firework
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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.
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.
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.
A2 noun/verb /ˈfɪʃɪŋ/

fishing

pesca
Meaning
the activity of catching fish
Example
Fishing is a popular activity in coastal villages.
La pesca es una actividad popular en las aldeas costeras.
C1 verb /ˈfɪdʒɪt/

fidget

moverse inquieto, estar inquieto
Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
El niño empezó a moverse durante la larga conferencia.
C2 verb /ˈfrɪzəl/

frizzle

freír hasta que se vuelva crujiente y rizado
Meaning
to fry something until it becomes crisp and curled, or to make a sizzling noise
Example
The bacon began to frizzle in the pan.
El tocino comenzó a chisporrotear en la sartén.
B1 noun /fæts/

fats

grasas
Meaning
Essential macronutrients that provide energy, support cell growth, and protect organs while helping absorb vitamins.
Example
Healthy fats from nuts and avocados support brain function.
Las grasas saludables de los frutos secos y los aguacates apoyan la función cerebral.
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.
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.
C2 noun /fɔːrˈbɛrəns/

forbearance

tolerancia
Meaning
Patient self-control; restraint and tolerance, especially in difficult situations.
Example
She showed remarkable forbearance during the heated argument.
Ella mostró una notable tolerancia durante la acalorada discusión.
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.
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.
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 /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.
B2 noun ˈfjuː.tʃɚ ˌdʒen.əˈreɪ.ʃənz

future generations

futuras generaciones
Meaning
People who have not yet been born, considered in terms of the environment or society they will inherit.
Example
Sustainable development ensures a better life for future generations.
El desarrollo sostenible asegura una mejor vida para las futuras generaciones.
A2 adjective /fɪfθ/

fifth

quinto
Meaning
constituting number five in a sequence
Example
She lives on the fifth floor of the building.
Ella vive en el quinto piso del edificio.
C1 noun /ˈfɔːrˌθɔːt/

forethought

previsión
Meaning
careful consideration of what will be necessary or may happen in the future
Example
With a little forethought, we could have avoided the problem.
Con un poco de previsión, podríamos haber evitado el problema.
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.
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 adverb, adjective, verb, noun /ˈfɔːrwərd/

forward

adelante
Meaning
toward the front; to advance or send ahead; an onward position or direction
Example
The troops moved forward to secure the bridge.
Las tropas se movieron hacia adelante para asegurar el puente.
A1 noun /ˈfɑːðər/

father

felicidad
Meaning
A male parent of a child.
Example
His father taught him how to ride a bicycle.
Ella no pudo esconder su felicidad cuando recibió el premio.
C2 noun /foʊl fʊt/

Foal-foot

flor de pezuña de caballo
Meaning
a yellow flowering plant with leaves shaped like a horse's hoof, also known as coltsfoot
Example
The foal-foot plant grows wild in many meadows and is often the first flower to bloom in spring.
La planta de pezuña de caballo crece silvestre en muchos prados y a menudo es la primera flor en florecer en primavera.
C1 adjective /ˈflaʊəri/

flowery

florido / ornamentado
Meaning
Full of flowers or overly elaborate in style or language.
Example
She wrote a flowery letter filled with poetic phrases.
Ella escribió una carta florida llena de frases poéticas.
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.
A2 noun /ˈfrɛndʃɪp/

friendship

amistad
Meaning
A close and trusting relationship between two or more people.
Example
Their friendship has lasted since childhood.
Su amistad ha perdurado desde la infancia.
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.
C1 noun /fɔːrˈmæl.ə.ti/

Formality

formalidad
Meaning
the rigid observance of rules of convention or etiquette; a thing done simply to comply with requirements
Example
The signing of the contract was just a formality; the deal was already agreed upon.
La firma del contrato fue solo una formalidad; el acuerdo ya estaba acordado.
B2 noun /ˈfɜː.tɪ.laɪ.zər/

fertilizer

fertilizante
Meaning
a substance added to soil to make plants grow more successfully
Example
Farmers use fertilizer to increase crop production.
Los agricultores usan fertilizante para aumentar la producción de cultivos.
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.
B2 noun /ˈfreʃmən/

freshman

estudiante de primer año
Meaning
a first-year student at a high school, college, or university
Example
The freshman felt nervous on his first day at university.
El estudiante de primer año se sintió nervioso en su primer día en la universidad.
B2 adjective /ˈflɔː.ləs/

Flawless

perfecto; sin defectos
Meaning
perfect; without any defects or faults; immaculate
Example
Her flawless performance earned her a standing ovation.
Su actuación perfecta le valió una ovación de pie.
C2 noun /friːz/

frieze

friso
Meaning
a decorative horizontal band, often sculpted or painted, usually on a wall near the ceiling
Example
The frieze above the entrance depicts scenes from ancient mythology.
El friso sobre la entrada representa escenas de la mitología antigua.
C2 noun /ˈfʌstɪən/

fustian

discurso pomposo
Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
El discurso del político estaba lleno de fustián y promesas vacías.
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.
A2 adjective /faɪn/

Fine

bueno; excelente; delgado; delicado; de alta calidad
Meaning
good; excellent; thin; delicate; high quality
Example
The weather is fine today.
Hoy hace buen tiempo.
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.
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.
A2 adjective /fəˈmɪl.jər/

Familiar

familiar; conocido; informal y amistoso
Meaning
well-known; easily recognized; having knowledge of; informal and friendly
Example
This song sounds familiar to me.
Esta canción me suena familiar.
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.
B2 adverb /ˈfræŋkli/

Frankly

francamente; abiertamente;
Meaning
honestly; openly; in a direct manner
Example
Frankly, I think this plan needs more consideration.
Francamente, creo que este plan necesita más consideración.
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 /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.
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.
C1 verb /ˈfɔːltər/

falter

vacilar o perder fuerza o impulso
Meaning
to hesitate or lose strength or momentum
Example
Her voice faltered as she delivered the speech.
Su voz vaciló mientras pronunciaba el discurso.
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.
B2 verb, noun, adjective /flʌʃ/

flush

ponerse rojo / limpiar con agua
Meaning
to become red in the face, usually from embarrassment, heat, or excitement; to clean something with a flow of water
Example
She flushed with embarrassment when she realized her mistake.
Ella se sonrojó de vergüenza cuando se dio cuenta de su error.
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.
B1 adjective /ˈfrʌstreɪtɪd/

frustrated

frustrado
Meaning
feeling annoyed or upset because of inability to achieve something
Example
She felt frustrated after failing the exam.
Ella se sintió frustrada después de reprobar el examen.
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.
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.
C2 noun /ˈfɔːrʃɔːr/

foreshore

orilla
Meaning
The part of the shore between the high and low tide marks
Example
Children were playing on the foreshore, collecting shells.
Los niños estaban jugando en la orilla, recogiendo conchas.
B1 adjective /faɪˈnænʃəl/

financial

financiero
Meaning
relating to money, banking, or finance
Example
He made a sound financial decision by investing wisely.
Tomó una decisión financiera sólida al invertir sabiamente.
C1 noun /ˈfɔːrsəm/

foursome

cuatro personas o cosas
Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
El cuarteto disfrutó de un juego de golf juntos.
C1 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.
A1 adjective /frɛntʃ/

french

francés
Meaning
Relating to France, its people, or their language.
Example
We enjoyed delicious French cuisine on our trip to Paris.
Disfrutamos de deliciosa comida francesa en nuestro viaje a París.
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.
A1 adjective /fʊl/

full

lleno
Meaning
Containing as much or as many as possible; complete.
Example
The glass is full of water.
El vaso está lleno de agua.
A2 adjective /ˈfroʊzən/

frozen

congelado
Meaning
preserved by being made extremely cold; turned into ice
Example
The lake was completely frozen during winter.
El lago estaba completamente congelado durante el invierno.
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.
A2 noun /ˈfɑː.mɪŋ/

farming

agricultura
Meaning
the activity or business of growing crops and raising animals for food or other products
Example
Farming requires both hard work and knowledge about the land.
La agricultura requiere tanto trabajo duro como conocimiento sobre la tierra.
C1 noun /fəˌsɪlɪˈteɪʃən/

facilitation

facilitación
Meaning
The action of facilitating or making an action or process easier or helping bring about an outcome.
Example
Her facilitation made the meeting run smoothly.
Su facilitación hizo que la reunión fuera fluida.
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.
C2 noun /floʊ/

floe

iceberg flotante
Meaning
a large sheet of floating ice
Example
The polar bears rested on the ice floe.
Los osos polares descansaron sobre el iceberg flotante.
B2 noun /ˈfriːdəm ˌfaɪtər/

freedom fighter

luchador por la libertad
Meaning
a person who takes part in an armed or political struggle to achieve freedom or independence for their people or country
Example
The freedom fighter dedicated his life to the liberation of his homeland.
El luchador por la libertad dedicó su vida a la liberación de su patria.
B1 noun /ˈfeɪvər/

favor

favor
Meaning
An act of kindness or approval.
Example
She asked him for a small favor.
Ella le pidió un pequeño favor.
C1 noun /fɔːn/

Fawn

cervatillo
Meaning
a young deer; a light yellowish-brown color
Example
The mother deer protects her fawn from predators.
La cierva protege a su cervatillo de los depredadores.
B2 verb /fʊlˈfɪl/

fulfill

cumplir
Meaning
to complete or accomplish something, especially a task or promise
Example
He worked hard to fulfill his dreams.
Trabajó duro para cumplir sus sueños.
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.
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.
B2 adjective /fɔːrˈsiːəbl/

foreseeable

previsible
Meaning
Able to be predicted or expected in advance
Example
The company is unlikely to make changes in the foreseeable future.
Es poco probable que la empresa realice cambios en el futuro previsible.
A1 noun ˈfjuː.tʃər

future

futuro
Meaning
The time or a period of time following the moment of speaking or writing; time regarded as still to come.
Example
Future projects depend on strategic planning.
Los proyectos futuros dependen de la planificación estratégica.
B2 noun /ˈfʊtɪdʒ/

footage

grabación de video
Meaning
a recorded film or video, especially one that is used for news or documentaries
Example
The footage of the protest was shown on television all day.
El metraje de la protesta se mostró en la televisión todo el día.
C1 noun/verb /freɪ/

fray

pelea, desgastarse
Meaning
As a noun, a fight or heated dispute; as a verb, to unravel or wear out through friction.
Example
He tried to stay calm, but his nerves began to fray during the argument.
Trató de mantenerse calmado, pero sus nervios empezaron a desgastarse durante la discusión.
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 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.
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.
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.
C1 verb /feɪn/

feign

fingir, simular
Meaning
to pretend or fake; to give a false appearance of
Example
She feigned illness to avoid going to work.
Ella fingió estar enferma para evitar ir a trabajar.
B1 noun flæɡz

flags

bandera
Meaning
A piece of cloth or similar material, typically oblong or square, attachable by one edge to a pole or rope.
Example
The streets were decorated with national flags.
Las calles estaban decoradas con banderas nacionales.
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.
C2 verb /ˈfɒn.dəl/

fondle

acariciar
Meaning
To stroke or caress lovingly or gently.
Example
She fondled the kitten gently in her lap.
Ella acarició al gatito suavemente en su regazo.
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.
C2 verb /foʊˈmɛnt/

foment

fomentar
Meaning
To instigate or stir up (an undesirable or violent sentiment or course of action).
Example
The rebel leader tried to foment unrest among the people.
El líder rebelde trató de fomentar el descontento entre la gente.
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.
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.
C1 noun /foʊ/

foe

enemigo
Meaning
an enemy or opponent
Example
The knight fought bravely against his foe.
El caballero luchó valientemente contra su enemigo.
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 adjective /ˈfuːlˌhɑːrdi/

foolhardy

temerario
Meaning
Recklessly bold or rash; taking foolish risks.
Example
It was foolhardy of him to climb the mountain without proper gear.
Fue temerario de su parte escalar la montaña sin el equipo adecuado.
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.
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.
C1 verb /ˈfɜːrmɛnt/

ferment

someterse a un proceso químico donde los azúcares se convierten en alcohol o ácido; incitar o agitar el cambio
Meaning
to undergo a chemical process where sugars are converted to alcohol or acid; to incite or stir up change
Example
The grapes are left to ferment for several weeks.
Las uvas se dejan fermentar durante varias semanas.
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.
A2 adjective /ˈfraɪtənd/

frightened

asustado
Meaning
feeling fear or anxiety; scared
Example
The child was frightened by the loud noise.
El niño estaba asustado por el ruido fuerte.
C1 noun /fjuːd/

feud

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

furtive

furtivo
Meaning
Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble.
Example
He cast a furtive glance at the door before leaving.
Él echó una mirada furtiva a la puerta antes de salir.
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.
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.
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.
C2 adjective /ˈfjuːzəbl/

fusible

fundible
Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
El ingeniero usó una aleación fundible en el experimento.
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.
C1 adjective /ˈflæʃi/

flashy

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

fascinate

fascinar
Meaning
to attract and hold the attention of someone; to charm or captivate
Example
The magician's performance fascinated the audience.
La actuación del mago fascinó al público.
C2 adjective /ˈfɛkləs/

feckless

inepto, irresponsable
Meaning
lacking initiative or strength of character; irresponsible
Example
His feckless attitude at work caused several missed deadlines.
Su actitud inepta en el trabajo causó varios plazos perdidos.
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.
A2 noun /fækt/

fact

hecho
Meaning
A thing that is known or proved to be true
Example
It is a fact that the Earth orbits the Sun.
Es un hecho que la Tierra orbita alrededor del Sol.
B2 noun /fɔːrt/

Fort

fuerte
Meaning
a strong building or group of buildings where soldiers live and defend
Example
The ancient fort stood on top of the hill for centuries.
El antiguo fuerte se erguía en la cima de la colina durante siglos.
B1 adjective /ˈfrʌstreɪtɪŋ/

frustrating

frustrante
Meaning
causing annoyance or dissatisfaction
Example
The slow internet connection was really frustrating.
La conexión de internet lenta fue realmente frustrante.
C1 noun /ˈfɔːreɪ/

foray

incursión / primer intento
Meaning
A sudden short attack or attempt, especially into new activity or territory.
Example
The company made its first foray into the international market.
La empresa hizo su primera incursión en el mercado internacional.
C1 adjective /ˈfræɡməntɪd/

fragmented

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

fringe

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

fifty

cincuenta
Meaning
the number 50
Example
The stadium can hold fifty thousand people.
El estadio puede albergar cincuenta mil personas.
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.
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.
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 /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

preconocimiento
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
El profeta afirmó tener preconocimiento del evento.