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B1 adjective /rɪˈkwaɪəd/

required

Meaning
necessary or compulsory
Example
A visa is required to enter the country.
B2 noun /rɪˈmeɪnz/

remains

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.
B2 adjective /rɪˈzɜːrvd/

Reserved

Meaning
slow to reveal emotion or opinions; restrained in manner
Example
She is quite reserved and doesn't talk much in meetings.
B2 verb /rɪˈkɜːr/

recur

Meaning
to happen again, especially repeatedly or at regular intervals
Example
The headache tends to recur every few weeks.
C1 noun /ˈræftər/

rafter

Meaning
One of the sloping beams that supports a roof.
Example
The old barn’s rafters were exposed.
C1 verb /raɪl/

rile

Meaning
to irritate or annoy someone
Example
His careless comments really riled her.
B2 verb /rɪˈkʌvərɪŋ/

recovering

Meaning
the process of getting better after illness, loss, or difficulty
Example
She is still recovering from the flu.
C1 noun /roʊz ˈber.i/

Rose berry

Meaning
a type of berry with rose-like characteristics or flavor
Example
The rose berry has a delicate floral taste that reminds me of roses.
C1 adjective /ˈraɪtfəl/

rightful

Meaning
having a legitimate or just claim; proper or lawful
Example
She is the rightful owner of the property.
C1 noun /ˌriː.əˈdʒʌst.mənt/

readjustment

Meaning
The act of changing or correcting something again to make it suitable or balanced.
Example
After moving to a new city, he went through a period of readjustment.
B2 noun /ˌref.jʊˈdʒiː/

Refugee

Meaning
a person who has been forced to leave their country in order to escape war, persecution, or natural disaster
Example
The refugee camp provided temporary shelter for thousands of displaced families.
A2 verb /rɪŋ/

ring

Meaning
to make a clear sound like a bell; to call by telephone
Example
The bell rings every hour.
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.
B2 adjective /rɪˈstrɪk.tɪd/

Restricted

Meaning
limited or controlled; subject to restrictions
Example
Access to this area is restricted to authorized personnel only.
C1 noun /ˌrɛs.ɪˈprɒs.ɪ.ti/

reciprocity

Meaning
The practice of exchanging things with others for mutual benefit.
Example
Business relationships thrive on reciprocity.
C1 adverb /ˈrɪdʒɪdli/

Rigidly

Meaning
in a strict, inflexible manner; without compromise
Example
The rules are rigidly enforced in this institution.
B1 verb /rɪˈkʌvər/

recover

Meaning
To return to a normal state of health, mind, or strength; to regain or save something.
Example
The world is struggling to recover from the pandemic.
C1 noun /rɪˈpjuːt/

repute

Meaning
the opinion generally held of someone or something; reputation
Example
He is a scholar of great repute in his field.
B2 verb /reɪp/

rape

Meaning
to force someone to have sexual intercourse without their consent
Example
The law strictly punishes those who commit rape.
C1 noun /ˈræp.tʃər/

rapture

Meaning
A feeling of intense joy, delight, or ecstasy.
Example
She listened to the music in rapture.
C1 noun ˈrez.ɪ.djuː

residue

Meaning
A small amount of something that remains after the main part has gone or been removed.
Example
Soap residue affects appliance efficiency.
C1 verb /raʊz/

rouse

Meaning
To awaken from sleep or to stir into action.
Example
The loud alarm roused him from his deep sleep.
B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

Meaning
Strengthening or supporting something, especially behavior or learning.
Example
Positive reinforcement helps in learning.
B2 noun /ˈrɪə.lɪ.zəm/

realism

Meaning
The quality of representing things as they are; a practical or factual view.
Example
Her paintings are admired for their realism.
C1 noun /ˌrɛfəˈrɛndəm/

referendum

Meaning
a general vote by the population on a single political issue
Example
The government held a referendum on the new constitution.
B2 verb /ræm/

ram

Meaning
to strike or push something with great force
Example
The truck rammed into the wall.
C1 noun /ˌrɛmɪˈnɪsəns/

reminiscence

Meaning
a story or memory about past events
Example
He shared a reminiscence of his childhood days in the village.
B1 noun /rɪˈleɪ.ʃən/

Relation

Meaning
the way in which two or more people or things are connected; a family member
Example
They have a strong business relation that has lasted for years.
C1 noun /rɛnˈdɪʃən/

rendition

Meaning
a performance or interpretation of a piece of art, music, or text
Example
The singer gave a moving rendition of the classic song.
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.
C2 adjective /ˈreə.rɪ.faɪd/

rarefied

Meaning
Of high moral, intellectual, or cultural value; distant from ordinary life.
Example
He works in the rarefied world of classical music.
A2 noun ˈrɛlətɪvz

Relatives

Meaning
A person connected by blood or marriage; a kinsman or kinswoman.
Example
Relatives can help you build a complete family tree.
C1 verb /ˈrɪvɪt/

rivet

Meaning
to fasten or secure with a rivet; to hold someone’s attention firmly
Example
The craftsman riveted the metal plates together.
B2 adjective /rɪˈspɒn.sɪv/

Responsive

Meaning
reacting quickly and positively; readily reacting to suggestions or changes
Example
The website is very responsive and loads quickly on all devices.
C1 verb /riːl/

reel

Meaning
to lose balance and stagger; to wind or spin something onto a reel
Example
He reeled backward after being punched.
C1 noun /ˌrɛtrɪˈbjuːʃən/

retribution

Meaning
punishment inflicted as vengeance for a wrong or crime
Example
The villagers demanded retribution for the crime committed.
C1 noun /rɪˈliːf treɪn/

Relief Train

Meaning
a train that carries emergency supplies and aid to disaster-affected areas
Example
The relief train arrived with food and medical supplies for the flood victims.
C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
A2 noun /ˈrɛkɔːd/

record

Meaning
a written or spoken account of something
Example
I kept a record of all the meetings.
B1 noun /rɪˈsɜːtʃə(r)/

researcher

Meaning
a person who conducts research
Example
The researcher published her findings in a scientific journal.
C1 verb /rɪˈtreɪs/

retrace

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.
C1 adjective /rɪˈdʌn.dənt/

redundant

Meaning
Not or no longer needed or useful; superfluous.
Example
The report contained redundant information.
C2 noun /ræpˈskæliən/

rapscallion

Meaning
A mischievous or cheeky person; a rascal.
Example
The little rapscallion hid his brother’s shoes as a prank.
C2 adjective /rəˈpeɪ.ʃəs/

rapacious

Meaning
having an extreme desire to take things for oneself, greedy
Example
The rapacious landlord raised the rent without reason.
B2 noun ˈrɛvənuː

revenue

Meaning
Income, especially when of a company or organization.
Example
The company's revenue grew by 10% this year.
C2 noun /ˈrɪvjʊlət/

rivulet

Meaning
a small stream of water; a tiny brook
Example
A rivulet ran down the hillside after the rain.
B2 verb /rɪˈfreɪn/

refrain

Meaning
To hold oneself back from doing something.
Example
Please refrain from smoking in this area.
C1 adjective /rɪˈstreɪnd/

restrained

Meaning
characterized by reserve or self-control; held back
Example
Her restrained reaction surprised everyone.
B2 adjective /ˈrændəm/

Random

Meaning
without pattern or predetermined order; happening by chance
Example
She selected a random book from the library shelf.
C1 verb /rɪˈtɑːrd/

retard

Meaning
to delay or slow down the progress of something
Example
Lack of funds may retard the development of the project.
B2 adjective /ˈreɪsɪst/

racist

Meaning
showing or feeling discrimination or prejudice against people of other races
Example
He was accused of making racist comments.
B2 noun /rɪˈfreʃ.mənt/

Refreshment

Meaning
food and drink that is served as a light meal; something that refreshes
Example
We served light refreshments after the meeting.
B2 noun /ˈraɪvəl/

Rival

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.
C1 noun /rɪˈmɪʃən/

remission

Meaning
A temporary or permanent decrease or disappearance of disease symptoms; forgiveness of sins or debts.
Example
The patient’s cancer is in remission after the treatment.
C2 noun /rʌmp/

Rump

Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
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.
C2 noun /rɪˌdʒuːvəˈnɛsəns/

rejuvenescence

Meaning
the action or process of becoming young or fresh again
Example
The forest showed signs of rejuvenescence after the rains.
B2 noun /ˈreɪ.dɑːr/

Radar

Meaning
a system for detecting the presence, direction, distance of aircraft, ships by sending out radio waves
Example
The radar detected an unknown aircraft approaching the base.
B1 verb /rɪˈtaɪə/

retire

Meaning
to stop working after reaching a certain age or having completed a career
Example
She decided to retire after working for 40 years.
B2 noun ˌriːfɔːˈreɪʃən

reforestation

Meaning
The natural or intentional restocking of existing forests and woodlands that have been depleted.
Example
Reforestation efforts are crucial to restoring ecosystems.
C1 adjective /ˈræɡ.ɪd/

Ragged

Meaning
torn; tattered; frayed; shabby
Example
The homeless man wore ragged clothes.
C1 noun /rɪˈpreʃən/

Repression

Meaning
the action of subduing someone or something by force; the restraint, prevention, or inhibition of a feeling, impulse, etc.
Example
The government's repression of free speech sparked widespread protests.
C1 noun /ˈrɒstrəm/

rostrum

Meaning
A raised platform for speakers, performers, or leaders.
Example
The politician delivered a speech from the rostrum.
C1 verb /rɪˈklaɪn/

recline

Meaning
To lean or lie back in a relaxed position.
Example
She reclined on the sofa with a book.
C1 verb /rænt/

rant

Meaning
to speak or shout in an angry, uncontrolled way
Example
He ranted about the unfair treatment at work.
C1 noun /ˌrev.əˈluː.ʃən.ər.i ˈbreɪk.θruː/

revolutionary breakthrough

Meaning
A sudden, dramatic, and important discovery or development that changes everything.
Example
Robotic surgery is a revolutionary breakthrough in healthcare.
C1 adjective rɪˈsɛʃ.ən.er.i

recessionary

Meaning
Relating to or characterized by economic recession.
Example
Governments introduce policies to counter recessionary effects.
A2 adjective /riːl/

Real

Meaning
actually existing; genuine; not imaginary or fake
Example
This is a real diamond, not a fake one.
B2 noun /ˈreb.əl/

Rebel

Meaning
a person who resists authority or control
Example
The young rebel refused to follow the school rules.
A2 noun /ruːf/

roof

Meaning
the top covering of a building or vehicle
Example
The roof of the house needs to be repaired.
B2 noun /roʊst/

Roast

Meaning
Meat cooked by dry heat in an oven or over an open fire
Example
The Sunday roast was perfectly cooked and very tender.
B2 verb /ˈrɛkən/

reckon

Meaning
To think, believe, or expect something; to calculate or estimate.
Example
I reckon it will rain later today.
B1 noun /rɪˈɡret/

Regret

Meaning
a feeling of sadness or disappointment about something that has happened or been done
Example
She felt deep regret about her harsh words.
B2 adjective ˌrev.əˈluː.ʃən.ər.i

revolutionary

Meaning
Involving or causing a complete or dramatic change.
Example
Revolutionary ideas are reshaping the industry.
C2 adjective /ˈruːnɪk/

runic

Meaning
relating to or consisting of runes; mysterious or magical
Example
The old stone had strange runic carvings on it.
C2 noun /ˈræpsədi/

rhapsody

Meaning
an expression of great enthusiasm or an epic musical composition
Example
The singer’s performance was a rhapsody of emotions.
B2 noun /ˌriːprəˈdʌkʃən/

reproduction

Meaning
The process of producing offspring; the act of copying or duplicating.
Example
The textbook included a detailed diagram of human reproduction.
B1 noun /rɪˈspɒns/

Response

Meaning
a reaction to something; an answer or reply; the way in which something reacts to external stimulus
Example
The government's response to the crisis was swift and decisive.
B2 noun /ˈrest.ləs.nəs/

Restlessness

Meaning
the inability to rest or relax as a result of anxiety or boredom
Example
His restlessness during the long meeting was obvious to everyone.
C2 noun /raɪm/

rime

Meaning
frost formed on cold surfaces by freezing water vapor
Example
The trees were covered with a white rime after the cold night.
B2 noun/adjective /rɪˈpʌblɪkən/

republican

Meaning
a member or supporter of a republican political party or system
Example
The republican candidate won the election.
C1 noun/verb /ˈræfəl/

raffle

Meaning
A means of raising money by selling numbered tickets, one or more of which are drawn at random for a prize; to sell something in such a lottery.
Example
The charity decided to raffle a bicycle to raise funds.
C2 noun /ˈreɪdɪks/

radix

Meaning
the base or root of something; the number on which a system of numeration is built
Example
In mathematics, the decimal system has a radix of ten.
B1 verb /rɪˈvaɪz/

revise

Meaning
To change, improve, or update something, especially a written work.
Example
She had to revise her essay before submission.
C2 noun /ˈræɡəmʌfɪn/

ragamuffin

Meaning
A person, typically a child, in ragged, dirty clothes.
Example
The little ragamuffin begged for food on the street.
C1 noun /ˈredʒ.ɪ.mən/

regimen

Meaning
A prescribed course of medical treatment, way of life, or diet for the promotion or restoration of health.
Example
A strict exercise regimen improves overall fitness.
C1 adjective /rɪˈvɜː.sə.bəl/

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.
C2 noun /ˈrɛk.tɪ.tjuːd/

rectitude

Meaning
Morally correct behavior or thinking; righteousness and integrity.
Example
His rectitude earned him respect in society.
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 /rɪˈdʒɔɪndər/

rejoinder

Meaning
a quick or witty reply; a response to a remark or argument
Example
His sharp rejoinder silenced the crowd.
B2 verb /ˈræm.bəl/

ramble

Meaning
to talk or write at length in a confused or inconsequential way; to walk for pleasure without a fixed route.
Example
He rambled on about his childhood for hours.
C1 verb /rɪˈsɪprəˌkeɪt/

reciprocate

Meaning
To respond to an action or gesture by making a corresponding one.
Example
She smiled at him, and he reciprocated with a warm hug.
C1 noun /ˌrætɪfɪˈkeɪʃən/

Ratification

Meaning
the action of signing or giving formal consent to a treaty, contract, or agreement
Example
The treaty required ratification by both countries' parliaments.
C1 noun /rɪˈvʌlʃən/

revulsion

Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
B2 noun /ˈrɒbər/

robber

Meaning
a person who steals property from others, often using force or threat
Example
The robber was caught after a quick police chase.
C2 noun /rɪˈvaɪlər/

reviler

Meaning
a person who criticizes or insults others abusively
Example
He was known as a reviler of all who opposed him.
A2 noun /roʊz/

Rose

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.
C1 noun /ˌrɛkwɪˈzɪʃən/

requisition

Meaning
An official order laying claim to the use of property or materials; a formal demand or request.
Example
The manager submitted a requisition for new office supplies.
C1 noun /ˌrɛspɪˈreɪʃən/

respiration

Meaning
The process of breathing or the exchange of gases in living organisms.
Example
Respiration is essential for all living beings.
A2 noun /ruːl/

rule

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.
C1 noun ˌrev.əˈluː.ʃən.ər.i ɪˈnɪʃ.ə.tɪv

revolutionary initiative

Meaning
A groundbreaking action or plan that brings about significant change or transformation.
Example
The revolutionary initiative promotes sustainable energy.
C2 verb /rɪˈsɪnd/

rescind

Meaning
to revoke, cancel, or repeal a law, order, or agreement
Example
The company decided to rescind the job offer.
B2 noun /ˈreɪsɪzəm/

racism

Meaning
the belief that some races are superior to others, leading to unfair treatment or prejudice
Example
The organization works to eliminate racism in all forms.
A2 verb /ˈrɛkəɡnaɪz/

recognize

Meaning
To identify someone or something seen before; to acknowledge or accept.
Example
She did not recognize him in the crowd.
C2 verb /ˈrævəl/

ravel

Meaning
to tangle or complicate; to untangle or unravel depending on context
Example
She began to ravel the loose threads of the sweater.
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.
B1 noun /rɪˈliːf/

Relief

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.
C2 noun /rɪˈkwaɪtəl/

requital

Meaning
The act of returning something, such as a favor, service, or punishment; repayment or retaliation.
Example
She offered her time in requital for his kindness.
B1 verb /rɪˈvjuː/

review

Meaning
to examine or assess something again; to write a critical evaluation
Example
I need to review my notes before the exam.
C2 adjective /rɪˈprɛsəbl̩/

repressible

Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
B2 adverb /ˈræp.ɪd.li/

Rapidly

Meaning
at a fast speed; quickly
Example
The company is rapidly expanding into new markets.
C1 adjective /rɪˈsɔːrs ɪˈfɪʃ.ənt/

resource-efficient

Meaning
Using resources in a way that minimizes waste and maximizes productivity.
Example
Resource-efficient farming conserves water and energy.
A2 noun /roʊl/

role

Meaning
a part or function of something
Example
Her role in the project was crucial.
B1 noun /rɪˈfjuːz/

Refuse

Meaning
waste material; garbage; to decline or reject something
Example
Please put the refuse in the designated bins.
C1 adjective /ˈrɛzənənt/

resonant

Meaning
Deep, clear, and continuing to sound or echo.
Example
The resonant voice of the speaker filled the hall.
B1 noun /rɪˈsɔːrs/

resource

Meaning
A supply of materials, money, or assets that can be used when needed.
Example
Water is a vital natural resource.
C1 noun /ˈrɑːstər/

roster

Meaning
A list or plan showing people’s duties or times when they are scheduled.
Example
The manager updated the staff roster for next week.
B1 adjective /ˈriː.zən.ə.bəl/

Reasonable

Meaning
fair and sensible; not too expensive; logical and practical
Example
The hotel offers reasonable prices for quality accommodation.
B1 noun /ˌrɛzəˈluːʃən/

resolution

Meaning
The action of solving a problem, dispute, or contentious matter.
Example
The resolution of the issue requires careful planning and action.
B2 noun /rɪˈmuː.vəl/

Removal

Meaning
the action of taking something away or eliminating it; dismissal from office
Example
The removal of the old furniture took all day.
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.