rule
All a b c d e f g h i j k l m n o p q r s t u v w x y z
All CEFR A1 A2 B1 B2 C1 C2
Content locale
EN English BN Bengali HI Hindi ES Español FR Francés DE Alemán RU Ruso ZH Chino JA Japonés
All Vocabulary Cards All Vocabularies
A2 noun /ruːl/

rule

regla
Meaning
an accepted principle or instruction that states what is allowed or what must be done.
Example
There are strict rules about safety in the lab.
Hay reglas estrictas sobre la seguridad en el laboratorio.
C2 noun /rɪˈsɪdɪˌvɪzəm/

recidivism

recidivismo
Meaning
The tendency of a convicted criminal to reoffend or relapse into criminal behavior.
Example
The government introduced new programs to reduce recidivism among former inmates.
El gobierno introdujo nuevos programas para reducir el recidivismo entre antiguos reclusos.
B1 verb /rʌb/

rub

frotar
Meaning
to press and move something firmly against a surface; to apply pressure with movement
Example
She rubbed her hands together to keep them warm.
Ella frotó sus manos juntas para mantenerlas calientes.
C2 noun /ˈrɛkluːsəri/

reclusory

lugar de retiro
Meaning
A place for seclusion or retreat, especially for a recluse or hermit.
Example
The monk spent years in the reclusory away from society.
El monje pasó años en el lugar de retiro alejado de la sociedad.
C1 verb /rɪˈkaʊnt/

recount

relatar
Meaning
to narrate or tell the details of an event or experience
Example
She recounted her adventures during the summer trip.
Ella relató sus aventuras durante el viaje de verano.
C1 noun /ˌrɛmɪˈnɪsəns/

reminiscence

rememoración
Meaning
a story or memory about past events
Example
He shared a reminiscence of his childhood days in the village.
Él compartió una rememoración de sus días de infancia en el pueblo.
B1 adjective rɪˈlaɪ.ə.bəl

reliable

confiable
Meaning
Consistently good in quality or performance; able to be trusted.
Example
Reliable systems ensure efficiency.
Los sistemas confiables garantizan la eficiencia.
A2 verb /rɪŋ/

ring

sonar
Meaning
to make a clear sound like a bell; to call by telephone
Example
The bell rings every hour.
La campana suena cada hora.
B2 noun rɪsk ˈfæktər

risk factor

factor de riesgo
Meaning
Something that increases the likelihood of developing a disease or condition
Example
Water pollution is a significant risk factor for health.
La contaminación del agua es un factor de riesgo significativo para la salud.
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 /rɪˈvendʒ/

Revenge

venganza
Meaning
the action of inflicting hurt or harm on someone for an injury or wrong suffered at their hands
Example
She sought revenge against those who betrayed her trust.
Ella buscó venganza contra aquellos que traicionaron su confianza.
C2 noun /ˌrækənˈtɜːr/

Raconteur

felicidad
Meaning
a person who tells anecdotes in a skillful and amusing way
Example
The old man was a gifted raconteur who entertained everyone with his stories.
Ella no pudo ocultar su felicidad cuando recibió el premio.
C1 noun /ˈrʌfiən/

Ruffian

bribón; persona violenta;
Meaning
a violent person, especially one involved in crime; a brutal or lawless person
Example
The ruffian threatened the shopkeeper for money.
El bribón amenazó al tendero por dinero.
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.
C2 adjective /rɪˈmɪs/

remiss

negligente
Meaning
Negligent in performing a duty or responsibility.
Example
The manager was remiss in not checking the financial reports carefully.
El gerente fue negligente al no revisar cuidadosamente los informes financieros.
B2 noun ˈruθləs ˌkɑmpəˈtɪʃən

ruthless competition

competencia despiadada
Meaning
Fierce and merciless rivalry or contest, without pity or compassion.
Example
Ruthless competition for power leads to societal issues.
La competencia despiadada por el poder lleva a problemas sociales.
B2 verb /rɪˈfreʃ/

refresh

refrescar
Meaning
to make fresh again; to restore energy
Example
A cold drink refreshes me on hot days.
Una bebida fría me refresca en los días calurosos.
C2 adjective /ˈrʌdi/

ruddy

sonrosado
Meaning
Having a healthy red color in the face.
Example
She had a ruddy complexion from working outdoors.
Tenía un rostro sonrosado por trabajar al aire libre.
B2 verb /riːˈɔːrɡənaɪz/

reorganize

reorganizar
Meaning
to arrange something again in a different way for greater efficiency or order
Example
The manager decided to reorganize the team structure.
El gerente decidió reorganizar la estructura del equipo.
B1 adjective /rɪˈdɪk.jə.ləs/

Ridiculous

ridículo; absurdo; tonto
Meaning
extremely silly or unreasonable; deserving or causing laughter
Example
The idea of building a house without tools is ridiculous.
La idea de construir una casa sin herramientas es ridícula.
B1 noun riˈækʃən

reaction

reacción
Meaning
An action performed or a feeling experienced in response to a situation or event.
Example
The arrests triggered a reaction.
Las detenciones desencadenaron una reacción.
A2 adverb /ˈrɛə(r)li/

rarely

raramente
Meaning
not often, infrequently
Example
She rarely eats sweets because of her diet.
Ella rara vez come dulces debido a su dieta.
C1 adjective /rɪˈper.ə.bəl/

Repairable

reparable
Meaning
able to be fixed or mended; capable of being repaired
Example
The broken phone is repairable with the right parts.
El teléfono roto se puede reparar con las piezas adecuadas.
B2 noun /rɪˈstreɪnt/

Restraint

restricción; autocontrol
Meaning
the action of keeping someone or something under control; self-control
Example
She showed great restraint in not responding to the criticism.
Ella mostró gran restricción al no responder a la crítica.
B1 adjective /ˈrel.ə.tɪv/

Relative

relativo
Meaning
considered in comparison to something else; not absolute; comparative
Example
The cost of living is relative to your income level.
El costo de vida es relativo a tu nivel de ingresos.
C2 verb /rɪˈfrækt/

refract

refractar
Meaning
To bend light, sound, or heat as it passes through a medium.
Example
The water refracts light, making the straw look bent.
El agua refracta la luz, haciendo que la pajilla se vea doblada.
C1 noun rɪˈdʌndənsi

redundancy

redundancia, exceso
Meaning
The state of being not or no longer needed or useful; superfluousness.
Example
The redundancy in the company's workforce led to many layoffs.
La redundancia en la fuerza laboral de la empresa condujo a muchos despidos.
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.
C2 noun /ˈriːbəs/

rebus

rebus
Meaning
a puzzle in which words are represented by pictures, symbols, or letters
Example
The children enjoyed solving the rebus puzzles in the magazine.
A los niños les encantaba resolver los rompecabezas de rebus en la revista.
C2 noun /ˌræʃioʊsɪˈneɪʃən/

ratiocination

razonamiento
Meaning
the process of reasoning or logical thinking
Example
His ratiocination impressed the judges during the debate.
Su razonamiento impresionó a los jueces durante el debate.
C2 noun /ˌrɛprəˈbeɪʃən/

reprobation

reprobación
Meaning
Strong disapproval or condemnation; rejection by God as beyond salvation.
Example
The teacher’s face showed clear reprobation at the student’s rude remark.
El rostro del profesor mostró una clara reprobación ante el comentario grosero del estudiante.
C1 adjective /ˈrɛtroʊˌɡreɪd/

retrograde

retrógrado
Meaning
moving backward or returning to a worse condition
Example
The policy was seen as a retrograde step for human rights.
Se consideró que la política era un paso retrógrado para los derechos humanos.
C1 noun /ˈrɛzɪn/

resin

resina
Meaning
a sticky organic substance, usually secreted by plants, often used in varnishes or plastics
Example
The craftsman used natural resin to make the sculpture shine.
El artesano usó resina natural para hacer que la escultura brillara.
C1 verb /ˌriːˈkæl.ɪ.breɪt/

recalibrate

recalibrar, ajustar nuevamente
Meaning
To calibrate again or differently; to adjust or correct something based on new information or changed circumstances.
Example
The company had to recalibrate its strategies to adapt to the market.
La empresa tuvo que recalibrar sus estrategias para adaptarse al mercado.
B1 noun /ruːt/

Root

raíz; origen; base; causa
Meaning
the part of a plant that grows underground; the basic cause, source, or origin of something
Example
We need to find the root of this problem to solve it permanently.
Necesitamos encontrar la raíz de este problema para resolverlo permanentemente.
B2 adjective /rɪˈfreʃ.ɪŋ/

Refreshing

refrescante
Meaning
making one feel energized and renewed; pleasantly new or different
Example
The cool breeze was refreshing after the hot day.
La brisa fresca fue refrescante después del día caluroso.
B2 noun /rɛlm/

realm

reino, dominio, ámbito, esfera
Meaning
A kingdom or domain; a field or area of activity or interest.
Example
He is well known in the realm of science.
Él es bien conocido en el ámbito de la ciencia.
C1 adjective /ˈrɛvərənt/

reverent

reverente
Meaning
Showing deep and solemn respect.
Example
They listened to the speech in a reverent silence.
Escucharon el discurso en un silencio reverente.
C1 noun /ræmˈbuːtən/

Rambutan

rambután
Meaning
a tropical fruit with red spiky skin and white translucent sweet flesh similar to litchi
Example
The rambutan looks scary with its hairy skin but tastes very sweet inside.
El rambutan se ve aterrador con su piel peluda, pero tiene un sabor muy dulce por dentro.
B2 noun /rɪˈmeɪnz/

remains

restos
Meaning
the parts, pieces, or substances that are left after the rest has been used or removed
Example
The remains of the meal were left on the table.
Los restos de la comida quedaron en la mesa.
C2 adjective /ˌriːkruːˈdɛsənt/

recrudescent

recrudescente
Meaning
reviving or breaking out again after a period of abatement
Example
Recrudescent tensions threatened the fragile ceasefire.
Las tensiones recrudecientes amenazaron el frágil alto el fuego.
C2 noun /rɪˈpruːf/

reproof

reprobación, censura
Meaning
An expression of blame or disapproval.
Example
His careless words drew a sharp reproof from his mother.
Sus palabras descuidadas provocaron una fuerte reprobación de su madre.
B1 noun rəʊlz

Roles

rol
Meaning
A person's or thing's function in a particular situation.
Example
Defined roles improve team performance.
Los roles definidos mejoran el rendimiento del equipo.
C1 adjective /rɪˈpliːt/

replete

repleto
Meaning
Filled or well-supplied with something; abundantly full.
Example
The book is replete with fascinating historical details.
El libro está repleto de fascinantes detalles históricos.
C1 noun /ˈroʊ.lɪŋ bɔːrd/

Rolling board

mesa de amasar
Meaning
a flat wooden or marble surface used for rolling out dough
Example
She placed the dough on the rolling board.
Ella colocó la masa sobre la mesa de amasar.
A2 noun /ˈruːlər/

ruler

gobernante; regla
Meaning
A person who governs or controls a country; a straight-edged tool used for measuring or drawing lines
Example
The ruler drew a straight line on the paper while the king was a powerful ruler of his kingdom.
El ruler dibujó una línea recta en el papel mientras el rey era un poderoso ruler de su reino.
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

reconocer
Meaning
to make a preliminary inspection or survey, especially of an area for military or strategic purposes
Example
The soldiers reconnoitered the area before advancing.
Los soldados reconocieron el área antes de avanzar.
B2 verb /rɪˈzaɪd/

reside

residir
Meaning
to live or dwell in a particular place
Example
They reside in a large house near the river.
Ellos residen en una casa grande cerca del río.
C1 noun /rɪˈdʌn.dəns/

Redundance

redundancia
Meaning
the state of being not or no longer needed or useful; superfluous repetition of information
Example
The document contained redundance that made it unnecessarily long.
El documento contenía redundancia que lo hacía innecesariamente largo.
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.
C1 adjective /rɪˈbel.jəs/

Rebellious

rebelde; desobediente; que resiste la autoridad;
Meaning
defying authority; resisting control; disobedient;
Example
The rebellious teenager refused to follow his parents' rules.
El adolescente rebelde se negó a seguir las reglas de sus padres.
C2 verb /rɪˈmɒnstreɪt/

remonstrate

protestar
Meaning
To make a forceful protest or objection.
Example
Citizens remonstrated against the new tax policy.
Los ciudadanos protestaron contra la nueva política fiscal.
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.
C1 adjective /rɪˈvenʒ.fəl/

Revengeful

vengativo
Meaning
seeking or desiring revenge; vindictive
Example
He became revengeful after being betrayed by his friend.
Se volvió vengativo después de ser traicionado por su amigo.
C1 verb /rɪˈfjuːt/

refute

refutar
Meaning
To prove a statement, argument, or theory to be false or invalid.
Example
The lawyer refuted the witness's testimony with solid evidence.
El abogado refutó el testimonio del testigo con pruebas sólidas.
C2 noun /rɪˈpoʊst/

riposte

replica aguda
Meaning
a quick and clever reply to criticism or an insult
Example
Her sharp riposte left everyone in silence.
Su aguda réplica dejó a todos en silencio.
C1 noun /ˈreɪ.biːz/

rabies

rabia
Meaning
A viral disease that causes inflammation of the brain in humans and other mammals, usually transmitted through animal bites.
Example
The dog was vaccinated against rabies.
El perro fue vacunado contra la rabia.
B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

reforzamiento
Meaning
Strengthening or supporting something, especially behavior or learning.
Example
Positive reinforcement helps in learning.
El refuerzo positivo ayuda en el aprendizaje.
C1 verb /ˈrævɪdʒ/

ravage

devastar
Meaning
to cause severe and extensive damage or destruction
Example
The hurricane ravaged the coastal villages.
El huracán devastó las aldeas costeras.
C1 noun /ˈrɛl.ɪk/

relic

reliquia
Meaning
an object surviving from an earlier time, often of historical or religious interest
Example
The museum displayed relics from the ancient civilization.
El museo exhibió reliquias de la antigua civilización.
C1 adjective /rɪˈtɜː.nə.bəl/

Returnable

devolvible
Meaning
able to be returned or given back
Example
The bottle is returnable for a deposit refund.
La botella es devolvible para un reembolso del depósito.
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.
B2 noun /raɪˈnɒs.ər.əs/

Rhinoceros

rinoceronte
Meaning
a large, heavy animal with thick skin and one or two horns on its nose
Example
The rhinoceros charged through the grassland.
El rinoceronte cargó a través de la pradera.
B2 verb /ˌriːkriˈeɪt/

recreate

recrear
Meaning
to create or produce something again, especially a new version of something lost or destroyed
Example
The team recreated the lost dataset from backups.
El equipo recreó el conjunto de datos perdido desde las copias de seguridad.
C2 noun /rɪˈfræk.tər/

refractor

refractor
Meaning
A type of telescope that uses lenses to focus light.
Example
Refractor telescopes use lenses to focus light.
Los telescopios refractores usan lentes para enfocar la luz.
C1 noun /ˈrɛt.ər.ɪk/

rhetoric

el arte de hablar o escribir de manera efectiva o persuasiva
Meaning
The art of effective or persuasive speaking or writing; skillful use of language to influence others.
Example
Political leaders often use rhetoric to influence people.
Los líderes políticos a menudo utilizan la retórica para influir en la gente.
A2 verb /rɪˈkwaɪər/

require

necesitar
Meaning
to need something; to demand or insist on
Example
This job requires excellent communication skills.
Este trabajo requiere excelentes habilidades de comunicación.
A2 noun /reɪs/

race

carrera
Meaning
a competition of speed, or a group of people with similar characteristics
Example
The race was very exciting, with many competitors.
La carrera fue muy emocionante, con muchos competidores.
B2 noun /rɪˈzembləns/

Resemblance

semejanza
Meaning
the state of being alike or similar; similarity in appearance or character
Example
There's a strong resemblance between the two sisters.
Hay una fuerte semejanza entre las dos hermanas.
C1 noun/verb /rɪˈpriːz/

reprise

repetición
Meaning
A repetition or return to an earlier theme, role, or action.
Example
The actor reprised his role in the sequel.
El actor repitió su papel en la secuela.
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 adverb /ˈraɪtli/

Rightly

correctamente; adecuadamente; justamente
Meaning
correctly; properly; justly
Example
She rightly pointed out the mistakes in the report.
Ella señaló correctamente los errores en el informe.
C2 adjective /rɪˈmjuːnərətɪv/

remunerative

remunerativo
Meaning
Financially rewarding or profitable.
Example
He chose a remunerative career in medicine.
Eligió una carrera remunerada en medicina.
B2 noun /ˈroʊstɪd miːt/

Roasted meat

carne asada
Meaning
meat cooked by dry heat in an oven or over fire
Example
The roasted meat was perfectly seasoned and tender.
La carne asada estaba perfectamente sazonada y tierna.
C2 noun /ˈræŋ.kər/

rancor

rencor
Meaning
A feeling of deep and bitter anger or resentment.
Example
There was a rancor between the two rivals that never faded.
Hubo un rencor entre los dos rivales que nunca se desvaneció.
A2 preposition /riː/

re

respecto a
Meaning
concerning or about (used in formal letters or emails)
Example
The letter was sent re your recent application.
La carta fue enviada respecto a tu reciente solicitud.
B2 adjective /ˈruːθ.ləs/

Ruthless

despiadado; cruel; sin compasión
Meaning
showing no pity or compassion; cruel; merciless
Example
The ruthless dictator showed no mercy to his enemies.
El dictador despiadado no mostró misericordia a sus enemigos.
C1 verb /rɪˈɡrɛs/

regress

retroceder
Meaning
To return to a former or less developed state.
Example
Without proper guidance, the child's progress began to regress.
Sin una guía adecuada, el progreso del niño comenzó a retroceder.
A2 verb /rɪˈsiːv/

receive

recibir
Meaning
to get or accept something given; to welcome
Example
She receives a gift from her friend.
Ella recibe un regalo de su amiga.
B1 noun /rɪˈsep.ʃən/

Reception

recepción; recepción formal; bienvenida;
Meaning
the action of receiving something or someone; a formal social occasion held to welcome someone
Example
The wedding reception was held at a beautiful hotel.
La recepción de la boda se celebró en un hermoso hotel.
B1 noun /rɪˈvɪʒ.ən/

Revision

revisión; edición revisada
Meaning
the action of revising; a revised edition or form of something; review of subject matter
Example
The students spent hours doing revision for their final exams.
Los estudiantes pasaron horas haciendo revisión para sus exámenes finales.
B2 noun /'ræd.ɪʃ/

Radish

rábano
Meaning
a small pungent edible root vegetable with white or red skin
Example
The farmer harvested fresh radishes from the garden.
El agricultor cosechó rábanos frescos del jardín.
C1 verb /ræsp/

rasp

hablar de forma áspera o raspar con un sonido grueso
Meaning
to speak in a rough, harsh voice or to scrape with a coarse sound
Example
He rasped out a warning before collapsing.
él raspó una advertencia antes de desmayarse.
C1 adjective /ˈrʌs.tɪk/

Rustic

sencillo y no sofisticado; relacionado con áreas rurales
Meaning
simple and unsophisticated; relating to rural areas
Example
The rustic cottage had wooden beams and a thatched roof.
La cabaña rústica tenía vigas de madera y un techo de paja.
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.
B1 adjective, noun /ˈroʊmən/

roman

romano / ciudadano romano
Meaning
relating to Rome or its people; a citizen of ancient Rome
Example
The Roman Empire influenced much of modern civilization.
El Imperio Romano influyó en gran parte de la civilización moderna.
B2 noun /rɪˈstrɪk.ʃən/

Restriction

restricción; limitación; control
Meaning
a limiting condition or measure; the limitation or control of someone or something
Example
There are strict restrictions on smoking in public places.
Hay estrictas restricciones sobre fumar en lugares públicos.
B2 noun /ˌrɛɡ.jʊˈleɪ.ʃən/

regulation

una norma o directriz hecha y mantenida por una autoridad
Meaning
A rule or directive made and maintained by an authority.
Example
Government regulation ensures fair business practices.
La regulación gubernamental asegura prácticas comerciales justas.
C1 noun /ˈriːpər/

reaper

una persona o máquina que corta y recoge cultivos
Meaning
a person or machine that cuts and gathers crops
Example
The reaper moved slowly through the golden fields.
El ríper se movió lentamente a través de los campos dorados.
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.
A2 noun /ˈriː.zənz/

reasons

razones
Meaning
Causes, explanations, or justifications for an action or event.
Example
Reasons for pollution need addressing urgently.
Las razones de la contaminación deben abordarse urgentemente.
C2 noun /ˈruː.mɪ.nənt/

ruminant

rumiante
Meaning
a cud-chewing mammal, such as a cow or sheep
Example
Cows are ruminants that chew cud.
Las vacas son rumiantes que mastican bolo alimenticio.
C1 noun /ˌres.ɪˈteɪ.ʃən/

Recitation

recitación
Meaning
the action of reciting or repeating aloud from memory
Example
The poetry recitation contest was held in the auditorium.
El concurso de recitación de poesía se llevó a cabo en el auditorio.
B2 verb /rɒt/

rot

podrir
Meaning
to decay or decompose; to become corrupt
Example
The fruit will rot if left in the sun.
La fruta se pudrirá si se deja al sol.
B2 adjective /rɪˈzɪl.i.ənt/

resilient

resistente
Meaning
Able to withstand or recover quickly from difficult conditions.
Example
Resilient materials ensure durability.
Los materiales resistentes aseguran durabilidad.
B2 adjective /ˈrɑː.ki/

Rocky

rocoso; inestable; difícil
Meaning
full of rocks; unsteady; difficult
Example
The rocky path made hiking difficult for the tourists.
El camino rocoso hizo que el senderismo fuera difícil para los turistas.
C2 verb /ˈræpsəˌdaɪz/

rhapsodize

hablar con entusiasmo
Meaning
to speak or write with great enthusiasm and admiration
Example
He would often rhapsodize about his travels to Europe.
Él a menudo hablaba con entusiasmo sobre sus viajes a Europa.
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.
C1 verb /rɪˈtrækt/

retract

retirar
Meaning
to withdraw a statement, promise, or part of the body; to pull back
Example
The company retracted its earlier statement after realizing the error.
La empresa retractó su declaración anterior después de darse cuenta del error.
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 /riˈæktənt/

reactant

reactante
Meaning
A substance that takes part in and undergoes change during a chemical reaction.
Example
Oxygen is a reactant in the process of combustion.
El oxígeno es un reactante en el proceso de combustión.
C1 noun /ˈrem.nənt/

Remnant

resto
Meaning
a small remaining quantity of something; a piece of cloth left over after the main piece has been used
Example
Only a remnant of the ancient wall remains.
Solo queda un resto de la antigua muralla.
C2 adjective /raɪˈpɛə.ri.ən/

riparian

relativo o situado en las orillas de un río u otro cauce de agua
Meaning
Relating to or situated on the banks of a river or other watercourse.
Example
Riparian vegetation helps prevent soil erosion along rivers.
La vegetación ribereña ayuda a prevenir la erosión del suelo a lo largo de los ríos.
C2 noun /ˈrɪvjʊlət/

rivulet

riachuelo
Meaning
a small stream of water; a tiny brook
Example
A rivulet ran down the hillside after the rain.
Un riachuelo bajó por la ladera después de la lluvia.
A2 verb /rɪˈlæks/

relax

relajarse
Meaning
to make or become less tense or anxious; to rest
Example
After a long day, she likes to relax with a good book.
Después de un largo día, le gusta relajarse con un buen libro.
C1 noun /rɪˈpen.təns/

Repentance

arrepentimiento
Meaning
the action of repenting; sincere regret or remorse
Example
His genuine repentance moved everyone in the courtroom.
Su arrepentimiento genuino conmovió a todos en la sala del tribunal.
C1 noun /rɪˈpjuːt/

repute

reputación
Meaning
the opinion generally held of someone or something; reputation
Example
He is a scholar of great repute in his field.
Él es un académico de gran reputación en su campo.
C1 noun /rɪˈvʌlʃən/

revulsion

repulsión
Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
Ella sintió repulsión al ver el acto cruel.
C1 adjective /rɪˈtɔːrɪkəl/

rhetorical

retórico
Meaning
relating to the art of effective or persuasive speaking or writing; often a question asked to make a point rather than get an answer
Example
He asked a rhetorical question during the debate.
Hizo una pregunta retórica durante el debate.
B2 adjective /rɪˈstrɪk.tɪd/

Restricted

limitado o controlado; sujeto a restricciones
Meaning
limited or controlled; subject to restrictions
Example
Access to this area is restricted to authorized personnel only.
El acceso a esta área está restringido solo a personal autorizado.
A1 noun ˈræbɪt

rabbit

conejo
Meaning
A small mammal with long ears, long hind legs, and a short tail
Example
The rabbit ran quickly into the forest.
El conejo corrió rápidamente hacia el bosque.
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.
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.
B1 adjective /rɪˈlɪdʒəs/

Religious

religioso; devoto; espiritual; relacionado con la religión;
Meaning
relating to or believing in a religion; devout; spiritual;
Example
He comes from a very religious family.
Él proviene de una familia muy religiosa.
A2 verb /rɪˈpiːt/

repeat

repetir
Meaning
to say or do something again
Example
Could you please repeat what you just said?
¿Puedes repetir lo que acabas de decir?
C1 verb /rɪˈvɜːrbəreɪt/

reverberate

reverberar
Meaning
To echo repeatedly or have continuing effects.
Example
The sound of the explosion reverberated through the valley.
El sonido de la explosión reverberó a través del valle.
C1 noun /ˌrek.ənˌsɪl.iˈeɪ.ʃən/

reconciliation

reconciliación
Meaning
The restoration of friendly relations; the action of making one view or belief compatible with another.
Example
The peace treaty was a major step toward reconciliation.
El tratado de paz fue un paso importante hacia la reconciliación.
B2 adjective /ˈruː.tɪd/

Rooted

arraigado
Meaning
deeply established; firmly fixed
Example
His beliefs are deeply rooted in tradition.
Sus creencias están profundamente arraigadas en la tradición.
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 adjective /rɪˈfaɪnd/

Refined

refinado; purificado
Meaning
elegant and cultured in appearance, manner, or taste; purified
Example
She has very refined taste in art and music.
Ella tiene un gusto muy refinado en arte y música.
B2 verb /rɪˈzɑlv/

resolve

resolver
Meaning
to solve a problem; to decide firmly
Example
The manager resolves the conflict between employees.
El gerente resuelve el conflicto entre los empleados.