fragility
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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.
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.
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.
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.
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.
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.
A2 noun/verb /fɛns/

fence

cerca
Meaning
a barrier, usually made of wood or wire, that surrounds an area; to enclose with a barrier
Example
They built a fence around the garden.
Ellos construyeron una cerca alrededor del jardín.
A1 adjective/noun /fɔːrθ/

fourth

cuarto
Meaning
Constituting number four in a sequence; coming after the third in position.
Example
He finished in fourth place in the race.
Terminó en el cuarto lugar en la carrera.
C1 verb ˈflʌk.tʃu.eɪt

fluctuate

fluctuar
Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
Los precios de las acciones fluctúan debido a las condiciones del mercado.
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.
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 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 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 noun ˈfreɪm.wɜːks

frameworks

marco
Meaning
A basic structure underlying a system, concept, or text; an essential supporting structure.
Example
Frameworks define the basis of systems.
Los marcos definen la base de los sistemas.
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.
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.
C2 noun /ˈfɪlɪɡri/

filigree

trabajo ornamental delicado, generalmente de oro o plata
Meaning
delicate ornamental work of fine wire, usually of gold or silver
Example
The necklace was decorated with intricate gold filigree.
El collar estaba decorado con intrincados filigríes de oro.
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.
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 /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.
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.
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.
B2 adverb /ˈfeɪθ.fəl.i/

Faithfully

fielmente
Meaning
in a loyal and steadfast manner; with dedication
Example
She faithfully attended every meeting despite her busy schedule.
Ella asistió fielmente a todas las reuniones a pesar de su apretada agenda.
C1 noun ˌfræɡ.mənˈteɪ.ʃən

fragmentation

fragmentación
Meaning
The process or state of breaking or being broken into fragments.
Example
Habitat fragmentation threatens many species.
La fragmentación del hábitat amenaza a muchas especies.
C2 adjective /ˈfiːtɪd/

foetid

hediondo
Meaning
having an offensive, unpleasant smell
Example
The foetid smell from the garbage made it hard to breathe.
El hedor del basurero hizo que fuera difícil respirar.
A1 noun /ˈfæməli/

family

familia
Meaning
A group consisting of parents and their children, or all the descendants of a common ancestor.
Example
She spends most of her weekends with her family.
Ella pasa la mayoría de sus fines de semana con su familia.
C2 adjective /fɪˈdjuːʃəl/

fiducial

fiducial, de referencia
Meaning
based on trust or confidence; serving as a standard of reference
Example
The fiducial point on the map ensures accurate measurements.
El punto fiducial en el mapa asegura mediciones precisas.
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.
C2 adjective /ˈfɪliəl/

filial

relacionado con un hijo o hija; mostrar respeto o afecto hacia los padres
Meaning
relating to a son or daughter; showing respect or affection toward parents
Example
He showed filial respect by caring for his aging parents.
Él mostró respeto filial cuidando a sus padres ancianos.
C2 verb /ˈflædʒəˌleɪt/

flagellate

azotar o flagelar a alguien como una forma de castigo o auto-disciplina
Meaning
to whip or flog someone, either literally or as a form of punishment or self-discipline
Example
In history, some monks would flagellate themselves as penance.
En la historia, algunos monjes se flagelaban como penitencia.
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.
A1 verb /ˈfɪnɪʃ/

finish

terminar
Meaning
to complete or bring to an end; to reach the final point
Example
She finished her homework before dinner.
Ella terminó su tarea antes de la cena.
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.
B1 adjective /feɪld/

failed

fallido
Meaning
not successful in achieving a desired result
Example
The project failed to meet the expectations.
El proyecto no logró cumplir con las expectativas.
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.
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.
C1 adjective /ˈfɛrəl/

feral

salvaje
Meaning
existing in a wild or untamed state; not domesticated
Example
The feral cat roamed the streets at night.
El gato salvaje rondaba por las calles por la noche.
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 /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.
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.
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.
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.
C2 adjective /ˈfɛstəl/

festal

relacionado con un festival, festivo
Meaning
relating to a festival or celebration
Example
The hall was decorated in a festal manner for the wedding.
El salón estaba decorado de manera festiva para la boda.
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.
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 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.
C2 verb /fɔːrˈfɛnd/

forfend

proteger, defender, evitar
Meaning
to protect or defend against something undesirable; to prevent
Example
May good fortune forfend any danger from our journey.
Que la buena fortuna proteja contra cualquier peligro en nuestro viaje.
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.
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 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 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.
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.
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 /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.
B1 verb /floʊt/

float

flotar
Meaning
to rest or move on the surface of a liquid or in the air without sinking
Example
The boat began to float gently down the river.
El bote comenzó a flotar suavemente por el río.
C2 verb /fɪltʃ/

filch

robar
Meaning
to steal something in a sneaky or petty way
Example
He tried to filch a candy bar from the shop.
Él intentó robar una barra de caramelo de la tienda.
B2 noun /ˈfɒsɪl/

fossil

fósil
Meaning
the remains or impression of a prehistoric plant or animal embedded in rock
Example
The fossil of a dinosaur was discovered in the mountains.
El fósil de un dinosaurio fue descubierto en las montañas.
A2 noun /ˈfɪŋ.ɡər/

Finger

dedo
Meaning
any of the four long thin parts of the hand (or five, if the thumb is included)
Example
She pointed with her finger to show the direction to the museum.
Ella señaló con su dedo para mostrar la dirección al museo.
B2 noun /fraɪt/

Fright

miedo; susto; pavor
Meaning
a sudden intense feeling of fear; a shock or surprise that causes fear
Example
The loud thunder gave her such a fright that she dropped her coffee cup.
El fuerte trueno le dio tal susto que dejó caer su taza de café.
C2 noun /ˈfʊl.krəm/

fulcrum

punto de apoyo
Meaning
The point or support on which a lever pivots; a central or essential point of activity or support.
Example
The teacher became the fulcrum of change in the school.
La maestra se convirtió en el fúlcrum del cambio en la escuela.
C1 noun /ˈflæn.əl/

Flannel

flanela
Meaning
a soft woven fabric, typically made of wool or cotton and slightly milled and raised
Example
He wore a warm flannel shirt in winter.
Él usó una camisa de flanela cálida en invierno.
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.
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.
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.
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.
A2 adjective /ˈfɪnɪʃt/

finished

terminado, completo
Meaning
completed or brought to an end
Example
The painting is finished and ready to display.
La pintura está terminada y lista para exhibir.
B2 adjective /ˈfes.tɪv/

Festive

festivo; alegre; de fiesta
Meaning
joyful; celebratory; having the characteristics of a festival
Example
The house looked festive with colorful decorations.
La casa se veía festiva con decoraciones coloridas.
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.
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.
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.
C1 adjective /ˌfʊl ˈbɒd.id/

full-bodied

de sabor intenso
Meaning
Having a strong, rich, and robust quality, especially of wine, coffee, or voice.
Example
He prefers a full-bodied red wine with his dinner.
Él prefiere un vino tinto de sabor intenso con su cena.
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 /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.
C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

fortuito
Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
Su encuentro fue completamente fortuito.
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 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.
B2 noun ˈflæʃkɑːrdz

flashcards

tarjetas didácticas
Meaning
Cards containing small amounts of information, held up for students to see, as an aid to learning.
Example
Flashcards help in quick memorization.
Las tarjetas didácticas ayudan en la memorización rápida.
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.
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.
B1 verb /fərˈbɪd/

forbid

prohibir
Meaning
to order someone not to do something
Example
The school forbids smoking on campus.
La escuela prohíbe fumar en el campus.
B2 verb /flɜːrt/

flirt

coquetear
Meaning
to behave as if you are attracted to someone, but not in a serious way
Example
She often flirts with her colleagues at work.
Ella a menudo coquetea con sus compañeros de trabajo.
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.
C2 noun /feɪnt/

feint

finta, movimiento engañoso
Meaning
a deceptive or pretended movement, especially in fighting or sports
Example
The boxer made a feint to the left before striking to the right.
El boxeador hizo una finta hacia la izquierda antes de golpear hacia la derecha.
C2 verb /fɔrˈswɛr/

forswear

renunciar
Meaning
to renounce or reject; to give up completely
Example
He forswore his old habits and started a new life.
Él renunció a sus viejos hábitos y empezó una nueva vida.
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 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 adjective /ˈfraʊzi/

frowzy

desaliñado
Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
Entró en la habitación con una apariencia desaliñada después de dormir en el sofá.
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.
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 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.
A2 verb /faɪt/

fight

pelear
Meaning
to engage in battle or combat; to struggle against
Example
The soldiers fight for their country.
Los soldados luchan por su país.
B2 verb /ˈfɪltər/

filter

filtrar
Meaning
to pass a substance through a device to remove unwanted material or to selectively pass certain items
Example
She used a coffee filter to separate the grounds from the liquid.
Ella usó un filtro de café para separar los posos del líquido.
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.
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.
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 adjective /fænˈtæstɪk/

Fantastic

fantástico; maravilloso; excelente
Meaning
extremely good; wonderful; excellent
Example
The movie was absolutely fantastic!
¡La película fue absolutamente fantástica!
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.
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.
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.
C2 adjective /fjuːˈɡeɪʃəs/

fugacious

fugaz
Meaning
Lasting only a short time; fleeting or ephemeral.
Example
Youth is beautiful but fugacious.
La juventud es hermosa pero fugaz.
B2 adjective /ˈfjʊə.ri.əs/

Furious

furioso; violento; enfurecido;
Meaning
extremely angry; violent; fierce;
Example
She was furious when she discovered the mistake.
Ella estaba furiosa cuando descubrió el error.
B2 noun/adjective /ˈfluːɪd/

fluid

líquido
Meaning
a substance that can flow easily, such as liquid or gas; smooth and adaptable
Example
The artist's fluid movements impressed the audience.
Los movimientos fluidos del artista impresionaron a la audiencia.
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.
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.
B1 adjective /ˈfæsɪneɪtɪŋ/

Fascinating

fascinante
Meaning
extremely interesting; captivating; enchanting
Example
The documentary about ocean life was fascinating.
El documental sobre la vida marina fue fascinante.
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.
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.
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.
C2 adjective /ˈfræk.ʃəs/

Fractious

irritable; problemático; difícil de controlar
Meaning
irritable and quarrelsome; difficult to control; bad-tempered
Example
The fractious child refused to follow any of the teacher's instructions.
El niño fractioso se negó a seguir cualquiera de las instrucciones del maestro.
C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

tolerancia a fallos
Meaning
The ability of a system to continue operating properly in the event of the failure of some of its components.
Example
Fault-tolerance ensures dependable systems.
La tolerancia a fallos asegura sistemas confiables.
B1 noun, verb /ˈfaɪ.næns/ or /fəˈnæns/

finance

finanzas
Meaning
the management of money and investments, or to provide funds for something
Example
The company secured finance from a major bank.
La compañía obtuvo financiamiento de un banco importante.
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.
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 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.
C2 noun /fiːf/

fief

un terreno de tierra otorgado bajo el sistema feudal; un dominio o área de control
Meaning
an estate of land held under the feudal system; a domain or area of control
Example
The knight was granted a fief by the lord for his service.
El caballero recibió un feudo del señor por su servicio.
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.
B2 noun /ˌfiː.ɑːnˈseɪ/

Fiance

prometido
Meaning
a man who is engaged to be married
Example
Sarah introduced her fiance to her parents during the family dinner.
Sara presentó a su prometido a sus padres durante la cena familiar.
A1 noun /fuːd/

food

comida
Meaning
any nutritious substance that people or animals eat or drink to maintain life and growth
Example
Rice is a common food in Asia.
El arroz es una comida común en Asia.
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.
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 noun /ˈfɔːrdʒəri/

forgery

falsificación
Meaning
the crime of making fake documents, money, or artworks
Example
The bank detected a forgery in the signature on the cheque.
El banco detectó una falsificación en la firma del cheque.