fluster
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C1 verb, noun /ˈflʌstər/

fluster

confundir
Meaning
to make someone agitated or confused
Example
The unexpected question flustered him.
La pregunta inesperada lo confundió.
C1 noun /ˈfɔːrˌbɛər/

forebear

antepasado
Meaning
An ancestor, especially one who lived a long time ago.
Example
He often speaks of his forebears with great respect.
Él habla a menudo de sus antepasados con mucho respeto.
B2 noun /ˈfɔːr.kæst/

Forecast

pronóstico
Meaning
a prediction or estimate of future events, especially coming weather conditions
Example
The weather forecast predicted heavy rain for the entire weekend.
El pronóstico del tiempo predijo lluvias intensas para todo el fin de semana.
B2 adjective /ˈfræntɪk/

frantic

desesperado
Meaning
Extremely anxious, hurried, or out of control due to fear or excitement.
Example
She made a frantic call to her family after the accident.
Ella hizo una llamada desesperada a su familia después del accidente.
B1 noun, verb /flæɡ/

flag

bandera, estandarte; o una señal de advertencia
Meaning
a piece of fabric with a symbol or colors; or to mark or signal attention
Example
They raised the national flag during the ceremony.
Ellos levantaron la bandera nacional durante la ceremonia.
A2 verb /fraɪ/

fry

freír
Meaning
to cook food in hot oil or fat
Example
She fries eggs for breakfast every morning.
Ella fríe huevos para el desayuno todas las mañanas.
C2 adverb /ˈfɔːrbi/

forby

además
Meaning
In addition; besides (archaic Scottish/English word).
Example
He is kind and generous, and wise forby.
Él es amable y generoso, y además sabio.
B2 adverb /ˈfɔːrmərli/

Formerly

anteriormente; antes
Meaning
in the past; previously; at an earlier time
Example
The building was formerly a school but is now a community center.
El edificio era anteriormente una escuela, pero ahora es un centro comunitario.
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.
A2 noun ˈfɔːrɪsts

Forests

bosques
Meaning
Large areas covered with trees and undergrowth, providing natural habitats for wildlife.
Example
Forests provide shelter and food for butterflies.
Los bosques proporcionan refugio y alimento para las mariposas.
B2 noun /flɛkˈsɪbɪləti/

flexibility

flexibilidad
Meaning
The quality of bending easily without breaking; willingness to change or compromise.
Example
The flexibility of the working hours made it easier to balance work and personal life.
La flexibilidad de los horarios de trabajo facilitó equilibrar el trabajo y la vida personal.
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.
C2 noun /flɛk/

fleck

mancha pequeña
Meaning
a small spot or mark, often of a different color
Example
There was a fleck of paint on the floor.
Había una mancha de pintura en el suelo.
C1 noun /ˈfjʊərɔːr/

furor

alboroto
Meaning
An outbreak of public anger or excitement.
Example
The politician's remarks created a furor in the media.
Los comentarios del político crearon un furor en los medios.
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.
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 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 noun /ˈfeɪvərɪtɪzəm/

favoritism

favoritismo
Meaning
the practice of giving unfair preferential treatment to one person or group
Example
The manager was accused of favoritism towards certain employees.
El gerente fue acusado de favoritismo hacia ciertos empleados.
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.
B1 noun /ˈflaʊər veɪs/

Flower-vase

jarrón de flores
Meaning
a decorative container used to hold cut flowers
Example
She placed beautiful roses in the flower vase on the table.
Ella colocó hermosas rosas en el florero sobre la mesa.
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.
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.
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 /ˈflaɪ.ɪŋ ˈkriː.tʃər/

Flying creature

criatura voladora
Meaning
any animal that has the ability to fly through the air
Example
Birds, bats, and insects are all examples of flying creatures.
Los pájaros, los murciélagos y los insectos son ejemplos de criaturas voladoras.
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.
B1 noun /ˈfʌŋkʃən/

function

función
Meaning
An activity or purpose natural to or intended for a person or thing.
Example
The main function of the heart is to pump blood.
La principal función del corazón es bombear sangre.
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.
B2 adjective /fəˈbɪd.ən/

Forbidden

prohibido; vetado; ilegal
Meaning
not allowed; prohibited; banned
Example
Smoking is strictly forbidden in this building.
Fumar está estrictamente prohibido en este edificio.
B2 verb /fʊlˈfɪl/

fulfil

cumplir
Meaning
to complete or achieve something that was expected or promised; to satisfy a requirement or desire
Example
She worked hard to fulfil her dream of becoming a doctor.
Trabajó duro para cumplir su sueño de convertirse en doctora.
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 verb /flɪt/

flit

revolotear
Meaning
to move quickly and lightly from one place to another
Example
Butterflies flitted from flower to flower.
Las mariposas revoloteaban de flor en flor.
C2 noun /ˈfɔːrˌpiːk/

forepeak

camarote de proa
Meaning
The compartment in the forward part of a ship, often used for storage.
Example
The sailors stored extra ropes in the forepeak.
Los marineros guardaron cuerdas extra en el camarote de proa.
A2 noun /ˈfer.i.teɪl/

Fairy-tale

cuento de hadas
Meaning
a children's story about magical and imaginary beings and lands
Example
Children love listening to fairy-tales before bedtime.
A los niños les encanta escuchar cuentos de hadas antes de acostarse.
C2 adjective /fəˈsiːʃəs/

facetious

humerístico
Meaning
Treating serious issues with deliberately inappropriate humor
Example
He was being facetious when he said he wanted to live on the moon.
Estaba siendo humerístico cuando dijo que quería vivir en la luna.
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.
C2 noun /ˈfɔːθ.raɪt.nəs/

forthrightness

franqueza
Meaning
The quality of being honest and straightforward; directness.
Example
Her forthrightness made her a respected journalist.
Su forthrightness la convirtió en una periodista respetada.
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.
C2 noun /ˈfoʊksl/

forecastle

castillo de proa
Meaning
The forward part of a ship below the deck, traditionally used as living quarters for the crew.
Example
The sailors gathered in the forecastle after their shift.
Los marineros se reunieron en el castillo de proa después de su turno.
C1 noun /ˈfænsiər/

fancier

aficionado
Meaning
a person who has a special interest in a particular thing or activity, especially animals or hobbies
Example
He is a fancier of rare birds.
Él es un aficionado a las aves raras.
C2 noun /ˈfɜːrðərəns/

furtherance

avance
Meaning
The advancement or promotion of something.
Example
The new policy was introduced in furtherance of social justice.
La nueva política se introdujo en pro de la justicia social.
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.
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.
B2 noun /ˈfjuːʒən/

fusion

fusión
Meaning
the process or result of joining two or more things together to form a single entity
Example
The restaurant offers a unique fusion of Asian and European cuisines.
El restaurante ofrece una fusión única de cocinas asiática y europea.
C1 noun /fɔːrˈkloʊʒər/

foreclosure

embargo hipotecario
Meaning
The legal process by which a lender takes control of a property from a borrower who has failed to make payments.
Example
The family lost their home due to foreclosure after missing several mortgage payments.
La familia perdió su casa debido al embargo hipotecario después de no pagar varias cuotas de la hipoteca.
C2 adjective /ˈfrɪski/

Frisky

vivaz; energético; juguetón; travieso
Meaning
lively; energetic; playful; mischievous
Example
The frisky puppy ran around the garden playfully.
El cachorro juguetón corrió alrededor del jardín de manera juguetona.
B2 noun /ˈfræk.ʃən/

Fraction

fracción; parte
Meaning
a numerical quantity that is not a whole number; a small or tiny part of something
Example
Only a small fraction of the population voted in the local election.
Solo una pequeña fracción de la población votó en las elecciones locales.
C1 verb /ˈflʌtər/

flutter

aletear / temblar
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.
La mariposa comenzó a aletear sus alas en la luz del sol.
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 noun /feɪt/

Fate

destino
Meaning
the development of events beyond a person's control, regarded as determined by a supernatural power
Example
Many people believe that fate determines the course of their lives.
Muchas personas creen que el destino determina el curso de sus vidas.
B1 adverb /ˈfɜːrstli/

firstly

primero
Meaning
used to introduce the first point or reason in a discussion or argument
Example
Firstly, we need to address the budget issue before proceeding.
Primero, necesitamos abordar el problema del presupuesto antes de continuar.
C2 adjective /ˈflʌməksd/

flummoxed

desconcertado
Meaning
Completely confused or bewildered.
Example
He looked flummoxed after hearing the strange question.
Él parecía desconcertado después de escuchar la extraña pregunta.
C2 noun /ˈfoʊ.li.oʊ/

folio

gran libro o manuscrito
Meaning
A sheet of paper folded once to form two leaves (four pages) of a book; also a term for a large book or manuscript.
Example
The library houses an ancient Shakespeare folio.
La biblioteca alberga un antiguo folio de Shakespeare.
C2 verb /frɪsk/

frisk

registrar
Meaning
To search a person by patting their clothing to check for concealed items.
Example
The security guard frisked the man at the entrance.
El guardia de seguridad registró al hombre en la entrada.
C1 noun /ˈfɛərˌɡraʊndz/

fairgrounds

terreno de feria
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.
El pueblo montó atracciones y puestos en el terreno de feria para el festival anual.
C2 noun /ˈfriːˌθɪŋkər/

freethinker

librepensador
Meaning
A person who forms opinions based on reason and independent thought rather than tradition or authority.
Example
Voltaire was considered a great freethinker of his time.
Voltaire fue considerado un gran librepensador de su tiempo.
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.
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.
B2 adjective /ˈfɛdərəl/

federal

federal
Meaning
Relating to the central government of a federation.
Example
The federal government passed a new law on healthcare.
El gobierno federal aprobó una nueva ley sobre atención sanitaria.
B2 adverb /ˈfɜ:rst hænd/

First-hand

de primera mano; directamente
Meaning
directly experienced or obtained; from the original source
Example
I experienced the earthquake first-hand.
Experimenté el terremoto de primera mano.
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.
B2 adjective /ˌfjuːtʃəˈrɪstɪk/

futuristic

futurista
Meaning
Having or involving very modern technology or design that is advanced beyond what is currently available
Example
Futuristic technologies are transforming industries worldwide.
Las tecnologías futuristas están transformando las industrias en todo el mundo.
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.
A1 noun ˈflaʊərz

Flowers

flor
Meaning
The reproductive structures of plants that provide nectar for butterflies.
Example
Butterflies are attracted to colorful flowers.
Las mariposas se sienten atraídas por las flores coloridas.
B2 noun /ˈfræɡ.mənt/

Fragment

fragmento; trozo;
Meaning
a small part broken or separated off something; an incomplete or isolated portion
Example
Archaeologists found fragments of ancient pottery buried in the soil.
Los arqueólogos encontraron fragmentos de cerámica antigua enterrados en el suelo.
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.
C2 adjective /fluːˈɛnʃəl/

fluential

influyente
Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
El orador influyente cautivó a toda la audiencia.
C2 noun /fəˈlɪsɪti/

felicity

felicidad
Meaning
intense happiness; the ability to find appropriate expression for one's thoughts
Example
She was known for her felicity in conversation and cheerful nature.
Era conocida por su felicidad en las conversaciones y su naturaleza alegre.
C1 noun /ˈfjuː.də.lɪ.zəm/

feudalism

feudalismo
Meaning
the social system in medieval Europe in which people worked and fought for nobles who gave them protection and land in return
Example
Feudalism shaped the political structure of medieval Europe.
El feudalismo moldeó la estructura política de la Europa medieval.
B1 adverb /ˈfriːkwəntli/

Frequently

frecuentemente; regularmente; muchas veces
Meaning
often; regularly; many times
Example
She frequently visits her grandmother on weekends.
Ella visita a su abuela con frecuencia los fines de semana.
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.
C2 noun /ˈflætʃələns/

flatulence

acumulación de gas en el sistema digestivo
Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
Comer frijoles a veces puede causar flatulencia.
B1 noun /frʌˈstreɪʃən/

frustration

frustración
Meaning
The feeling of being upset or annoyed due to inability to achieve something.
Example
He felt deep frustration when his plans failed.
Sintió una profunda frustración cuando sus planes fracasaron.
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.
C2 verb /ˈfrɪtər/

fritter

desperdiciar
Meaning
To waste time, money, or energy on trivial matters.
Example
He frittered away his savings on unnecessary gadgets.
Él desperdició sus ahorros en gadgets innecesarios.
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.
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.
C2 adjective /ˈfiːbəlˌmaɪndɪd/

feebleminded

tonto o de mente débil
Meaning
lacking intelligence or mental capacity; foolish or weak-minded
Example
The feebleminded man struggled to understand basic instructions.
El hombre de mente débil luchaba por entender instrucciones básicas.
B2 noun /ˈfɛmənɪst/

feminist

feminista
Meaning
a person who supports equal rights and opportunities for women and men
Example
She proudly calls herself a feminist and fights for gender equality.
Ella orgullosamente se llama a sí misma feminista y lucha por la igualdad de género.
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 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.
El gobierno introdujo nuevas políticas fiscales para controlar la inflación.
B1 noun /ˈfaɪər.mən/

Fireman

bombero
Meaning
a person whose job is to extinguish fires and rescue people
Example
The brave fireman rescued the family from the burning building.
El valiente bombero rescató a la familia del edificio en llamas.
C2 adjective /ˈfɪt.fəl/

fitful

intermitente
Meaning
occurring in irregular bursts; not continuous or steady
Example
He had a fitful sleep due to the storm.
Él tuvo un sueño intermitente debido a la tormenta.
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.
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.
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 /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.
B2 adjective /ˈfruːt.fəl/

Fruitful

fructífero; beneficioso; exitoso;
Meaning
productive; beneficial; successful;
Example
Our discussion was very fruitful and led to many new ideas.
Nuestra discusión fue muy fructífera y condujo a muchas ideas nuevas.
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 /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, 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 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.
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 /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.
C2 verb /ˈflʌməks/

flummox

confundir
Meaning
To confuse or bewilder someone completely.
Example
The complicated puzzle flummoxed the students.
El complicado rompecabezas confundió a los estudiantes.
C1 verb /ˈfrɒlɪk/

frolic

jugar alegremente
Meaning
to play and move about cheerfully, energetically, or playfully
Example
The children frolicked in the garden all afternoon.
Los niños jugaron alegremente en el jardín toda la tarde.
A2 noun /ˈfiːtʃər/

feature

característica
Meaning
a distinctive attribute or aspect of something; a characteristic
Example
The new phone has a unique camera feature.
El nuevo teléfono tiene una característica única de cámara.
B2 adjective, noun /ˈfeɪʃəl/

facial

facial
Meaning
Relating to the face; a beauty treatment for the face
Example
She booked a facial at the spa.
Ella reservó un facial en el spa.
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.
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.
C2 noun /ˈfrækɑː/

fracas

escándalo
Meaning
A noisy disturbance or quarrel.
Example
The fracas outside the bar drew the attention of the police.
El escándalo fuera del bar llamó la atención de la policía.
C2 noun /ˌfɔːrɔːrdɪˈneɪʃən/

foreordination

preordenación
Meaning
the act of determining something in advance; predestination
Example
The doctrine of foreordination suggests that events are fixed by divine will.
La doctrina de la preordenación sugiere que los eventos están fijados por la voluntad divina.
B2 noun /ˈfrʌn.tɪər/

frontier

frontera o nuevo campo
Meaning
A new area of activity, knowledge, or development; the edge of knowledge or achievement.
Example
Robotic surgery is exploring a new frontier in medicine.
La cirugía robótica está explorando una nueva frontera en la medicina.
C1 verb/noun ˈfæð.əm

fathom

entender
Meaning
To understand after much thought; to measure the depth of water; to comprehend.
Example
It is difficult to fathom the depths of the ocean.
Es difícil entender las profundidades del océano.
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.
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.
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.
B2 adverb /ˌfʌndəˈmɛntəli/

fundamentally

fundamentalmente
Meaning
in a basic and important way; at the core
Example
The two theories are fundamentally different.
Las dos teorías son fundamentalmente diferentes.
A2 noun /ˈfoʊldər/

folder

carpeta
Meaning
a container or directory used to store and organize papers or digital files
Example
I saved all the photos in a separate folder.
Guardé todas las fotos en una carpeta separada.
B2 noun /ˈfaɪ.bər/

fibre

fibra
Meaning
A thread or filament from which a vegetable tissue, mineral substance, or textile is formed; dietary material that aids digestion.
Example
Eating foods rich in fibre can improve your digestion.
Comer alimentos ricos en fibra puede mejorar tu digestión.
B2 noun /ˈfɜːrneɪs/

furnace

horno
Meaning
an enclosed structure in which heat is produced for a building or for melting metal
Example
The factory's furnace melted the metal quickly.
El horno de la fábrica fundió el metal rápidamente.
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.
B2 adjective, noun, verb /faʊl/

foul

sucio, injusto
Meaning
offensive to the senses; dirty or unpleasant; in sports, an unfair or illegal act
Example
The player was penalized for committing a foul.
El jugador fue penalizado por cometer una falta.
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.
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.
C1 adjective /flæmˈbɔɪənt/

flamboyant

llamativo, colorido o confiado
Meaning
showy, strikingly bold or colorful; confident and lively
Example
His flamboyant style drew everyone's attention at the party.
Su estilo llamativo atrajo la atención de todos en la fiesta.
C2 adjective /fækˈtɪʃəs/

factitious

artificial, no genuino
Meaning
artificial or fabricated; not natural or genuine
Example
The excitement in his story seemed factitious and forced.
La emoción en su historia parecía artificial y forzada.
B2 noun /ˈfaʊn.tən/

Fountain

fuente
Meaning
a natural spring of water; an artificial structure from which water flows
Example
The fountain in the park attracts many visitors.
La fuente en el parque atrae a muchos visitantes.
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.
C2 adjective /ˈfæl.oʊ/

fallow

barbecho
Meaning
Describing land that is left unplanted for a period to restore its fertility, allowing soil to recover nutrients and break pest and disease cycles.
Example
Farmers leave their fields fallow to restore soil fertility.
Los agricultores dejan sus campos en barbecho para restaurar la fertilidad del suelo.
C2 adjective /ˈfæð.əm.ləs/

fathomless

incomprensible o insondable
Meaning
impossible to understand or measure; very deep
Example
The ocean seemed fathomless as it stretched to the horizon.
El océano parecía incomprensible cuando se extendía hasta el horizonte.
C2 adjective /ˈfrɒθi/

frothy

espumoso
Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
Ella pidió una taza de capuchino espumoso.