radioactivity
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B2 noun ˌreɪ.di.oʊ.ækˈtɪv.ə.ti

radioactivity

radiactividad
Meaning
The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Example
Radioactivity is used in medical treatments like cancer therapy.
La radioactividad se usa en tratamientos médicos como la terapia del cáncer.
C1 verb /ˌriː.ɪˈstæblɪʃ/

reestablish

restablecer
Meaning
to set up or restore something again after it has been disrupted
Example
The government worked hard to reestablish peace in the region.
El gobierno trabajó arduamente para restablecer la paz en la región.
C2 noun /ˈreɪləri/

raillery

burlas amistosas
Meaning
good-humored teasing or joking
Example
Their friendship was full of light-hearted raillery.
Su amistad estaba llena de bromas ligeras.
C2 noun /rɪˈɡætə/

regatta

regata
Meaning
A sporting event consisting of a series of boat or yacht races.
Example
The annual regatta attracted competitors from around the world.
La regata anual atrajo a competidores de todo el mundo.
C1 adjective /rɪˈdʌn.dənt/

redundant

innecesario
Meaning
Not or no longer needed or useful; superfluous.
Example
The report contained redundant information.
El informe contenía información innecesaria.
C2 adjective /ˈrɛkriənt/

recreant

cobarde, traidor
Meaning
cowardly or unfaithful to duty
Example
The recreant soldier abandoned his post in fear.
El soldado cobarde abandonó su puesto por miedo.
C2 verb /ˈreə.rɪ.faɪ/

rarefy

diluir, refinar
Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
El aire se diluye a medida que subes más alto en las montañas.
A2 noun /rent/

Rent

felicidad
Meaning
a payment made periodically by a tenant to a landlord for use of property
Example
The monthly rent for this apartment is quite affordable.
Ella no pudo ocultar su felicidad cuando recibió el premio.
B2 adjective /ˈrɪski/

risky

arriesgado
Meaning
Involving the possibility of danger, harm, or loss
Example
Investing in that startup is risky but could bring high rewards.
Invertir en esa startup es arriesgado, pero podria traer grandes recompensas.
C1 noun rɪˌdʒɛnəˈreɪʃən

regeneration

regeneración
Meaning
Renewal, growth and development of cells, tissues or energy
Example
Proper rest allows muscle regeneration after exercise.
El descanso adecuado permite la regeneración muscular después del ejercicio.
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 /ˈræp.tʃər/

rapture

éxtasis, rapto
Meaning
A feeling of intense joy, delight, or ecstasy.
Example
She listened to the music in rapture.
Ella escuchaba la música en éxtasis.
B1 verb /rɪˈvjuː/

review

revisar
Meaning
to examine or assess something again; to write a critical evaluation
Example
I need to review my notes before the exam.
Necesito revisar mis notas antes del examen.
C1 noun /ˌriː.dɪs.trɪˈbjuː.ʃən/

redistribution

redistribución
Meaning
The sharing of wealth or resources more equally among society.
Example
The government introduced a redistribution policy to reduce inequality.
El gobierno introdujo una política de redistribución para reducir la desigualdad.
B2 noun /rɒd/

rod

barra delgada, especialmente de metal o madera
Meaning
a thin straight bar, especially of metal or wood
Example
He used an iron rod to support the structure.
Usó una barra de hierro para soportar la estructura.
C1 verb /rɪˈsiːd/

recede

retroceder
Meaning
To move back or further away from a previous position.
Example
The floodwaters began to recede after the heavy rain stopped.
Las aguas de la inundación comenzaron a retroceder después de que la lluvia intensa paró.
B2 noun /ˈrʊki/

rookie

novato
Meaning
a person who is new to an activity or organization; a beginner
Example
The rookie policeman made a few mistakes on his first day.
El policía novato cometió algunos errores en su primer día.
C1 noun /rɪˈpɑːzɪtɔːri/

repository

repositorio
Meaning
a place where things are stored or kept for safekeeping
Example
The library serves as a repository of knowledge.
La biblioteca sirve como un repositorio de conocimiento.
B2 noun /ˈrɒbəɹi/

robbery

robo
Meaning
the crime of stealing from someone or somewhere using force or threat
Example
The police are investigating the robbery at the local store.
La policía está investigando el robo en la tienda local.
B2 verb /ˈroʊ.teɪt/

rotate

rotar
Meaning
to turn around a central point or axis
Example
The Earth rotates on its axis once every 24 hours.
La Tierra rota sobre su eje cada 24 horas.
B2 noun ˌrev.əˈluː.ʃənz

revolutions

revoluciones
Meaning
Dramatic and wide-reaching changes in political, social, or economic systems, often involving the overthrow of a government or social order.
Example
Revolutions often lead to significant societal changes.
Las revoluciones a menudo conducen a cambios sociales significativos.
C2 adjective /ˈreɪ.moʊs/

ramose

ramificado
Meaning
having many branches.
Example
The ramose tree shaded the entire garden.
El árbol ramificado dio sombra a todo el jardín.
C1 noun /ˈrɪdəns/

riddance

liberación
Meaning
The action of getting rid of something unwanted or unpleasant.
Example
His departure was considered a welcome riddance by the team.
Su partida fue considerada una bienvenida liberación por el equipo.
B1 adjective /ˈrel.ə.vənt/

Relevant

relevante
Meaning
closely connected or appropriate to what is being discussed; pertinent
Example
Please provide only relevant information for this discussion.
Por favor, proporcione solo información relevante para esta discusión.
C1 noun /ˈrɛtɪsəns/

reticence

reticencia
Meaning
the quality of being reserved or unwilling to speak freely
Example
His reticence made it difficult to know what he was thinking.
Su reticencia hizo que fuera difícil saber lo que estaba pensando.
A2 noun /rɒk/

rock

roca
Meaning
a large, solid piece of mineral matter
Example
The mountain was made of solid rock.
La montaña estaba hecha de roca sólida.
C1 adverb /rɪˈspek.tə.bli/

Respectably

de manera respetable; decente;
Meaning
in a way that is worthy of respect; decently; properly
Example
She was dressed respectably for the interview.
Ella estaba vestida de manera respetable para la entrevista.
B1 noun /rɪˈkwaɪə(r)mənt/

requirement

requisito
Meaning
something that is necessary or demanded
Example
The job has specific educational requirements.
El trabajo tiene requisitos educativos específicos.
A2 adverb /ˈrɑː.ðər/

Rather

preferentemente; en lugar de;
Meaning
to some extent; instead; preferably
Example
I would rather stay home than go to the party.
Preferiría quedarme en casa que ir a la fiesta.
C2 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

recapitular
Meaning
To summarize and state again the main points of something.
Example
The teacher asked the student to recapitulate the lesson.
El maestro pidió al estudiante que recapitulara la lección.
A2 noun /roʊz/

Rose

rosa
Meaning
a fragrant flower with thorny stems, typically red, pink, white, or yellow
Example
She gave me a beautiful red rose for Valentine's Day.
Ella me dio una hermosa rosa roja para el Día de San Valentín.
C1 verb /ˈrɛlɪɡeɪt/

relegate

relegar
Meaning
to assign to a lower rank, position, or category
Example
The manager decided to relegate the player to the bench.
El gerente decidió relegar al jugador al banco.
A1 verb /riːd/

read

leer
Meaning
to look at written words and understand their meaning
Example
I read books before going to bed.
Yo leo libros antes de acostarme.
A1 noun, verb /rɛst/

rest

descanso
Meaning
to cease work or movement in order to relax or recover strength
Example
He needs to rest after the long journey.
Él necesita descansar después del largo viaje.
A1 noun /ruːm/

room

habitación
Meaning
A space within a building enclosed by walls, floor, and ceiling
Example
She decorated her room with bright colors.
Ella decoró su habitación con colores brillantes.
C1 verb /ˌrevəˈluːʃənaɪz/

revolutionize

revolucionar
Meaning
Change (something) radically or fundamentally.
Example
Artificial intelligence is set to revolutionize the healthcare sector.
La inteligencia artificial está lista para revolucionar el sector de la salud.
C1 adjective /ˈræmʃækəl/

ramshackle

deteriorado
Meaning
poorly built or maintained; in a state of disrepair
Example
They lived in a ramshackle old house on the edge of town.
Vivían en una casa deteriorada en el borde de la ciudad.
C2 noun /ˈræpsədi/

rhapsody

canción exaltada/elogio
Meaning
an expression of great enthusiasm or an epic musical composition
Example
The singer’s performance was a rhapsody of emotions.
La actuación del cantante fue una rapsodia de emociones.
B2 noun rɪˈzentmənt

resentment

resentimiento
Meaning
Bitter indignation at having been treated unfairly.
Example
Resentment grew among the students.
El resentimiento creció entre los estudiantes.
B2 verb /reɪl/

rail

quejarse
Meaning
to complain or protest strongly about something
Example
He railed against the unfair decision.
Él se quejó contra la decisión injusta.
C1 adjective /ˈraʊ.di/

Rowdy

ruidoso; desordenado; alborotador
Meaning
disorderly; unruly; noisy and disruptive
Example
The rowdy children were making too much noise.
Los niños ruidosos estaban haciendo demasiado ruido.
B1 noun /ˌrɛdʒɪˈstreɪʃən/

registration

registro
Meaning
the action or process of enrolling or signing up for something
Example
The registration for the event will close tomorrow.
La inscripción para el evento se cerrará mañana.
B2 adjective ˌriːprəˈdʌktɪv

reproductive

reproductivo
Meaning
Relating to the reproduction of offspring.
Example
The reproductive cycle of pests can cause rapid infestations.
El ciclo reproductivo de las plagas puede causar infestaciones rápidas.
B2 adjective /rɪˈzɪstənt/

resistant

resistente
Meaning
not affected by something; able to oppose or withstand
Example
This fabric is resistant to water and stains.
Este tejido es resistente al agua y las manchas.
A2 noun /rɪˈleɪ.ʃən.ʃɪp/

Relationship

relación
Meaning
the way two people or groups feel and behave towards each other; a connection between two things
Example
They have a very close relationship.
Ellos tienen una relación muy cercana.
C2 adjective /rɪˈprɛsəbl̩/

repressible

reprimible
Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
El movimiento resultó ser casi reprimible.
B2 noun /red liːf/

Red leaf

hoja roja
Meaning
red-colored leafy vegetable; amaranth leaves used as greens
Example
Red leaf is rich in iron and is commonly eaten in Bengali households.
La hoja roja es rica en hierro y comúnmente se consume en los hogares bengalíes.
C1 noun/verb /rɪˈpoʊz/

repose

reposo
Meaning
a state of rest, sleep, or tranquility; to rest or lie in a peaceful position
Example
After the long journey, she sought repose in the quiet garden.
Después del largo viaje, ella buscó reposo en el jardín tranquilo.
C2 noun /ˈræp.aɪn/

rapine

saqueo
Meaning
the violent seizure of someone's property
Example
The war was marked by rapine and destruction.
La guerra estuvo marcada por el saqueo y la destrucción.
B2 verb /ˈrɛnəˌveɪt/

renovate

renovar
Meaning
to restore something old to a good state or to improve it
Example
They decided to renovate the old house before moving in.
Ellos decidieron renovar la casa vieja antes de mudarse.
B2 noun /ˈrerəti/

Rarity

la condición de ser raro; algo poco común o escaso
Meaning
the state of being rare; something that is uncommon or scarce
Example
The antique vase was a rarity worth thousands of dollars.
El jarrón antiguo era una rareza que valía miles de dólares.
A2 adjective /ruːd/

Rude

grosero; descortés; falto de civismo; áspero
Meaning
impolite; discourteous; lacking civility; rough or harsh in manner
Example
It was rude of him to interrupt the meeting.
Fue grosero interrumpir la reunión.
B1 noun /ˈrʌbər/

rubber

felicidad
Meaning
a tough elastic substance made from the latex of tropical plants or synthetically, used for making tires, boots, and other products.
Example
The tires are made of natural rubber.
Ella no pudo ocultar su felicidad cuando recibió el premio.
C1 verb /ˈræʃənaɪz/

rationlize

racionalizar
Meaning
to justify or explain something with logical reasons, even if not appropriate or true
Example
He tried to rationlize his mistake by blaming the system.
Él trató de racionalizar su error culpando al sistema.
B1 adjective ˈriː.dʒən.əl

regional

regional
Meaning
Relating to or characteristic of a region.
Example
Regional hubs support localized industries.
Los centros regionales apoyan a las industrias locales.
B2 noun /ˈraɪvəl/

Rival

rival; competidor;
Meaning
a person or thing competing with another for the same objective or for superiority in the same field
Example
The two companies have been business rivals for decades.
Las dos empresas han sido rivales comerciales durante décadas.
B2 adjective /rɪˈspɒn.sɪv/

Responsive

responsivo
Meaning
reacting quickly and positively; readily reacting to suggestions or changes
Example
The website is very responsive and loads quickly on all devices.
El sitio web es muy responsivo y carga rápidamente en todos los dispositivos.
A1 noun /reɪn/

Rain

lluvia
Meaning
water that falls from clouds in small drops
Example
The heavy rain forced us to stay indoors.
La lluvia intensa nos obligó a quedarnos adentro.
B2 verb rɪˈzaɪn

resign

renunciar
Meaning
Voluntarily leave a job or other position.
Example
Ministers were forced to resign.
Los ministros fueron obligados a renunciar.
C2 noun /rɪˈpæst/

repast

comida
Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
Disfrutaron de una deliciosa comida junto al río.
C1 verb /ˌriːˈvæmp/

revamp

rehacer
Meaning
To give a new and improved form, structure, or appearance to something.
Example
The company decided to revamp its website for a modern look.
La empresa decidió renovar su sitio web para darle un aspecto moderno.
B2 noun /ˈreɪtɪŋ/

rating

valoración
Meaning
an evaluation or assessment, usually numerical
Example
The movie received a high rating from critics.
La película recibió una alta valoración de los críticos.
C2 verb /ˈrʌstɪkeɪt/

rusticate

Ir al campo / expulsión temporal de la universidad
Meaning
To go to the countryside or to suspend someone from university.
Example
He decided to rusticate in the village to escape the busy city life.
Decidió ir al campo en el pueblo para escapar de la vida agitada de la ciudad.
B2 noun /ˈrɛlɪvənsi/

relevancy

relevancia
Meaning
the quality of being closely connected or appropriate
Example
The professor questioned the relevancy of the example to the topic.
El profesor cuestionó la relevancia del ejemplo con respecto al tema.
B2 adjective rəʊˈbʌst

robust

robusto
Meaning
Strong and healthy; vigorous; able to withstand or overcome adverse conditions.
Example
The robust infrastructure ensures reliable communication.
La robusta infraestructura asegura comunicación confiable.
B2 verb /rɪˈkruːt/

recruit

reclutar
Meaning
to enlist or hire people for a job, service, or membership
Example
The company is trying to recruit more software engineers.
La empresa está tratando de reclutar más ingenieros de software.
C2 adjective /rɪˈtɪkjʊlət/

reticulate

reticulado
Meaning
Having a net-like pattern or structure.
Example
The leaf had a reticulate pattern of veins.
La hoja tenía un patrón reticulado de venas.
C2 noun /ˈreɪmənt/

raiment

atuendo
Meaning
clothing, especially fine or formal wear
Example
The king wore royal raiment during the ceremony.
El rey usó atuendo real durante la ceremonia.
B2 adjective /ræʃ/

rash

impulsivo, imprudente
Meaning
Acting quickly without careful consideration; reckless.
Example
It was a rash decision to invest without research.
Fue una decisión imprudente invertir sin investigación.
B1 noun /ˈrezɪdənt/

Resident

residente
Meaning
a person who lives somewhere permanently or on a long-term basis; living in a particular place
Example
She has been a resident of this city for over ten years.
Ella ha sido residente de esta ciudad durante más de diez años.
C2 verb /rɪˈkænt/

recant

revocar
Meaning
to withdraw or renounce a statement or belief formally
Example
He recanted his previous statement in court.
Él retractó su declaración anterior en la corte.
B2 verb /rɪˈɡeɪn/

regain

recuperar
Meaning
to get back something that was lost; to recover
Example
He regains his strength after the illness.
Él recupera su fuerza después de la enfermedad.
C2 adjective /roʊˈtʌnd/

rotund

redondeado
Meaning
round or plump in shape; full in sound
Example
The rotund cat struggled to climb the fence.
El gato redondeado luchaba por subir la valla.
C2 verb /rɪˈsɪnd/

rescind

rescindir
Meaning
to revoke, cancel, or repeal a law, order, or agreement
Example
The company decided to rescind the job offer.
La empresa decidió rescindir la oferta de trabajo.
C1 noun /rɪˈpɔːrtɪʒ/

reportage

reportaje
Meaning
the act of reporting news or describing events in the media
Example
The magazine is known for its detailed reportage of political issues.
La revista es conocida por su detallado reportaje de temas políticos.
B1 adjective /rɪˈkwaɪəd/

required

requerido
Meaning
necessary or compulsory
Example
A visa is required to enter the country.
Se requiere una visa para entrar al país.
C1 noun ˈrez.ɪ.djuː

residue

residuo
Meaning
A small amount of something that remains after the main part has gone or been removed.
Example
Soap residue affects appliance efficiency.
El residuo de jabón afecta la eficiencia de los aparatos.
C1 verb /riːl/

reel

tropezar / enrollar
Meaning
to lose balance and stagger; to wind or spin something onto a reel
Example
He reeled backward after being punched.
Se tropezó hacia atrás después de ser golpeado.
C2 noun /ˈrɛvəlri/

revelry

fiesta
Meaning
Lively and noisy festivities, especially involving drinking and dancing.
Example
The sound of revelry could be heard throughout the night.
Se escuchaba el sonido de la fiesta durante toda la noche.
B2 noun /ræntʃ/

ranch

granja ganadera
Meaning
a large farm where animals such as cattle or sheep are raised
Example
They own a huge cattle ranch in Texas.
Ellos poseen una granja ganadera enorme en Texas.
B1 noun /roʊp/

rope

cuerda
Meaning
a strong, thick cord made of twisted fibers or strands
Example
The climbers used a rope to scale the mountain.
Los escaladores usaron una cuerda para escalar la montaña.
B2 adjective /rɪˈspek.tɪv/

Respective

respectivo; correspondiente
Meaning
belonging to each individual; particular to each
Example
The students returned to their respective classrooms after lunch.
Los estudiantes regresaron a sus respectivas aulas después del almuerzo.
C1 noun /ˌriːhəˌbɪlɪˈteɪʃən/

rehabilitation

felicidad
Meaning
the process of restoring someone or something to health or normal life through training or therapy
Example
After the accident, he went through months of rehabilitation to walk again.
Ella no pudo esconder su felicidad cuando recibió el premio.
B2 verb /ˌriː.ɪnˈfɔːrs/

reinforce

fortalecer
Meaning
To strengthen or support something with additional material, people, or effort.
Example
The teacher used examples to reinforce the lesson.
El maestro usó ejemplos para reforzar la lección.
B2 verb /reɪd/

raid

redada
Meaning
to attack suddenly; to search and seize
Example
Police raid the illegal gambling house.
La policía realiza una redada en la casa de apuestas ilegal.
C2 noun /ræŋˈɡuːn ˈkriːpər/

Rangoon creeper

Rangoon creeper
Meaning
A climbing vine with fragrant flowers that change color from white to pink to red
Example
The Rangoon creeper covered the entire fence with its sweet-smelling flowers.
El Rangoon creeper cubrió toda la cerca con sus flores de fragancia dulce.
C1 noun /rɪˈzʌmp.ʃən/

Resumption

reanudar
Meaning
the action of beginning something again after a pause or interruption
Example
The resumption of classes will be announced next week.
La reanudación de las clases será anunciada la próxima semana.
B1 noun /rɪˈpɔːtɪŋ/

reporting

informes
Meaning
the act of giving news or information about something
Example
Good reporting is essential for public awareness.
Un buen informe es esencial para la conciencia pública.
B2 noun /ˈroʊ.lɪŋ pɪn/

Rolling pin

rodillo
Meaning
a cylindrical tool used for rolling out dough or pastry
Example
Roll the dough flat with a rolling pin.
Extiende la masa con un rodillo.
B2 noun /ˌreɡ.jʊˈlær.ɪ.ti/

Regularity

regularidad
Meaning
the quality of being regular; occurring at fixed intervals or in a consistent pattern
Example
The regularity of his exercise routine helped him stay healthy.
La regularidad de su rutina de ejercicios lo ayudó a mantenerse saludable.
B2 verb /roʊm/

roam

deambular
Meaning
to walk or travel without a specific destination; to wander
Example
Wild animals roam freely in the forest.
Los animales salvajes deambulan libremente en el bosque.
B1 noun /ˈreɪn.boʊ/

Rainbow

arco iris
Meaning
an arch of colors formed in the sky by sunlight shining through rain
Example
After the storm, a beautiful rainbow appeared in the sky.
Después de la tormenta, apareció un hermoso arco iris en el cielo.
C1 adjective /ˈroʊtəri/

rotary

rotatorio
Meaning
Relating to or characterized by rotation; revolving around an axis.
Example
The machine uses a rotary engine to function efficiently.
La máquina usa un motor rotatorio para funcionar eficientemente.
B2 verb /ˌriːəˈʃʊr/

reassure

tranquilizar
Meaning
to say or do something to remove someone's doubts or fears
Example
The teacher reassured the students before the exam.
El maestro tranquilizó a los estudiantes antes del examen.
B1 noun ˌrekəɡˈnɪʃn

recognition

reconocimiento
Meaning
Acknowledgment of the existence, validity, or legality of something; appreciation or acclaim for an achievement, service, or ability.
Example
He earned recognition after years of struggle.
Él ganó reconocimiento después de años de lucha.
C2 adjective rɪˈtɛn.tɪv

retentive

retentivo
Meaning
Having strong memory or the ability to retain information for a long time.
Example
Students with a retentive memory excel in academics.
Los estudiantes con una memoria retentiva sobresalen en los estudios.
A2 noun /ˈreɪl.weɪ/

Railway

ferrocarril
Meaning
a track made of steel rails along which trains run; a system of tracks with trains, stations, and other facilities
Example
The railway connects major cities across the country.
El ferrocarril conecta las principales ciudades del país.
B1 verb /rɪˈdʒekt/

reject

rechazar
Meaning
to refuse to accept or consider something
Example
The committee decided to reject the proposal.
El comité decidió rechazar la propuesta.
B2 verb /ˌriːprəˈdjuːs/

reproduce

reproducir, procrear
Meaning
To make a copy of something; to generate offspring.
Example
Many animals reproduce rapidly in favorable conditions.
Muchos animales se reproducen rápidamente en condiciones favorables.
B1 noun /rɪˈliːf/

Relief

alivio; comodidad; asistencia
Meaning
a feeling of comfort after worry or distress; assistance given to those in need
Example
She felt great relief when the exam was over.
Ella sintió un gran alivio cuando el examen terminó.
B1 verb /rɪˈviːl/

reveal

revelar
Meaning
to make known or show something that was hidden
Example
The investigation revealed the truth.
La investigación reveló la verdad.
C1 adjective /ˈreɪ.si/

racy

picante
Meaning
Lively, entertaining, or slightly shocking (especially in a sexual way).
Example
The novel was full of racy dialogues.
La novela estaba llena de diálogos picantes.
A1 adjective /red/

Red

rojo
Meaning
having the color of blood or fire; of the color red
Example
She wore a beautiful red dress to the party.
Ella llevaba un hermoso vestido rojo a la fiesta.
B2 verb /rɪˈsaɪt/

recite

recitar
Meaning
To say aloud something learned, especially poetry or text, from memory.
Example
The child recited a poem in front of the class.
El niño recitó un poema frente a la clase.
B2 noun /ˈrɛzərvwɑːr/

reservoir

embalse
Meaning
A large natural or artificial lake used as a source of water supply.
Example
The city built a new reservoir to ensure enough drinking water for its residents.
La ciudad construyó un nuevo embalse para garantizar suficiente agua potable para sus residentes.
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.
C1 noun /ˈræftər/

rafter

viga
Meaning
One of the sloping beams that supports a roof.
Example
The old barn’s rafters were exposed.
Las vigas del viejo granero estaban expuestas.
C2 noun /ˈriːdʒənt/

regent

regente
Meaning
a person who rules in place of a monarch when the monarch is absent or too young
Example
The prince acted as regent until the king came of age.
El príncipe actuó como regente hasta que el rey alcanzó la mayoría de edad.
C1 adjective /ˈrævənəs/

ravenous

hambriento
Meaning
Extremely hungry; famished.
Example
After the long hike, she was ravenous and ate quickly.
Después de la larga caminata, ella estaba famélica y comió rápidamente.
C2 noun /rɪˈmɒnstrəns/

remonstrance

protesta
Meaning
A forceful protest or objection.
Example
The workers’ remonstrance against unfair treatment was ignored.
La protesta de los trabajadores contra el trato injusto fue ignorada.
B1 noun /ˈriː.dʒən/

Region

región; área; zona
Meaning
a particular area or part of a country or the world
Example
This region is famous for its wine production.
Esta región es famosa por su producción de vino.
B2 verb /rɪˈliːv/

relieve

aliviar
Meaning
to make pain, distress, or difficulty less severe or serious
Example
The medicine helped relieve his headache.
La medicina ayudó a aliviar su dolor de cabeza.
C2 verb /rɪˈspaɪər/

respire

respirar
Meaning
To breathe in and out; to inhale and exhale.
Example
Plants also respire to release energy.
Las plantas también respiran para liberar energía.
B2 verb /rɪˈteɪn/

retain

retener
Meaning
to keep possession of something
Example
The company decided to retain its experienced employees.
La empresa decidió retener a sus empleados experimentados.
C1 verb /rɪˈtreɪs/

retrace

volver sobre un camino o ruta, recordar y repetir pasos anteriores
Meaning
to go back over a path or route; to recall and repeat steps taken earlier
Example
She retraced her steps to find her lost keys.
Ella volvió sobre sus pasos para encontrar sus llaves perdidas.
A1 verb /raɪd/

ride

montar/montar en
Meaning
to travel on or in a vehicle; to sit on and control a horse
Example
She likes to ride her bicycle to work.
A ella le gusta montar su bicicleta al trabajo.
B1 verb /rɪˈɡɑːrd/

regard

considerar
Meaning
to consider or think of in a particular way; to look at
Example
She regards him as her best friend.
Ella lo considera su mejor amigo.
C2 adjective /rəˈpeɪ.ʃəs/

rapacious

rapaz
Meaning
having an extreme desire to take things for oneself, greedy
Example
The rapacious landlord raised the rent without reason.
El dueño de la casa rapaz subió el alquiler sin razón.
C1 noun ˈredʒ.ɪ.strɑːr

registrar

registrador
Meaning
An official responsible for keeping records or registers.
Example
The registrar oversees all administrative tasks.
El registrador supervisa todas las tareas administrativas.
C1 adjective /rɪˈvɜː.sə.bəl/

Reversible

reversible
Meaning
able to be turned the other way around; able to be undone or changed back
Example
This jacket is reversible and can be worn on both sides.
Esta chaqueta es reversible y se puede usar por ambos lados.
C1 noun /rɪˌdʒuːvəˈneɪʃən/

rejuvenation

rejuvenecimiento
Meaning
The process of restoring something to a former better state, especially referring to renewing soil fertility or revitalizing agricultural land through various restoration practices.
Example
Rejuvenation of soil is necessary for sustainable agriculture.
El rejuvenecimiento del suelo es necesario para la agricultura sostenible.