiempo.
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.
C2 noun /ˈfæn.feər/

fanfare

gran pompa, publicidad
Meaning
a short ceremonial tune or display of publicity to attract attention
Example
The new product was launched with much fanfare.
El nuevo producto fue lanzado con gran pompa.
B1 adverb /ˈfeər.li/

Fairly

justamente; moderadamente; razonablemente
Meaning
in a just manner; moderately; reasonably
Example
The test was fairly easy, but some questions were challenging.
El examen fue bastante fácil, pero algunas preguntas fueron desafiantes.