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A2 noun /ˈbɪljən/

billion

mil millones
Meaning
the number 1,000,000,000 (one thousand million)
Example
The company is worth more than a billion dollars.
La empresa vale más de mil millones de dólares.
C1 noun /rəʊˈbɒt.ɪk ˈsɜː.dʒər.i/

robotic surgery

cirugía robótica
Meaning
Surgery performed with the assistance of robotic systems to enhance precision and reduce invasiveness.
Example
Robotic surgery enhances precision in complex procedures.
La cirugía robótica mejora la precisión en procedimientos complejos.
B2 noun (plural) /ˈɑːrtɪˌfæks/

artifacts

artefactos
Meaning
objects made by humans, often of historical or cultural importance
Example
Archaeologists discovered valuable artifacts in the ruins.
Los arqueólogos descubrieron artefactos valiosos en las ruinas.
C1 noun /ˈlɛktən/

lectern

atril
Meaning
A tall stand with a sloping top used to support a book, notes, or script during a speech or lecture.
Example
The professor placed her notes on the lectern before starting her lecture.
La profesora colocó sus notas en el atril antes de comenzar su conferencia.
B2 adjective ˌrev.əˈluː.ʃən.ər.i

revolutionary

revolucionario
Meaning
Involving or causing a complete or dramatic change.
Example
Revolutionary ideas are reshaping the industry.
Las ideas revolucionarias están transformando la industria.
C1 noun /əˈkʌmplɪs/

accomplice

cómplice
Meaning
a person who helps another commit a crime
Example
The thief was arrested along with his accomplice.
El ladrón fue arrestado junto con su cómplice.
C2 noun /ˌhɛtərəʤəˈniːɪti/

heterogeneity

heterogeneidad
Meaning
the quality or state of being diverse in character or content
Example
The cultural heterogeneity of the city makes it vibrant and unique.
La heterogeneidad cultural de la ciudad la hace vibrante y única.
B2 noun /ˈliːf.lət/

Leaflet

folleto; volante
Meaning
a printed sheet of paper containing information or advertising and usually distributed free
Example
She handed out leaflets about the environmental campaign.
Ella repartió folletos sobre la campaña medioambiental.
C1 noun /tækˈtɪʃ.ən/

tactician

estratega
Meaning
a person who is skilled at planning and achieving goals, especially in military or business
Example
Napoleon was a brilliant tactician.
Napoleón era un brillante táctico.
C1 noun /ˈklɛmənsi/

clemency

clemencia
Meaning
mercy, leniency, or forgiveness shown towards someone
Example
The judge showed clemency and reduced his sentence.
El juez mostró clemencia y redujo su sentencia.
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.
A1 adverb /təˈdeɪ/

Today

hoy
Meaning
on this day; at the present time
Example
Today is a beautiful day for a walk.
Hoy es un hermoso día para caminar.
B1 verb /prəˈsiːd/

proceed

proceder
Meaning
to continue with a course of action; to move forward
Example
Let's proceed with the meeting as planned.
Procedamos con la reunión como estaba planeado.
C1 adjective /ˌsækrəˈlɪdʒəs/

sacrilegious

sacrílego
Meaning
Showing disrespect or irreverence toward something sacred.
Example
The painting was criticized as being sacrilegious.
La pintura fue criticada por ser sacrílega.
C2 verb /ˌoʊvərˈliːp/

overleap

saltar por encima
Meaning
To jump over something; to omit or disregard something.
Example
He managed to overleap the fence easily.
Él logró saltar la cerca fácilmente.
B2 verb, adjective /ɪˈlæbəreɪt/ (verb), /ɪˈlæbərət/ (adjective)

elaborate

elaborar / detallado y complicado en diseño
Meaning
verb: to explain something in detail; adjective: detailed and complicated in design
Example
She asked him to elaborate on his proposal.
Ella le pidió que elaborara su propuesta.
B2 noun /den/

Den

cueva; sala cómoda; lugar para actividades ilegales
Meaning
a wild animal's lair or home; a small, comfortable room; a place for illegal activities
Example
The fox disappeared into its den when it sensed danger approaching.
El zorro desapareció en su cueva cuando sintió que el peligro se acercaba.
B2 noun /ˈdɪpləmæt/

diplomat

diplomático
Meaning
An official representing a country abroad; a person skilled in dealing with people tactfully.
Example
The diplomat negotiated a peace agreement.
El diplomático negoció un acuerdo de paz.
C1 adverb /ˌðɛərˈɪn/

Therein

dentro de;
Meaning
in that place; in that respect
Example
The box contains many treasures, and therein lies its value.
La caja contiene muchos tesoros, y dentro de ella radica su valor.
C2 adjective /ˌsɛm.iˈsɪv.ə.laɪzd/

semicivilized

semi-civilizado
Meaning
Partially civilized; having some aspects of civilization but not fully developed.
Example
The tribe was described as semicivilized by early explorers.
La tribu fue descrita como semi-civilizada por los primeros exploradores.
C1 noun /ˈbærɪstər/

barrister

abogado
Meaning
A type of lawyer in certain legal systems who specializes in courtroom advocacy and litigation.
Example
The barrister argued the case passionately before the judge.
El abogado defendió el caso con pasión ante el juez.
C1 adjective /ˌɪndɪˈfɛnsəbl̩/

indefensible

indefendible
Meaning
not able to be protected or justified
Example
The minister’s remarks were considered indefensible by the public.
Los comentarios del ministro fueron considerados indefendibles por el público.
C2 verb /əˈbɑː.mə.neɪt/

abominate

abominar
Meaning
to feel hatred or loathing for something
Example
She abominates cruelty to animals.
Ella abomina la crueldad hacia los animales.
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.
C1 noun ˈpraʊ.es

prowess

destreza
Meaning
Skill or expertise in a particular activity or field.
Example
Prowess in sports enhances team strength.
La destreza en los deportes mejora la fuerza del equipo.
A1 noun, verb /hɛd/

head

cabeza / líder
Meaning
The upper part of the human body or to lead or be in charge of something.
Example
She turned her head to look out the window.
Ella giró su cabeza para mirar por la ventana.
B2 verb /ˈhɑːrnɪs/

harness

controlar y utilizar
Meaning
To control and make use of natural resources, especially energy.
Example
Scientists are working to harness solar power effectively.
Los científicos están trabajando para aprovechar la energía solar de manera eficaz.
B2 noun/verb /ræft/

raft

balsa
Meaning
A flat structure made of logs or planks tied together, used as a boat or floating platform; to travel or transport on such a structure.
Example
They built a raft to cross the river.
Ellos construyeron una balsa para cruzar el río.
C1 verb /ˈfɔːlsɪfaɪ/

falsify

falsificar
Meaning
to make something false or to misrepresent
Example
He tried to falsify the documents to avoid taxes.
Él trató de falsificar los documentos para evitar impuestos.
B2 noun, verb /stɛm/

stem

tallo / frenar
Meaning
Noun: The main stalk of a plant. Verb: To stop or restrict the flow or development of something.
Example
The gardener cut the stem of the rose; New policies aim to stem the flow of pollution.
El jardinero cortó el tallo de la rosa; Las nuevas políticas buscan frenar el flujo de contaminación.
C1 noun /ˈseɪ.tən/

Satan

Satanás
Meaning
the chief evil spirit; the Devil in Christian and Islamic belief
Example
According to religious texts, Satan tempts people to sin.
Según los textos religiosos, Satanás tienta a las personas a pecar.
A2 noun /ˈdaɪnɪŋ/

dining

cena
Meaning
the act of eating a meal, especially in a formal setting
Example
We enjoyed fine dining at the new restaurant.
Disfrutamos de una excelente cena en el nuevo restaurante.
A2 noun /ˈwɒʃ.ɪŋ məˌʃiːn/

Washing machine

lavadora
Meaning
a machine for washing clothes and other textiles
Example
The washing machine broke down and needs repair.
La lavadora se averió y necesita reparación.
C2 noun /səbˈmɜːrʒən/

submersion

inmersión
Meaning
the state of being under water
Example
The submersion of the fields lasted for several days after the heavy rain.
La inmersión de los campos duró varios días después de la lluvia fuerte.
C2 verb /dɪˈpreɪv/

deprave

depravar
Meaning
to corrupt morally; to make someone immoral or wicked
Example
The novel was criticized for attempting to deprave the minds of young readers.
La novela fue criticada por intentar depravando las mentes de los jóvenes lectores.
C1 verb /uːz/

ooze

filtrarse
Meaning
to slowly flow or leak out through small openings or pores
Example
Blood began to ooze from the small cut.
La sangre comenzó a filtrarse de la pequeña herida.
C1 noun /ˈdɪs.ə.nəns/

dissonance

disonancia
Meaning
Disagreement, lack of harmony, conflict between ideas or beliefs.
Example
The cultural dissonance created misunderstandings.
La disonancia cultural creó malentendidos.
C2 verb /rɛtʃ/

retch

felicidad
Meaning
to make the sound and movement of vomiting without bringing anything up
Example
The smell of spoiled food made him retch violently.
Ella no pudo ocultar su felicidad cuando recibió el premio.
C2 noun /ɪnˈsɪɡniə/

insignia

insignia
Meaning
A badge or symbol that shows rank, position, or membership.
Example
The soldier proudly wore the insignia of his regiment.
El soldado llevaba orgulloso la insignia de su regimiento.
C1 adjective /ˈdʒuː.bɪ.lənt/

jubilant

jubiloso
Meaning
feeling or expressing great happiness and joy
Example
The team was jubilant after winning the championship.
El equipo estaba jubiloso después de ganar el campeonato.
B1 verb /ˈkɒnsəntreɪt/

concentrate

concentrarse
Meaning
to focus all one's attention or mental effort on a particular object or activity
Example
She tried to concentrate on her studies despite the noise.
Ella intentó concentrarse en sus estudios a pesar del ruido.
C1 noun /ˈpoʊdiətrɪst/

podiatrist

podólogo
Meaning
a doctor specializing in foot care
Example
I have an appointment with the podiatrist for my ankle pain.
Tengo una cita con el podólogo para el dolor de tobillo.
C1 noun prɪˈdɪk.ə.mənt

predicament

aprieto
Meaning
A difficult, unpleasant, or embarrassing situation.
Example
Losing both jobs put him in a financial predicament.
Perder ambos trabajos lo puso en un aprieto financiero.
C2 verb /ɪˈfɛktʃueɪt/

effectuate

efectuar
Meaning
to put into force or cause to happen; to bring about
Example
The manager effectuated the changes to improve efficiency.
El gerente efectuó los cambios para mejorar la eficiencia.
B2 noun /ɪˈluː.ʒən/

Illusion

ilusión
Meaning
a thing that is or is likely to be wrongly perceived or interpreted; a false idea or belief
Example
The magician created a spectacular illusion that made the elephant appear to vanish.
El mago creó una espectacular ilusión que hizo que el elefante pareciera desvanecerse.
B2 adjective /ˈaɪ.dəl/

Idle

perezoso; inactivo; no trabajando
Meaning
lazy; inactive; not working or being used
Example
The factory workers were idle during the strike.
Los trabajadores de la fábrica estaban inactivos durante la huelga.
C1 noun/verb /kruːˈseɪd/

crusade

cruzada, campaña intensa
Meaning
a vigorous campaign for a social, political, or religious cause; to fight passionately for a cause
Example
She has been crusading for women's rights all her life.
ella ha estado cruzando por los derechos de las mujeres toda su vida.
C2 verb /dɪsˈmɛmbər/

dismember

desmembrar
Meaning
to cut or tear the limbs from a body; to divide into separate parts
Example
The king ordered his enemies to be dismembered.
El rey ordenó que sus enemigos fueran desmembrados.
C2 adjective /ˈdəʊ.lə.rəs/

dolorous

doloroso
Meaning
Expressing great sorrow or distress.
Example
He spoke in a dolorous tone after the loss.
Él habló en un tono doloroso después de la pérdida.
C1 verb /ˈmɑːrʃəl/

marshal

organizar
Meaning
To arrange or organize people, events, or resources in an orderly way.
Example
The teacher marshaled the students for the field trip.
La profesora organizó a los estudiantes para el viaje de campo.
C1 verb /ʃraʊd/

shroud

envolver
Meaning
to cover or hide; to wrap in cloth
Example
The mountain peak was shrouded in mist.
La cima de la montaña estaba envuelta en niebla.
C2 noun /ˌdɪfəˈrɛnʃə/

differentia

característica diferenciadora
Meaning
A distinguishing characteristic that sets one thing apart from another.
Example
The differentia of humans is their ability to reason abstractly.
La característica diferenciadora de los humanos es su capacidad para razonar de manera abstracta.
C2 noun /ˈwɔːrˌmʌŋɡər/

warmonger

guerrerista
Meaning
A person who advocates or promotes war or conflict.
Example
The leader was criticized as a warmonger by his opponents.
El líder fue criticado como un guerrerista por sus oponentes.
B1 noun ˈdɪsɪplɪn

discipline

disciplina
Meaning
The practice of training people to obey rules or a code of behavior, using punishment to correct disobedience
Example
Discipline helps maintain focus and productivity.
La disciplina ayuda a mantener el enfoque y la productividad.
B1 noun ɡreɪt wɔːl əv ˈtʃaɪ.nə

Great Wall of China

Gran Muralla China
Meaning
A massive ancient fortification system in China, built to protect against invasions and considered one of the most famous landmarks in the world.
Example
The Great Wall of China is one of the most famous landmarks in the world.
La Gran Muralla de China es uno de los monumentos más famosos del mundo.
B2 verb /dɪˈsiːv/

deceive

engañar
Meaning
To cause someone to believe something that is not true.
Example
He tried to deceive his friends with a fake story.
Intentó engañar a sus amigos con una historia falsa.
B2 noun /ˈɔɪ.stər/

Oyster

ostra
Meaning
a type of shellfish that can be eaten and sometimes contains pearls
Example
She ordered fresh oysters at the seafood restaurant.
Ella ordenó ostras frescas en el restaurante de mariscos.
C1 adjective /skænt/

Scant

escaso
Meaning
barely sufficient; inadequate; small in amount
Example
There was scant evidence to support his claim.
Había pocas pruebas para respaldar su afirmación.
A2 noun /ˈɪntəvjuː/

interview

entrevista
Meaning
A meeting of people face to face, especially for consultation.
Example
The interview was conducted in a calm and professional manner.
La entrevista se llevó a cabo de manera tranquila y profesional.
B2 adjective /ˈhændi/

handy

fácil de usar
Meaning
convenient to use or easily accessible; skillful with the hands
Example
This pocket knife is very handy when you go camping.
Este cuchillo de bolsillo es muy útil cuando vas de camping.
B1 noun ˈsɪs.təmz

systems

sistemas
Meaning
A set of connected things or parts forming a complex whole.
Example
Effective systems improve productivity.
Los sistemas efectivos mejoran la productividad.
A2 noun /ˈstreɪndʒər/

Stranger

extraño
Meaning
a person whom one does not know or with whom one is not familiar
Example
Never take candy from a stranger.
Nunca tomes dulces de un extraño.
C1 noun ˌsɛlf.rɪˈstreɪnt

self-restraint

autocontrol
Meaning
The practice of restraining oneself from indulging in something, typically an impulse or desire.
Example
Practicing self-restraint helps in avoiding impulsive decisions.
Practicar el autocontrol ayuda a evitar decisiones impulsivas.
C1 adjective ɪˈθɪə.ri.əl

ethereal

celestial, delicado, sobrenatural
Meaning
Extremely delicate and light in a way that seems too perfect for this world.
Example
Her voice had an ethereal quality.
Su voz tenía una calidad etérea.
C1 verb /dɪˈsɛkt/

dissect

disecar
Meaning
to cut apart an animal, plant, or other organism to study its internal parts; to analyze something in detail
Example
In biology class, students had to dissect a frog to learn about its anatomy.
En la clase de biología, los estudiantes tuvieron que diseccionar una rana para aprender sobre su anatomía.
C2 adjective /ˈfraʊzi/

frowsy

desordenado
Meaning
Scruffy and neglected in appearance; musty or stale in smell.
Example
He wore a frowsy old jacket that smelled of damp.
Él llevaba una chaqueta desordenada y vieja que olía a humedad.
B2 adverb /ˈprez.ənt.li/

Presently

actualmente; pronto; en un rato
Meaning
at the present time; soon; in a little while
Example
The doctor will see you presently.
El doctor te verá pronto.
B2 verb /ˈskræmbəl/

scramble

subir o mezclar rápidamente
Meaning
to move or climb quickly using hands and feet; to mix or arrange in a hurried way
Example
The kids scrambled up the hill to catch the kite.
Los niños subieron rápidamente la colina para atrapar la cometa.
B1 noun /ˈkɒkˌteɪl/

cocktail

cóctel
Meaning
a mixed drink typically containing alcohol and other ingredients.
Example
She ordered a cocktail at the bar.
Ella pidió un cóctel en el bar.
C2 noun ˈtræn.zi.əns

transience

transitoriedad
Meaning
The state or fact of lasting only for a short time; impermanence.
Example
The transience of youth makes it more precious.
La transitoriedad de la juventud la hace más preciosa.
C1 verb /rɪˈnɛɡ/

renege

romper un compromiso
Meaning
to go back on a promise, agreement, or commitment
Example
The company reneged on its promise to increase wages.
La empresa rompió su promesa de aumentar los salarios.
B2 verb /ˈælaɪ/

ally

aliado
Meaning
To unite or form a connection or partnership with another person, group, or nation.
Example
The two countries decided to ally against their common enemy.
Los dos países decidieron aliarse contra su enemigo común.
A2 noun /koʊt/

Coat

abrigo
Meaning
an outer garment worn over other clothes for warmth or protection
Example
He put on his winter coat before going outside.
Se puso su abrigo de invierno antes de salir.
C2 noun /ˈbroʊmiːn/

bromine

bromo
Meaning
a dark red, dense, toxic liquid element used in making dyes, flame retardants, and medications
Example
Bromine is commonly used in water treatment chemicals.
El bromo se utiliza comúnmente en productos químicos de tratamiento de agua.
A1 noun /faɪv/

five

cinco
Meaning
The number 5; one more than four and one less than six.
Example
She bought five apples from the market.
Ella compró cinco manzanas en el mercado.
C2 verb /dʒɪr/

jeer

burlarse
Meaning
to laugh at someone or something in a cruel or mocking way
Example
The crowd began to jeer at the opposing team.
La multitud comenzó a burlarse del equipo contrario.
C1 noun /rɪˌsɛptɪˈvɪti/

receptivity

receptividad
Meaning
The ability or willingness to receive something, especially signals or stimuli.
Example
Her receptivity to new ideas helped improve the project.
Su receptividad a nuevas ideas ayudó a mejorar el proyecto.
C1 noun /ˈhaɪ.drəʊˌpaʊər ˌdʒen.əˈreɪ.ʃən/

hydropower generation

generación hidroeléctrica
Meaning
The production of electrical power through the use of the gravitational force of falling or flowing water.
Example
Hydropower generation promotes green energy.
La generación hidroeléctrica promueve la energía verde.
C1 noun /ˌkɒnstəˈneɪʃən/

consternation

consternación
Meaning
A feeling of anxiety, dismay, or confusion, often caused by something unexpected.
Example
The sudden announcement caused widespread consternation among the employees.
El anuncio repentino causó una consternación generalizada entre los empleados
A2 noun /ˈbɪz.nəs/

Business

negocio; empresa; comercio
Meaning
work relating to the production, buying, and selling of goods or services
Example
He started his own business after graduating from university.
Él comenzó su propio negocio después de graduarse de la universidad.
C2 adjective /ˈsiːmi/

seamy

degradado, sórdido
Meaning
Morally degraded, unpleasant, or sordid.
Example
The novel reveals the seamy side of city life.
La novela revela el lado sórdido de la vida en la ciudad.
C2 adjective /ˈbɛlɪˌkoʊs/

bellicose

belicoso
Meaning
Showing a tendency to argue or fight; aggressive.
Example
His bellicose attitude often got him into unnecessary conflicts.
Su actitud belicosa a menudo lo metía en conflictos innecesarios.
C2 verb /ʌnˈfɛtər/

unfetter

desatar
Meaning
to release from restraint or restriction; to free
Example
The new law will unfetter small businesses from excessive regulations.
La nueva ley liberará a las pequeñas empresas de regulaciones excesivas.
C1 noun /slɪt/

Slit

rendija
Meaning
a long narrow opening or cut
Example
There was a small slit in the fabric.
Había una pequeña rendija en la tela.
B2 adjective /ɪmˈplɪsɪt/

implicit

implícito
Meaning
Suggested or understood without being directly stated.
Example
Her trust in him was implicit.
Su confianza en él era implícita.
C2 adjective /ˈnjuː.trɪ.tɪv/

nutritive

nutritivo
Meaning
Relating to nutrition; having nourishing qualities.
Example
The nutritive value of the fruit is very high.
El valor nutritivo de la fruta es muy alto.
B2 verb /kənˈsɒl.ɪ.deɪt/

consolidate

consolidar
Meaning
To combine things in order to make them more effective or easier to handle.
Example
The company aims to consolidate its market position.
La compañía tiene como objetivo consolidar su posición en el mercado.
A2 noun /stoʊn/

stone

piedra
Meaning
a hard, naturally occurring mineral material found in the earth
Example
He threw a stone into the lake.
Lanzó una piedra al lago.
C1 verb /ˈskwɒbəl/

squabble

discutir ruidosamente sobre algo sin importancia
Meaning
To argue noisily over something small or unimportant.
Example
The children squabbled over the last piece of cake.
Los niños discutían por el último trozo de pastel.
C2 adjective /həˈrɛtɪkəl/

heretical

herético
Meaning
Relating to or characterized by departure from accepted beliefs or standards, especially in religion.
Example
The priest condemned the book as heretical.
El sacerdote condenó el libro como herético.
B1 noun/verb /ˈdɒkjʊmənt/

document

documento
Meaning
Noun: A written, printed, or electronic record that provides information or evidence. Verb: To record information in written or electronic form.
Example
She carefully documented all the expenses of the trip.
Ella documentó cuidadosamente todos los gastos del viaje.
B2 noun /iˈkɒl.ə.dʒi/

ecology

ecología
Meaning
the study of how living things interact with each other and their environment
Example
Ecology helps us understand how pollution affects animals and plants.
La ecología nos ayuda a entender cómo la contaminación afecta a los animales y las plantas.
B2 adjective /ˈnɑː.lɪ.dʒə.bəl/

Knowledgeable

sabio; informado; educado
Meaning
having extensive knowledge; well-informed; educated
Example
She is very knowledgeable about ancient history.
Ella es muy sabia sobre la historia antigua.
B2 noun /ˈbriː.ðɪŋ tɛkˌniːks/

breathing techniques

técnicas de respiración
Meaning
Methods of controlling breathing to achieve relaxation and improve health.
Example
Breathing techniques help in reducing stress and anxiety.
Las técnicas de respiración ayudan a reducir el estrés y la ansiedad.
C1 noun /ˈpiːɒn/

peon

peón
Meaning
a low-ranking worker, often performing menial tasks
Example
The office peon delivered the files to each department.
El peón de la oficina entregó los archivos a cada departamento.
C2 adjective /ˈfraɪəbl/

friable

frágil
Meaning
Easily crumbled or reduced to powder.
Example
The old brick wall was friable and broke apart at a touch.
La pared vieja de ladrillos era frágil y se rompió con solo tocarla.
C2 verb /ˌsuːpərɪnˈtɛnd/

superintend

supervisar
Meaning
to oversee and direct the work or operation of something
Example
She was hired to superintend the construction project.
Ella fue contratada para supervisar el proyecto de construcción.
C1 adjective /ˌsɛlf əbˈzɔːrbd/

self-absorbed

egocéntrico
Meaning
Excessively preoccupied with oneself and one’s own thoughts, feelings, or interests.
Example
He was too self-absorbed to notice his friend's distress.
Estaba demasiado egocéntrico para notar la angustia de su amigo.
C2 noun, verb /ˈmaɪər/

mire

lodazal / enredo
Meaning
A stretch of swampy or boggy ground; as a verb, to entangle or involve someone in a difficult situation.
Example
The car was stuck in the mire after the heavy rain.
El carro se quedó atascado en el lodazal después de la fuerte lluvia.
C1 noun /əˈkuːstɪks/

acoustics

acústica
Meaning
the science of sound, or the properties of a space that affect how sound is heard
Example
The hall’s excellent acoustics made the orchestra sound rich and clear.
La excelente acústica del salón hizo que la orquesta sonara rica y clara.
C1 noun /ˌæntɪˈsiːdənt/

antecedent

antecedente
Meaning
something that came before; a previous event, condition, or cause
Example
The cultural antecedents of this festival go back centuries.
Los antecedentes culturales de este festival datan de siglos atrás.
C1 adjective ʌnˈjiːl.dɪŋ

unyielding

inquebrantable o firme
Meaning
Not easily broken or giving in to pressure.
Example
Her unyielding determination helped her overcome all challenges.
Su determinación inquebrantable la ayudó a superar todos los desafíos.
C2 noun /pɪˈnɒlədʒi/

penology

penología
Meaning
The study of prison management and criminal rehabilitation.
Example
He decided to specialize in penology to help improve the prison system.
Decidió especializarse en penología para ayudar a mejorar el sistema penitenciario.
C1 adjective /ˈpleɪntɪv/

plaintive

triste, lamentoso
Meaning
expressing sadness or sorrow
Example
He raised a plaintive cry for help.
Él levantó un grito lamentoso pidiendo ayuda.
C1 noun /siˈɛrə klʌb/

Sierra Club

Sierra Club
Meaning
An American environmental organization founded in 1892 by John Muir, focused on promoting conservation of the natural environment by influencing public policy decisions.
Example
John Muir founded the Sierra Club in 1892 to protect wild areas.
John Muir fundó el Sierra Club en 1892 para proteger áreas salvajes.
B1 noun /ˈsɜːrkəmstæns/

circumstance

circunstancia
Meaning
a fact or condition connected with an event or action
Example
She handled the difficult circumstances bravely.
Ella manejó valientemente las difíciles circunstancias.
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 adjective /ˈriː.zən.ə.bəl/

Reasonable

razonable; justo y práctico; no demasiado caro; lógico
Meaning
fair and sensible; not too expensive; logical and practical
Example
The hotel offers reasonable prices for quality accommodation.
El hotel ofrece precios razonables para alojamiento de calidad.
B1 noun /ˈɡæsəˌliːn/

gasoline

gasolina
Meaning
a liquid fuel made from petroleum, used mainly to power engines in vehicles
Example
The price of gasoline has increased significantly this month.
El precio de la gasolina ha aumentado significativamente este mes.
C2 verb /dɪsˈbɜːrdən/

disburden

aliviar
Meaning
to relieve someone of a burden or load
Example
She disburdened herself of worries by sharing them with her friend.
Ella se liberó de sus preocupaciones compartiéndolas con su amiga.
C2 noun /ˈdʒɪb.ɪt/

Gibbet

horca
Meaning
a gallows for hanging criminals; an upright post with a projecting arm for hanging the bodies of criminals
Example
In medieval times, criminals were often executed on a gibbet as a public warning.
En la Edad Media, los criminales a menudo eran ejecutados en una horca como advertencia pública.
B2 verb /ˌkoʊ.ɪnˈsaɪd/

coincide

coincidir
Meaning
To occur at the same time or to be in agreement.
Example
The meeting coincided with her birthday.
La reunión coincidió con su cumpleaños.
C1 noun /ˈɪnkjʊˌbeɪtər/

incubator

incubadora
Meaning
a device or environment that provides suitable conditions for eggs, cells, or infants to develop
Example
The premature baby was placed in an incubator for care.
El bebé prematuro fue colocado en una incubadora para su cuidado.
C2 noun /maɪˈkrɒmɪtər/

micrometer

micrómetro
Meaning
A device used for measuring small distances with great accuracy.
Example
The engineer used a micrometer to measure the thickness of the wire.
El ingeniero usó un micrómetro para medir el grosor del cable.
C2 adjective /ˈærənt/

arrant

completo, absoluto
Meaning
complete or utter (used negatively, e.g., 'arrant nonsense')
Example
His excuse was arrant nonsense.
Su excusa fue una tontería absoluta.
C1 noun ˌkæl.ɪˈbreɪ.ʃən

calibration

calibración
Meaning
The action or process of adjusting or determining the accuracy of measuring instruments.
Example
The accuracy of a scale depends on regular calibration.
La precisión de una balanza depende de una calibración regular.
C1 noun /əˈlɜːrtnəs/

alertness

estado de alerta
Meaning
the state of being mentally aware and quick to notice or respond; vigilance
Example
The driver maintained a high level of alertness during the long journey.
El conductor mantuvo un alto nivel de estado de alerta durante el viaje.
B2 noun /ˈɔːkɪstrə/

orchestra

orquesta
Meaning
a large group of musicians playing different instruments together
Example
The orchestra performed beautifully at the concert.
La orquesta actuó maravillosamente en el concierto.
C1 noun /ˈrɛtʃɪdnəs/

wretchedness

miseria
Meaning
a state of misery, unhappiness, or poor condition
Example
The novel depicts the wretchedness of war victims.
La novela muestra la miseria de las víctimas de la guerra.
B2 adjective /səbˈstæn.ʃəl/

Substantial

sustancial; considerable; importante
Meaning
large in size, amount, or importance; considerable; significant
Example
There was a substantial increase in sales this quarter.
Hubo un aumento sustancial en las ventas de este trimestre.
C1 noun /nɪl/

Nil

cero; nada
Meaning
nothing; zero; no amount
Example
His chances of winning were nil after the scandal.
Sus posibilidades de ganar eran nulas después del escándalo.