refractory
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C2 adjective /rɪˈfræktəri/

refractory

Meaning
Stubborn or resistant to control, authority, or treatment.
Example
The refractory child refused to follow the teacher's instructions.
C1 adjective /ˌret.rəˈspek.tɪv/

Retrospective

Meaning
looking back on or dealing with past events or situations
Example
The museum held a retrospective exhibition of the artist's work.
C1 verb /riˈɪtəreɪt/

reiterate

Meaning
To say something again or repeatedly for emphasis or clarity.
Example
The teacher reiterated the importance of honesty.
A2 noun /ˈrʌnɪŋ/

running

Meaning
the action or sport of running
Example
Running every morning keeps me healthy.
C2 adjective /rɪˈfɛrəbəl/

referable

Meaning
able to be related or directed to something
Example
The issue is referable to the new policy changes.
C2 verb /rɪˈspaɪər/

respire

Meaning
To breathe in and out; to inhale and exhale.
Example
Plants also respire to release energy.
C1 noun /rɪˈkɜr.əns/

Recurrence

Meaning
the fact of something happening again; an instance of something happening again
Example
The doctor was concerned about the recurrence of the patient's symptoms.
B2 verb /rɪˈzɜːv/

reserve

Meaning
to keep something for future use; to book in advance
Example
I want to reserve a table for dinner.
B2 noun /rɪˈsiː.vər/

Receiver

Meaning
a person or thing that receives something; the part of a telephone containing the earpiece and mouthpiece
Example
She picked up the receiver to answer the phone call.
B2 adjective /ræʃ/

rash

Meaning
Acting quickly without careful consideration; reckless.
Example
It was a rash decision to invest without research.
C1 noun /ˈrɛ.trəʊ.fɪt.ɪŋ/

retrofitting

Meaning
The addition of new technology or features to older systems.
Example
The building underwent retrofitting to meet new safety standards.
C1 noun /ˈrɛspɪt/

respite

Meaning
A short period of rest or relief from something difficult or unpleasant.
Example
The weekend provided a welcome respite from work.
C2 adjective rɪˈtɛn.tɪv

retentive

Meaning
Having strong memory or the ability to retain information for a long time.
Example
Students with a retentive memory excel in academics.
C1 noun /ˈrɛdʒɪmənt/

regiment

Meaning
A permanent unit of an army, typically commanded by a colonel and divided into several companies.
Example
The regiment marched proudly through the streets after returning from the mission.
C1 noun /ˈrɛz.ə.nəns/

resonance

Meaning
A deep, reverberating sound or a quality of evoking response.
Example
His speech had a deep resonance with the audience.
C2 adjective /ˈræŋ.kər.əs/

rancorous

Meaning
Characterized by bitterness or resentment.
Example
Their rancorous debate lasted for hours.
B2 noun /ˈruːdnəs/

Rudeness

Meaning
the quality of being impolite, discourteous, or offensive in behavior or speech
Example
His rudeness shocked everyone at the dinner party.
A2 verb /rɪˈpleɪs/

replace

Meaning
to take the place of something or someone; to put something new in place of something old
Example
He decided to replace the broken lamp with a new one.
C1 noun ˈrəʊvə

rover

Meaning
A vehicle for driving over rough terrain, especially one driven by remote control over extraterrestrial terrain.
Example
The rover landed on Mars to begin its exploration.
C2 verb /rɪˈsɪnd/

rescind

Meaning
to revoke, cancel, or repeal a law, order, or agreement
Example
The company decided to rescind the job offer.
A1 noun, verb /rɛst/

rest

Meaning
to cease work or movement in order to relax or recover strength
Example
He needs to rest after the long journey.
A2 noun /roʊl/

role

Meaning
a part or function of something
Example
Her role in the project was crucial.
C1 adjective /ˌruː.dɪˈmen.tər.i/

Rudimentary

Meaning
basic; elementary; undeveloped; in the earliest stage of development
Example
She has only rudimentary knowledge of French.
C1 adjective rɪˈsɛʃ.ən.er.i

recessionary

Meaning
Relating to or characterized by economic recession.
Example
Governments introduce policies to counter recessionary effects.
B2 noun /ˈruːmər/

rumor

Meaning
a currently circulating story or report of uncertain or doubtful truth.
Example
There’s a rumor that the company will merge next year.
B1 adjective /ˌriːəˈlɪstɪk/

realistic

Meaning
having or showing a sensible and practical idea of what can be achieved or expected
Example
She gave a realistic estimate of the project's cost.
C1 adjective /rɪˈvoʊltɪŋ/

revolting

Meaning
extremely unpleasant or disgusting
Example
The smell of the garbage was revolting.
C1 verb /ˌriːˈmɒdəl/

remodel

Meaning
To change the structure or form of something, especially a building.
Example
They decided to remodel their kitchen last summer.
B2 verb /roʊm/

roam

Meaning
to walk or travel without a specific destination; to wander
Example
Wild animals roam freely in the forest.
C1 noun /ˌrek.ənˌsɪl.iˈeɪ.ʃən/

reconciliation

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.
B2 adjective /rɪˈspek.tɪv/

Respective

Meaning
belonging to each individual; particular to each
Example
The students returned to their respective classrooms after lunch.
C1 adjective /ˈrɪvɪtɪŋ/

riveting

Meaning
extremely interesting; holding the complete attention
Example
The movie was so riveting that nobody looked away.
C2 noun /ruːˈeɪ/

roue

Meaning
A man devoted to a life of sensual pleasure; a debauched man.
Example
The old roue squandered his fortune on gambling and women.
A2 verb /reɪz/

raise

Meaning
To lift or move something to a higher position; to increase; to bring up.
Example
She raised her hand to ask a question.
C1 adjective /ˈroʊ.ɡɪʃ/

Roguish

Meaning
mischievous; playfully dishonest
Example
His roguish smile suggested he was up to some mischief.
C2 noun /ˈræbəl/

Rabble

Meaning
a disorderly crowd; the common people regarded as socially inferior
Example
The politician dismissed the protesters as mere rabble.
B2 noun, verb /ræmp/

ramp

Meaning
a sloping surface joining two different levels; as a verb, to increase or rise sharply
Example
The car drove up the ramp into the parking garage.
B1 adverb /ˈriː.zən.ə.bli/

Reasonably

Meaning
in a sensible way; fairly; to a moderate degree
Example
The hotel room was reasonably priced for the location.
C1 verb /rɪˈlɛnt/

relent

Meaning
to become less severe, harsh, or strict
Example
After hours of begging, she finally relented.
B2 verb /rɪˈliːv/

relieve

Meaning
to make pain, distress, or difficulty less severe or serious
Example
The medicine helped relieve his headache.
C2 noun /ˈrɛkjʊzənt/

recusant

Meaning
a person who refuses to submit to authority or comply with rules
Example
The recusant opposed the new law.
C2 adjective /rəˈʃɛrʃ/

recherche

Meaning
Rare, exotic, or obscure, often in a sophisticated or refined way.
Example
The gallery displayed many recherche artworks from unknown artists.
A1 noun, adjective, adverb /raɪt/

right

Meaning
something that is morally good, fair, or just; or a legal/entitled claim
Example
Everyone has the right to free speech.
C2 verb /rɪˈfrækt/

refract

Meaning
To bend light, sound, or heat as it passes through a medium.
Example
The water refracts light, making the straw look bent.
B1 noun rɪˌspɒnsəˈbɪlɪti

responsibility

Meaning
The state or fact of having a duty to deal with something or of having control over someone.
Example
Taking responsibility for one's actions is a sign of maturity.
C1 verb rɪˈplɛn.ɪʃ

replenish

Meaning
Fill something up again.
Example
Drinking water helps replenish lost fluids in the body.
C2 noun /rɪˈpruːf/

reproof

Meaning
An expression of blame or disapproval.
Example
His careless words drew a sharp reproof from his mother.
B2 noun /roʊˈteɪʃən/

Rotation

Meaning
the action of rotating around an axis or center; a single turn
Example
The Earth's rotation takes 24 hours to complete.
B2 noun /rɪˈsɛs/

recess

Meaning
A short break from work or school; also a small space set back in a wall.
Example
The children played outside during recess.
C2 adjective /rɪˈsplɛndənt/

resplendent

Meaning
Shining brilliantly; dazzling in appearance or effect
Example
The bride looked resplendent in her wedding gown.
B1 adjective ˈriː.dʒən.əl

regional

Meaning
Relating to or characteristic of a region.
Example
Regional hubs support localized industries.
B2 verb rɪˈzaɪn

resign

Meaning
Voluntarily leave a job or other position.
Example
Ministers were forced to resign.
C2 adjective /ˈrɛɡnənt/

regnant

Meaning
Reigning; currently holding power, authority, or dominance.
Example
The regnant queen introduced several reforms during her reign.
B2 verb /ˌriː.kənˈsɪd.ər/

reconsider

Meaning
to think about something again, especially to change a decision or opinion
Example
She decided to reconsider her decision about moving abroad.
C1 noun /rɪˈspɒnsɪvnəs/

responsiveness

Meaning
The quality of reacting quickly and positively
Example
The manager appreciated her responsiveness to customer feedback.
C1 adjective /ˈrep.jə.tə.bəl/

Reputable

Meaning
having a good reputation; respected and trusted
Example
She works for a reputable law firm in the city.
B1 noun /ruːˈtiːn/

routine

Meaning
A sequence of actions regularly followed; a fixed program.
Example
A well-structured routine improves productivity.
C1 noun /ˈrɒndɪvuː/

rendezvous

Meaning
a meeting or appointment at an agreed time and place
Example
They arranged a secret rendezvous at the café.
C2 noun /ˈriːdʒənt/

regent

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.
C1 adjective /ˈraɪtfəl/

rightful

Meaning
having a legitimate or just claim; proper or lawful
Example
She is the rightful owner of the property.
B2 verb /rɪˈdʒɔɪs/

rejoice

Meaning
to feel or show great joy; to celebrate
Example
The family rejoices at the good news.
B1 adjective /rɪˈlɪdʒəs/

Religious

Meaning
relating to or believing in a religion; devout; spiritual;
Example
He comes from a very religious family.
C2 noun /ˌriːkəˌpɪtjʊˈleɪʃən/

recapitulation

Meaning
The act of summarizing or repeating the main points of something.
Example
The professor gave a brief recapitulation of the lecture before ending the class.
B2 adjective /ˈrɪdən/

ridden

Meaning
Full of or dominated by something unpleasant.
Example
The country was ridden with corruption.
C1 adjective /ˈræɡ.ɪd/

Ragged

Meaning
torn; tattered; frayed; shabby
Example
The homeless man wore ragged clothes.
A1 noun /reɪn/

Rain

Meaning
water that falls from clouds in small drops
Example
The heavy rain forced us to stay indoors.
C1 verb /rɪˈmɪt/

remit

Meaning
To send money in payment or as a gift; to cancel or refrain from exacting a debt or punishment.
Example
He promised to remit the payment by the end of the week.
C1 verb /ˈrɛplɪkeɪt/

replicate

Meaning
to copy, reproduce, or duplicate something exactly
Example
The scientist tried to replicate the experiment for accuracy.
C1 verb /rɪˈfjuːt/

refute

Meaning
To prove a statement, argument, or theory to be false or invalid.
Example
The lawyer refuted the witness's testimony with solid evidence.
A2 noun /ruːf/

roof

Meaning
the top covering of a building or vehicle
Example
The roof of the house needs to be repaired.
A2 noun /rɪˈlɪdʒ.ən/

religion

Meaning
a system of faith and worship involving belief in a higher power
Example
Freedom of religion is a fundamental human right.
B2 noun, verb /ˈriːteɪl/

retail

Meaning
the sale of goods to the public in small quantities for use or consumption rather than for resale
Example
The company specializes in the retail of clothing and accessories.
B2 verb /rɪˈfreʃ/

refresh

Meaning
to make fresh again; to restore energy
Example
A cold drink refreshes me on hot days.
C1 noun /rɪft/

rift

Meaning
a serious break in a relationship; a split or crack
Example
A rift developed between the two friends after the argument.
C2 verb /rɪˈkænt/

recant

Meaning
to withdraw or renounce a statement or belief formally
Example
He recanted his previous statement in court.
B2 verb /rɪˈsaɪt/

recite

Meaning
To say aloud something learned, especially poetry or text, from memory.
Example
The child recited a poem in front of the class.
C2 noun /ˈrʊkəri/

rookery

Meaning
a place where rooks or other birds breed and nest in colonies
Example
We saw a rookery full of noisy birds near the forest.
B1 verb /ˌrɛprɪˈzɛnt/

represent

Meaning
to act or speak on behalf of someone or something
Example
He will represent our company at the conference.
C1 noun /rɪˈnaʊn/

Renown

Meaning
the condition of being known or talked about by many people; fame
Example
The scientist achieved international renown for her discoveries.
C1 adjective /ˈræspi/

raspy

Meaning
having a harsh, rough, or grating sound
Example
His raspy voice revealed years of smoking.
C1 adjective rɪsk-ədˈʤɛstɪd

risk-adjusted

Meaning
Modified or calibrated to account for risk factors in investment returns.
Example
Risk-adjusted returns consider both potential profit and loss.
B2 noun /ˌren.əˈveɪ.ʃən/

Renovation

Meaning
the act of renovating; restoration to a former better state
Example
The old house underwent a complete renovation last year.
B2 verb /ˌriːprəˈdjuːs/

reproduce

Meaning
To make a copy of something; to generate offspring.
Example
Many animals reproduce rapidly in favorable conditions.
C1 noun /ˈroʊz ˈwɔː.tər/

Rose-water

Meaning
a flavored water made by steeping rose petals in water, used in cooking and cosmetics
Example
She added a few drops of rose-water to the dessert.
B2 noun rɪˈpʌb.lɪk

republic

Meaning
A state in which supreme power is held by the people and their elected representatives, with an elected or nominated president rather than a monarch.
Example
A republic is governed by representatives of the people.
A2 noun /ˈriː.zənz/

reasons

Meaning
Causes, explanations, or justifications for an action or event.
Example
Reasons for pollution need addressing urgently.
C1 verb /ˌrɛzəˈrɛkt/

resurrect

Meaning
To bring back to life or revive something from the past.
Example
The director decided to resurrect the old play for a new audience.
C1 adjective /rɪˈtæl.i.ə.tɔːr.i/

retaliatory

Meaning
Taking action in response to another's action, characterized as punitive, revengeful, or counteractive.
Example
The country imposed retaliatory tariffs in response to trade sanctions.
B2 noun /rɪˈvaɪ.vəl/

Revival

Meaning
an improvement in the condition or strength of something; renewed interest in or attention to something
Example
There has been a revival of interest in traditional crafts.
B1 verb /rʌb/

rub

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.
C2 adjective /ˈrævənɪŋ/

ravening

Meaning
Extremely hungry and greedy; voracious.
Example
The ravening wolves circled the camp.
C1 adjective /ˈrænsɪd/

rancid

Meaning
having a bad taste or smell due to being old or spoiled (especially fats or oils)
Example
The butter had gone rancid after being left out too long.
B1 noun /ˈrɪðəm/

rhythm

Meaning
a strong, regular, repeated pattern of movement or sound
Example
The rhythm of the music made everyone want to dance.
B1 noun rɪˈsɜː.tʃəz

researchers

Meaning
People who study and investigate to discover new information or facts.
Example
Researchers are working on innovative solutions.
C1 verb /rɪˈpʌls/

repulse

Meaning
to drive back an attack or attacker by force; to cause intense dislike or disgust
Example
The army managed to repulse the enemy attack.
C2 noun /rɪˈpæst/

repast

Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
B2 noun /ˈrɒbəɹi/

robbery

Meaning
the crime of stealing from someone or somewhere using force or threat
Example
The police are investigating the robbery at the local store.
B2 noun /rɪˈsɪp.i.ənt/

Recipient

Meaning
a person who receives something
Example
She was the recipient of the prestigious award.
B2 noun /ˌriː.əˈʃʊr.əns/

Reassurance

Meaning
comfort or confidence given to someone to remove their fears or doubts
Example
She needed reassurance that everything would be okay.
C1 noun /rʌsk/

Rusk

Meaning
a hard, dry biscuit or twice-baked bread; a type of crisp, sweet biscuit
Example
The baby enjoyed eating the soft rusk with milk.
B2 noun ˌreɪ.di.oʊ.ækˈtɪv.ə.ti

radioactivity

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.
B2 noun /ˌrɛfəˈriː/

referee

Meaning
a person who oversees a game or match to ensure the rules are followed
Example
The referee stopped the game after a foul.
A2 noun /rɪˈfrɪdʒ.ər.eɪ.tər/

Refrigerator

Meaning
an appliance for keeping food and drinks cold
Example
Please put the milk in the refrigerator to keep it fresh.
C2 adjective /ˈruːmi/

rheumy

Meaning
Watery, especially referring to the eyes.
Example
His rheumy eyes showed signs of age and fatigue.
C1 verb rɪˈlɪŋ.kwɪʃ

relinquish

Meaning
To give up any authority, responsibility, or property.
Example
He decided to relinquish his position as CEO.
A2 noun /reɪs/

race

Meaning
a competition of speed, or a group of people with similar characteristics
Example
The race was very exciting, with many competitors.
C1 noun/verb /ˈrɛprɪˌmænd/

reprimand

Meaning
A formal expression of disapproval; to scold or criticize someone officially.
Example
The teacher reprimanded the student for being late.
B1 adjective /ˈrɔɪ.əl/

Royal

Meaning
belonging to or connected with the monarch or monarchy; magnificent; excellent
Example
The royal family attended the ceremony.
C1 noun /rɪˈdʌn.dəns/

Redundance

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.
C2 adjective /ˈreɪ.moʊs/

ramose

Meaning
having many branches.
Example
The ramose tree shaded the entire garden.
C2 adjective /raɪˈpɛə.ri.ən/

riparian

Meaning
Relating to or situated on the banks of a river or other watercourse.
Example
Riparian vegetation helps prevent soil erosion along rivers.
C1 verb /rɪˈtɔːrt/

retort

Meaning
To reply quickly or sharply, often in a witty or angry manner.
Example
He quickly retorted that he was not to blame.
C1 noun /rɑk sɔlt/

Rock Salt

Meaning
natural salt crystals formed from evaporated ancient seas; unrefined salt
Example
Rock salt is considered healthier than table salt.
C2 noun /ˈræp.aɪn/

rapine

Meaning
the violent seizure of someone's property
Example
The war was marked by rapine and destruction.
B1 noun /rɪˈzɔː.sɪz/

resources

Meaning
A stock or supply of money, materials, staff, and other assets.
Example
The region was rich in herbal resources.
B2 adjective /ˈræʃ.ən.əl/

Rational

Meaning
based on reason and logic; sensible and practical
Example
She made a rational decision based on the available facts.
B2 verb /ˌriːəˈreɪndʒ/

rearrange

Meaning
to change the order or position of something
Example
She decided to rearrange the furniture in her living room.
A1 adjective /red/

Red

Meaning
having the color of blood or fire; of the color red
Example
She wore a beautiful red dress to the party.
A2 adverb /ˈrɛə(r)li/

rarely

Meaning
not often, infrequently
Example
She rarely eats sweets because of her diet.
B1 verb /ˈreskjuː/

rescue

Meaning
to save someone or something from danger or harm
Example
The firefighters rescued the cat from the tree.
C1 adjective /rɪˈsɪ.prə.kəl/

Reciprocal

Meaning
given or done in return; mutual; shared equally by both parties;
Example
The two countries have a reciprocal trade agreement.