slither
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C1 verb /ˈslɪðər/

slither

deslizarse
Meaning
to move smoothly over a surface with a twisting, sliding motion, like a snake
Example
The snake slithered through the grass.
La serpiente se deslizó a través de la hierba.
C1 verb /tʃɑːr/

char

quemar
Meaning
To burn or scorch something so that it becomes blackened.
Example
The cook accidentally charred the steak.
El cocinero accidentalmente quemó el filete.
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.
C1 noun /ˈweɪ.stɪdʒ/

Wastage

desperdicio
Meaning
the action of using or expending something carelessly or without purpose
Example
The company reduced food wastage by implementing better inventory management.
La empresa redujo el desperdicio de alimentos implementando una mejor gestión de inventario.
C1 noun flɛər

flair

habilidad natural
Meaning
A natural ability to do something well.
Example
She has a flair for design, always creating visually stunning work.
Ella tiene una habilidad especial para el diseño, siempre creando trabajos visualmente impresionantes.
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.
C1 verb /kəˈluːd/

collude

conspirar
Meaning
To secretly cooperate or conspire with others, often for a deceitful purpose.
Example
The two companies colluded to fix prices in the market.
Las dos empresas conspiraron para fijar los precios en el mercado.
C1 noun /æbˈstrækʃən/

abstraction

abstracción
Meaning
the process of forming general ideas by removing specific details; an abstract concept or idea
Example
Abstraction allows complex ideas to be represented in a simplified form.
La abstracción permite representar ideas complejas de forma simplificada.
C1 verb /ˈstaɪmi/

stymie

obstruir
Meaning
to prevent or hinder the progress of something
Example
The new regulations could stymie small businesses.
Las nuevas regulaciones podrían obstaculizar a las pequeñas empresas.
C1 noun kɒɡˈnɪʃ.ən

cognition

cognición
Meaning
The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.
Example
Cognition plays a key role in learning.
La cognición juega un papel clave en el aprendizaje.
C1 noun /əˈfen.dər/

Offender

delincuente; infractor de la ley
Meaning
a person who commits an illegal act; someone who breaks the law
Example
The young offender was sentenced to community service.
El joven delincuente fue sentenciado a servicio comunitario.
C1 noun /stɛntʃ/

stench

hedor
Meaning
A very strong and unpleasant smell.
Example
The stench of garbage filled the alley.
El hedor de la basura llenó el callejón.
C1 noun/verb /ˈɡlɪmər/

glimmer

un resplandor débil
Meaning
A faint or wavering light; to shine with a faint light.
Example
A glimmer of hope shone in her eyes.
Un resplandor de esperanza brilló en sus ojos.
C1 noun /ˈtʃaɪ.nə.weər/

China-ware

porcelana
Meaning
dishes, plates, cups, and other tableware made of porcelain or fine ceramic
Example
The expensive china-ware was displayed in the cabinet.
Los costosos platos de porcelana fueron exhibidos en el gabinete.
C1 noun ˌdɛɡrəˈdeɪʃən

degradation

degradación
Meaning
The condition or process of degrading or being degraded.
Example
Soil degradation due to overuse is a growing issue.
La degradación del suelo debido al uso excesivo es un problema creciente.
C1 adjective skiˈmæt.ɪk

Schematic

relacionado con un esquema o de forma resumida
Meaning
Presenting some framework or concept briefly
Example
The engineer provided a schematic diagram of the project.
El ingeniero proporcionó un diagrama esquemático del proyecto.
C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

ideológico
Meaning
Relating to or based on a system of ideas or beliefs.
Example
The two parties are divided by deep ideological differences.
Las dos partes están divididas por profundas diferencias ideológicas.
C1 verb /ʌpˈruːt/

uproot

desarraigar
Meaning
To pull something out of the ground; to remove or displace completely.
Example
They uprooted the old tree from the garden.
Ellos desenterraron el viejo árbol del jardín.
C1 noun /ˈsaɪkiː/

psyche

alma / mente
Meaning
the human soul, mind, or spirit
Example
The novel explores the depths of the human psyche.
La novela explora las profundidades de la psique humana.
C1 adjective /rɪˈstreɪnd/

restrained

restricto
Meaning
characterized by reserve or self-control; held back
Example
Her restrained reaction surprised everyone.
Su reacción restringida sorprendió a todos.
C1 verb /ˈræŋɡl̩/

wrangle

discutir
Meaning
to argue or dispute noisily or angrily
Example
The two neighbors wrangled over the property line for hours.
Los dos vecinos discutieron durante horas sobre la línea de propiedad.
C1 noun /ˈtrɪb.jə.ter.i/

Tributary

afluente
Meaning
a river or stream flowing into a larger river or lake
Example
The tributary joins the main river near the city.
El afluente se une al río principal cerca de la ciudad.
C1 adjective /aɪˈdɪlɪk/

idyllic

idílico y hermoso
Meaning
Like an idyll; extremely happy, peaceful, or picturesque.
Example
They enjoyed an idyllic vacation by the sea.
Disfrutaron de unas vacaciones idílicas junto al mar.
C1 adjective /ˈsʌmp.tʃu.əs/

sumptuous

suntuoso
Meaning
Splendid and expensive-looking; luxurious.
Example
The guests were treated to a sumptuous banquet.
Los invitados fueron tratados con un banquete suntuoso.
C1 verb /tɔːnt/

taunt

provocar
Meaning
to provoke or challenge someone with insulting remarks
Example
The bully tried to taunt him with cruel words.
El matón intentó provocarlo con palabras crueles.
C1 noun /sɪˈkriː.ʃən/

Secretion

secreción
Meaning
a process by which substances are produced and discharged from a cell or gland
Example
Insulin secretion is crucial for blood sugar regulation.
La secreción de insulina es crucial para la regulación del azúcar en sangre.
C1 adjective /ˈfrɛn.zid/

frenzied

frenético
Meaning
Wildly excited or uncontrolled
Example
The frenzied crowd cheered as the band took the stage.
La multitud frenética vitoreó cuando la banda subió al escenario.
C1 adjective /ˌeɪˈmɔːrəl/

amoral

amoral
Meaning
Lacking a moral sense; unconcerned with rightness or wrongness of something.
Example
The character in the novel was portrayed as completely amoral.
El personaje en la novela fue retratado como completamente amoral.
C1 noun /bɪz/

Biz

negocios
Meaning
business (informal); commercial enterprise or activity
Example
He's been in the restaurant biz for twenty years.
Ha estado en el negocio de los restaurantes durante veinte años.
C1 adjective /əˌpɒk.əˈlɪp.tɪk/

apocalyptic

apocalíptico
Meaning
Describing the end of the world, or something catastrophic and disastrous.
Example
The movie depicts an apocalyptic future after a nuclear war.
La película describe un futuro apocalíptico después de una guerra nuclear.
C1 noun /ˈdɛmənˌstreɪtər/

demonstrator

demostrador, manifestante
Meaning
a person who shows how something works or takes part in a public protest
Example
The demonstrators marched peacefully through the city streets.
Los manifestantes marcharon pacíficamente por las calles de la ciudad.
C1 adjective /ˈhæɡ.ərd/

Haggard

parecer exhausto y enfermo, especialmente por fatiga, preocupación o sufrimiento
Meaning
looking exhausted and unwell, especially from fatigue, worry, or suffering
Example
After working three nights without sleep, he looked haggard.
Después de trabajar tres noches sin dormir, se veía agotado.
C1 adjective /ˌjuːnɪˈsɛljʊlər/

unicellular

unicelular
Meaning
Consisting of a single cell.
Example
Amoebas are unicellular organisms.
Las amibas son organismos unicelulares.
C1 adverb /ˌðeərəˈpɒn/

Thereupon

inmediatamente después;
Meaning
immediately after that; following that event
Example
He finished his speech and thereupon left the stage.
Terminó su discurso y, inmediatamente después, dejó el escenario.
C1 verb /ɪmˈpɑːrt/

impart

impartir
Meaning
to make information known; to bestow or communicate
Example
The teacher imparted valuable knowledge to her students.
La maestra impartió valioso conocimiento a sus estudiantes.
C1 noun /məˈrɑːl/

Morale

moral; estado de ánimo
Meaning
the confidence, enthusiasm, and discipline of a person or group
Example
The team's morale improved after the victory.
La moral del equipo mejoró después de la victoria.
C1 verb /dɪˈɡreɪd/

degrade

degradar
Meaning
To lower in dignity, quality, or value; to treat with disrespect or to deteriorate.
Example
Harsh words can degrade a person's confidence.
Las palabras duras pueden degradar la confianza de una persona.
C1 noun /ˈjeloʊ oʊliˈændər/

Yellow oleander

oleandro amarillo
Meaning
a tropical flowering shrub with bright yellow flowers; also known as lucky nut
Example
The yellow oleander blooms throughout the year in warm climates.
El oleandro amarillo florece durante todo el año en climas cálidos.
C1 adjective /ˌmɪsəˈleɪniəs/

Miscellaneous

misceláneo; diverso; mezclado
Meaning
various; diverse; mixed; assorted
Example
The box contained miscellaneous items from different periods.
La caja contenía artículos diversos de diferentes períodos.
C1 adjective /hjuːˈmeɪn/

humane

humano
Meaning
Showing compassion or benevolence.
Example
The doctor provided humane treatment to the injured animals.
El médico proporcionó tratamiento humano a los animales heridos.
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.
C1 noun /ˈpɜːrkəleɪtər/

percolator

percolador de café
Meaning
A device used for brewing coffee by continually cycling boiling water through coffee grounds.
Example
She made a fresh pot of coffee using the percolator.
Hizo una taza fresca de café utilizando el percolador.
C1 verb /ˈplʌm.ɪt/

plummet

caer verticalmente a alta velocidad
Meaning
to fall straight down at high speed
Example
Stock prices plummeted after the sudden market crash.
Los precios de las acciones cayeron repentinamente después del colapso del mercado.
C1 verb /ˌʌndərˈvæljuː/

undervalue

devaluar
Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
Ella sintió que su jefe constantemente no valoraba sus contribuciones.
C1 phrase ˌkæt.əˈɡɒr.ɪ.kəl.i rɪˈfjuː.tɪd

categorically refuted

totalmente refutado
Meaning
Completely and absolutely denied or disproved.
Example
The claims were categorically refuted by officials.
Las afirmaciones fueron categóricamente refutadas por los funcionarios.
C1 noun /kənˈstɪtʃuənsi/

constituency

circunscripción
Meaning
A geographical area whose residents elect a representative to a legislative body.
Example
She campaigned tirelessly across her constituency.
Hizo campaña incansablemente por su circunscripción.
C1 adjective /rɪˈzɪstɪv/

resistive

resistivo
Meaning
tending to resist or oppose; in physics, relating to electrical resistance
Example
The material has resistive properties that slow down current flow.
El material tiene propiedades resistivas que desaceleran el flujo de corriente.
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.
C1 adjective /pəˈtɜːrnəl/

paternal

paternal
Meaning
Relating to or characteristic of a father.
Example
He took a paternal interest in the boy’s education.
Él mostró un interés paternal en la educación del niño.
C1 adjective /ˈstɔːlwərt/

stalwart

firme, leal
Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
Ella siempre ha sido una firme defensora de la comunidad.
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.
C1 verb /aʊtˈlɪv/

outlive

sobrevivir
Meaning
to live longer than someone or something else
Example
She outlived all her siblings.
Ella vivió más tiempo que todos sus hermanos.
C1 adjective ˌkɑːr.sɪ.nəˈdʒen.ɪk

carcinogenic

carcinógeno
Meaning
Having the potential to cause cancer in living tissue.
Example
Processed meat contains carcinogenic compounds.
La carne procesada contiene compuestos carcinógenos.
C1 noun /kiː/

quay

muelle
Meaning
A platform lying alongside or projecting into water for loading and unloading ships.
Example
The cargo was unloaded at the quay.
La carga fue descargada en el muelle.
C1 noun ˌæprɪˈhɛnʃən

apprehension

preocupación
Meaning
Anxiety or fear that something bad or unpleasant will happen.
Example
There is an apprehension about the depletion of fish stocks.
Hay preocupación por la disminución de las existencias de pescado.
C1 adjective /ɡlaɪˈsiː.mɪk/

glycemic

relacionado con la glucosa
Meaning
Relating to the presence of glucose in the blood and how foods affect blood sugar levels.
Example
High-glycemic foods cause a rapid increase in blood sugar.
Los alimentos con alto índice glucémico causan un aumento rápido del azúcar en la sangre.
C1 noun /kəmˈpəʊ.ʒər/

composure

estado de calma y autocontrol
Meaning
The state or feeling of being calm and in control of oneself.
Example
She maintained her composure during the interview.
Ella mantuvo su compostura durante la entrevista.
C1 verb /snɪp/

snip

cortar
Meaning
to cut something quickly with scissors or a sharp tool
Example
She snipped the loose thread from her dress.
Ella cortó el hilo suelto de su vestido.
C1 noun /krɪˈden.ʃəl/

credential

credencial
Meaning
a qualification, achievement, or aspect of a person's background used to indicate suitability for something
Example
She presented her credentials before starting the new job.
Ella presentó sus credenciales antes de comenzar el nuevo trabajo.
C1 adjective /ʌnˈvaɪəbl/

unviable

inválido
Meaning
Not capable of working successfully; not feasible or practical.
Example
The project was deemed unviable due to high costs.
El proyecto fue considerado inviable debido a los altos costos.
C1 noun /ˌprɑːfɪˈtɪr/

profiteer

especulador
Meaning
a person who makes excessive profits, especially unfairly or illegally
Example
The government punished war profiteers.
El gobierno castigó a los especuladores de la guerra.
C1 noun /ˈkæzəm/

chasm

grieta / gran diferencia
Meaning
a deep fissure in the earth's surface or a wide difference between people or ideas
Example
There was a great chasm between the two political parties.
Había una gran grieta entre los dos partidos políticos.
C1 adjective /daɪˈvɜːrsɪfaɪd/

diversified

diversificado
Meaning
Made or having variety in form, nature, or content.
Example
The company adopted a diversified business strategy to reduce risks.
La empresa adoptó una estrategia empresarial diversificada para reducir los riesgos.
C1 verb/noun /ˈrɛlɪʃ/

relish

disfrutar / condimento
Meaning
to greatly enjoy; also a condiment or sauce
Example
She relished the opportunity to travel abroad.
Ella disfrutó mucho de la oportunidad de viajar al extranjero.
C1 verb /ˈpoʊ.lə.raɪz/

polarize

polarizar
Meaning
to divide or cause to divide into two sharply contrasting groups or sets of opinions or beliefs
Example
The controversial decision polarized public opinion.
La decisión controvertida dividió la opinión pública en dos grupos opuestos.
C1 verb /ˈpɜːrpɔːrt/

purport

pretender
Meaning
to claim or profess something, often falsely
Example
The document purports to be an official government report.
El documento pretende ser un informe oficial del gobierno.
C1 adverb /ˈrɪdʒɪdli/

Rigidly

estrictamente; de manera inflexible
Meaning
in a strict, inflexible manner; without compromise
Example
The rules are rigidly enforced in this institution.
Las reglas son estrictamente aplicadas en esta institución.
C1 verb /ˌaʊtˈweɪ/

outweigh

ser más importante
Meaning
To be more important, valuable, or significant than something else.
Example
The benefits of the new policy outweigh the risks.
Los beneficios de la nueva política superan los riesgos.
C1 noun /ˈɡlædiˌeɪtər/

gladiator

gladiador
Meaning
A man trained to fight in public contests in ancient Rome.
Example
The gladiator fought bravely in the arena.
El gladiador luchó valientemente en la arena.
C1 noun /spæt/

spat

disputa pequeña
Meaning
a short, petty quarrel or argument
Example
They had a brief spat about who should do the dishes.
Tuvieron una breve disputa sobre quién debería lavar los platos.
C1 noun ɪnˈflɛk.ʃən

inflection

inflexión
Meaning
The change in pitch or tone of voice when speaking for emphasis.
Example
His inflection kept the audience engaged.
Su inflexión mantuvo al público comprometido.
C1 noun /ˈʌp.rɔːr/

Uproar

alboroto; ruido; disturbio
Meaning
a loud and emotional noise or disturbance; public outcry
Example
The announcement caused an uproar among the students.
El anuncio causó un alboroto entre los estudiantes.
C1 noun /pɪˌdɛs.tri.ə.naɪˈzeɪ.ʃən/

pedestrianization

peatonalización
Meaning
Making areas pedestrian-friendly, closing any area to vehicle traffic and making it open only for pedestrians.
Example
The pedestrianization of city centers reduces pollution.
La peatonalización de los centros urbanos reduce la contaminación.
C1 adjective /ˈpɛtjʊlənt/

petulant

irritable
Meaning
Childishly sulky or bad-tempered.
Example
The child became petulant when denied more candy.
El niño se volvió irritable cuando no le dieron más dulces.
C1 noun /ˈdɛməɡɒɡ/

demagogue

líder demagógico
Meaning
A political leader who seeks support by appealing to popular desires and prejudices rather than by using rational argument.
Example
The crowd was swayed by the fiery speeches of the demagogue.
La multitud fue influenciada por los discursos apasionados del líder demagógico.
C1 noun /ˌhaɪ.roʊˈɡlɪf.ɪks/

hieroglyphics

jeroglíficos
Meaning
a system of writing using pictures or symbols, used especially by ancient Egyptians
Example
The tomb walls were covered with Egyptian hieroglyphics.
Las paredes de la tumba estaban cubiertas con jeroglíficos egipcios.
C1 adjective /əˈrɛstɪŋ/

arresting

atractivo
Meaning
Attracting attention in a striking or impressive way.
Example
The actress gave an arresting performance.
La actriz dio una actuación atractiva.
C1 adjective /maɪˈkroʊ.bi.əl/

microbial

microbiano
Meaning
Related to bacteria, fungi, and other microscopic organisms.
Example
Microbial activity in the soil improves fertility.
La actividad microbiana en el suelo mejora la fertilidad.
C1 noun /kɔːr/

corps

rama del ejército, grupo
Meaning
a branch of the military or a group organized for a specific purpose
Example
He joined the army corps after graduation.
Se unió al cuerpo del ejército después de graduarse.
C1 noun, adjective /ˈsɛntənəri/ or /sɛnˈtɛnəri/

centenary

centenario
Meaning
The hundredth anniversary of a significant event; relating to a period of 100 years.
Example
The school celebrated its centenary with a grand event.
La escuela celebró su centenario con un gran evento.
C1 adjective /ˈwɪntri/

wintry

invernal
Meaning
Characteristic of or suitable for winter; cold and bleak.
Example
The wintry wind made everyone shiver as they walked outside.
El viento invernal hizo que todos temblaran mientras caminaban afuera.
C1 verb /mɔːl/

maul

mutilar
Meaning
To wound or injure someone by scratching or tearing; to handle roughly.
Example
The bear mauled the camper in the forest.
El oso mutiló al campista en el bosque.
C1 noun /ˈtændʒənt/

tangent

tangente
Meaning
a straight line or plane that touches a curve or curved surface at a point but does not cross it
Example
The teacher drew a tangent to the circle on the board.
El profesor dibujó una tangente al círculo en la pizarra.
C1 noun /ɪnˈsek.tɪ.saɪd/

Insecticide

insecticida
Meaning
a substance used for killing insects; a chemical pesticide that targets insects
Example
The farmer sprayed insecticide on his crops to protect them from harmful bugs.
El agricultor roció insecticida en sus cultivos para protegerlos de los insectos dañinos.
C1 noun /ˌpærəˈnɔɪə/

paranoia

miedo irracional y persistente de que las personas están 'tratando de hacerle daño' o lo están observando constantemente
Meaning
an irrational and persistent feeling that people are 'out to get you' or are constantly watching you
Example
His constant paranoia made it hard for him to trust anyone.
Su paranoia constante hacía que fuera difícil confiar en cualquiera.
C1 noun, verb /pliːt/

pleat

pliegue
Meaning
a fold in fabric made by doubling the material back upon itself
Example
She added a pleat to the skirt for extra volume.
Ella agregó un pliegue a la falda para más volumen.
C1 adjective /dɪˈʃɛvəld/

disheveled

desordenado
Meaning
Untidy, messy, or in disorder, especially of hair or clothing.
Example
He arrived with disheveled hair and wrinkled clothes.
Él llegó con el cabello desordenado y la ropa arrugada.
C1 noun /ˈpɛnɪtəns/

penitence

penitencia
Meaning
The action or feeling of showing sorrow and regret for having done wrong.
Example
His eyes were full of penitence after realizing his mistake.
Sus ojos estaban llenos de penitencia después de darse cuenta de su error.
C1 verb /ˌoʊvərˈθroʊ/

overthrow

felicidad
Meaning
To remove a leader or government from power, often by force.
Example
The rebels planned to overthrow the corrupt regime.
No pudo esconder su felicidad cuando recibió el premio.
C1 noun /səˈvænə/

savanna

sabana (con árboles dispersos)
Meaning
a grassy plain with scattered trees, typical of tropical and subtropical regions
Example
Giraffes browsed on acacia trees across the wide savanna.
Las jirafas pastaban en los árboles de acacia a través de la amplia sabana.
C1 verb /ˌriːəˈfɜːrm/

reaffirm

reafirmar
Meaning
To state again strongly; to confirm or strengthen a statement or belief.
Example
The president reaffirmed his commitment to education reform.
El presidente reafirmó su compromiso con la reforma educativa.
C1 adjective /əbˈzɜːrvənt/

Observant

observador
Meaning
quick to notice things; watchful; attentive
Example
The observant detective noticed every small detail at the crime scene.
El detective observador notó cada pequeño detalle en la escena del crimen.
C1 noun, verb /raʊt/

rout

derrota
Meaning
A decisive defeat; to defeat completely.
Example
The army routed the enemy forces in the battle.
El ejército derrotó completamente a las fuerzas enemigas en la batalla.
C1 noun/verb /kwɪp/

quip

comentario ingenioso
Meaning
A witty remark; to make a witty or clever comment.
Example
She quipped about the weather during the meeting.
Ella hizo un comentario ingenioso sobre el clima durante la reunión.
C1 adjective /ʌnˈkæni/

uncanny

extraño
Meaning
Strange or mysterious, especially in an unsettling way.
Example
She has an uncanny ability to predict the future.
Ella tiene una extraña habilidad para predecir el futuro.
C1 verb /ˈeɪ.li.ə.neɪt/

alienate

alienar
Meaning
To make someone feel isolated or estranged; to cause someone to become unfriendly.
Example
His rude behavior alienated many of his friends.
Su comportamiento grosero alienó a muchos de sus amigos.
C1 noun /ˈkɜːrlər/

curler

rizador
Meaning
A small roller used for curling hair.
Example
She used a curler to style her hair for the party.
Ella usó un rizador para estilizar su cabello para la fiesta.
C1 adjective ˈeɪlɪəneɪtɪd

alienated

alienado
Meaning
Feeling isolated or estranged; disconnected from others or society.
Example
Alienated students are more prone to delinquency.
Los estudiantes alienados son más propensos a la delincuencia.
C1 noun /ˈtɜːrbjələns/

turbulence

turbulencia
Meaning
Violent or unsteady movement of air, water, or some other fluid; disorder or conflict.
Example
The plane experienced severe turbulence during the flight.
El avión experimentó una turbulencia severa durante el vuelo.
C1 noun /vəˈlɒs.ɪ.ti/

velocity

velocidad
Meaning
Speed or acceleration, the rate of movement of any object or vehicle.
Example
High velocity trains reduce travel time significantly.
Los trenes de alta velocidad reducen significativamente el tiempo de viaje.
C1 verb /ˈnjuːtrəlaɪz/

neutralize

neutralizar
Meaning
to make something ineffective or harmless
Example
The medicine helped neutralize the poison in his system.
La medicina ayudó a neutralizar el veneno en su sistema.
C1 adjective /ˈsʌpl/

supple

flexible
Meaning
Easily bending or moving without breaking; flexible and adaptable.
Example
The gymnast’s body was remarkably supple.
El cuerpo de la gimnasta era notablemente flexible.
C1 adjective /ˈkoʊvərt/

covert

secreto
Meaning
hidden, secret, or not openly acknowledged
Example
The spy conducted a covert operation behind enemy lines.
El espía llevó a cabo una operación encubierta detrás de las líneas enemigas.
C1 noun /ˈstoʊəˌweɪ/

stowaway

polizón
Meaning
A person who hides on a ship, plane, or other vehicle in order to travel secretly without paying.
Example
The crew discovered a stowaway hiding in the cargo hold.
La tripulación descubrió un polizón escondido en el compartimento de carga.
C1 adjective /ˈpɪər.ləs/

Peerless

incomparable; sin igual; sin rival
Meaning
unequaled; having no match or equal; without rival
Example
Her peerless beauty captivated everyone.
Su belleza incomparable cautivó a todos.
C1 adjective /ˈhiːdləs/

heedless

despreocupado
Meaning
showing a reckless lack of care or attention
Example
He drove with heedless disregard for the rules.
Condujo con desprecio por las reglas.
C1 verb /sɪˈdjuːs/

seduce

seducir
Meaning
to attract someone into doing something, especially something they might not normally do
Example
The advertisement was designed to seduce customers into buying luxury products.
El anuncio estaba diseñado para seducir a los clientes a comprar productos de lujo.
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

inadecuado
Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
Su comportamiento grosero era inadecuado para un líder.
C1 verb /raʊz/

rouse

despertar
Meaning
To awaken from sleep or to stir into action.
Example
The loud alarm roused him from his deep sleep.
La alarma ruidosa lo despertó de su sueño profundo.
C1 noun ˌhaɪ.drəˈlɒdʒ.ɪ.kəl ˈsaɪ.kəl

hydrological cycle

ciclo hidrológico
Meaning
The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land.
Example
The hydrological cycle ensures continuous water movement in nature.
El ciclo hidrológico asegura el movimiento continuo del agua en la naturaleza.
C1 verb /ˈprɒpəɡeɪt/

propagate

propagar
Meaning
To spread or transmit an idea, belief, or information widely; also to reproduce in plants or animals.
Example
Scientists work to propagate the species in captivity.
Los científicos trabajan para propagar las especies en cautiverio.
C1 adjective /rɪˈpʌl.sɪv/

Repulsive

repulsivo; desagradable; que causa aversión
Meaning
extremely unpleasant; causing strong dislike or disgust
Example
The smell of rotten eggs was absolutely repulsive.
El olor a huevos podridos era absolutamente repulsivo.
C1 noun /kənˈsep.ʃən/

Conception

concepción; idea; fertilización
Meaning
the forming of an idea or plan; the fertilization of an ovum by a sperm; the action of conceiving
Example
The conception of this innovative project took several months of brainstorming.
La concepción de este proyecto innovador tomó varios meses de lluvia de ideas.
C1 noun /əˈkɔːrdiən/

accordion

acordión (instrumento musical)
Meaning
a musical instrument played by squeezing and expanding with keys and buttons
Example
The musician played a cheerful tune on the accordion.
El músico tocó una melodía alegre en el acordeón.
C1 verb /ɡreɪt/

grate

rallar, irritar
Meaning
to shred food into small pieces using a grater; to irritate or annoy
Example
She grated the cheese for the pasta dish.
Ella ralló el queso para el plato de pasta.
C1 noun /kæsˈkeɪd/

Cascade

cascada; una sucesión de etapas o operaciones
Meaning
a waterfall; a succession of stages or operations
Example
The mountain cascade created a beautiful natural swimming pool below.
La cascada de la montaña creó una hermosa piscina natural de natación abajo.
C1 noun ˌskeɪ.ləˈbɪl.ə.ti

scalability

escalabilidad
Meaning
The capacity to be changed in size or scale; the ability of a system to handle a growing amount of work.
Example
The new software offers high scalability for large enterprises.
El nuevo software ofrece alta escalabilidad para grandes empresas.
C1 adjective /ʌnˈfɛtərd/

unfettered

libre
Meaning
not restricted or confined; free
Example
The artist enjoyed unfettered freedom of expression.
El artista disfrutó de la libertad ilimitada de expresión.
C1 noun /plæsˈtɪsəti/

plasticity

plasticidad, capacidad de adaptarse
Meaning
the quality of being easily shaped or molded; adaptability
Example
The brain's plasticity allows it to adapt after injury.
La plasticidad del cerebro le permite adaptarse después de una lesión.
C1 noun /ˌɪnsɪɡˈnɪfɪkəns/

insignificance

insignificancia
Meaning
The quality of being unimportant or trivial.
Example
He felt a sense of insignificance in the vast universe.
Él sintió un sentido de insignificancia en el vasto universo.
C1 noun /ˈpriːˌæmbəl/

preamble

preámbulo
Meaning
a preliminary statement, especially the introduction to a formal document
Example
The preamble of the constitution outlines its guiding principles.
El preámbulo de la constitución describe sus principios fundamentales.