residues
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C1 noun ˈrez.ɪ.djuːz

residues

Meaning
A small amount of something that remains after the main part has gone or been taken or used.
Example
The burning process leaves no harmful residues.
C1 adjective /rɪˈzɪdjuəl/

residual

Meaning
Remaining after the greater part has gone.
Example
The patient experienced residual pain after the surgery.
C1 verb /rɪˈnaʊns/

renounce

Meaning
to formally declare rejection of something, such as a claim, belief, or way of life
Example
She renounced her citizenship to move abroad permanently.
C1 adjective /ˈrɪkɪti/

rickety

Meaning
Poorly made and likely to collapse; shaky.
Example
They crossed a rickety wooden bridge over the river.
C1 adjective /rɪˈflek.sɪv/

Reflexive

Meaning
directed back on itself; showing deep thought about oneself
Example
She became more reflexive about her behavior after the feedback.
C1 noun /ˈrʌp.tʃər/

Rupture

Meaning
breaking or bursting apart; breakdown of relations
Example
The rupture in the pipeline caused a massive oil spill.
C1 noun /rɪˈbʌtəl/

rebuttal

Meaning
a statement or argument made to oppose or disprove another
Example
Her rebuttal was clear and convincing.
C1 adjective /rɪˈpɛlənt/

repellent

Meaning
Able to drive away something, especially insects or unpleasant things; causing disgust or distaste.
Example
This cream is highly effective as a mosquito repellent.
C1 adverb /ˈrɪdʒɪdli/

Rigidly

Meaning
in a strict, inflexible manner; without compromise
Example
The rules are rigidly enforced in this institution.
C1 verb /ˌriːˈkæst/

recast

Meaning
To present or change something in a different form or style.
Example
The director decided to recast the role with a younger actor.
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.
C1 adjective /rɪˈtɜː.nə.bəl/

Returnable

Meaning
able to be returned or given back
Example
The bottle is returnable for a deposit refund.
C1 noun /ˈrem.nənt/

Remnant

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.
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 /rɪˈvoʊltɪŋ/

revolting

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

recourse

Meaning
a source of help or protection in a difficult situation
Example
The students had no recourse but to appeal to the principal.
C1 noun ˈrɛp.ə.twɑːr

repertoire

Meaning
A stock of plays, dances, or pieces that a company or a performer knows or is prepared to perform.
Example
The actor's repertoire includes both comedy and drama.
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.
C1 noun/verb /rɪˈproʊtʃ/

reproach

Meaning
An expression of disapproval or disappointment; to criticize someone for doing wrong.
Example
She reproached him for arriving late to the meeting.
C1 verb /rɪˈbʌf/

rebuff

Meaning
to reject or refuse in a sharp or abrupt way
Example
She rebuffed his invitation to dinner.
C1 noun /rɪˈpɛərə/

repairer

Meaning
a person whose job is to fix damaged or broken things
Example
The repairer fixed the broken washing machine quickly.
C1 noun /ˈrɛzɪn/

resin

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.
C1 noun /ˈreɪdiəns/

radiance

Meaning
the quality of shining with bright light; a glowing or beaming quality
Example
Her face was filled with radiance after hearing the good news.
C1 noun /rɪˌsɛptɪˈvɪti/

receptivity

Meaning
The ability or willingness to receive something, especially signals or stimuli.
Example
Her receptivity to new ideas helped improve the project.
C1 noun /rɪˈvʌlʃən/

revulsion

Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
C1 noun /rɪˈtriː.vəl/

retrieval

Meaning
The process of getting something back, especially from storage or memory.
Example
The brain's retrieval system helps recall past experiences.
C1 noun rɪˈdɛmpʃən

redemption

Meaning
The action of saving or being saved from sin, error, or evil.
Example
The story highlights the theme of redemption.
C1 noun /rɪˈteɪnər/

retainer

Meaning
a fee paid in advance to secure someone's services, or a device that holds something in place
Example
The lawyer asked for a retainer before taking the case.
C1 noun /ˈroʊ.lɪŋ bɔːrd/

Rolling board

Meaning
a flat wooden or marble surface used for rolling out dough
Example
She placed the dough on the rolling board.
C1 noun /rɪˈmɔːrs/

Remorse

Meaning
deep regret or guilt for a wrong committed; bitter regret for something done
Example
He felt deep remorse for his actions.
C1 noun /ˈruː.bi/

Ruby

Meaning
a precious red gemstone; a deep red variety of corundum
Example
The ruby ring was her most treasured possession.
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 noun /ˈruːbrɪk/

rubric

Meaning
A set of instructions, rules, or a heading in a document, often used for grading criteria.
Example
The teacher provided a grading rubric for the assignment.
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.
C1 noun /rɪˈflɛktər/

reflector

Meaning
A surface or device that reflects light, heat, or sound, often used to direct beams or improve visibility.
Example
The cyclist attached a red reflector to the back of his bike for safety.
C1 adjective /ˈraʊ.di/

Rowdy

Meaning
disorderly; unruly; noisy and disruptive
Example
The rowdy children were making too much noise.
C1 noun /ˈrɪdəns/

riddance

Meaning
The action of getting rid of something unwanted or unpleasant.
Example
His departure was considered a welcome riddance by the team.
C1 adjective /rɪˈmiːdiəl/

Remedial

Meaning
intended as a remedy; corrective; providing a cure;
Example
The students need remedial classes to improve their math skills.
C1 verb /rɪɡ/

rig

Meaning
to manipulate or control something dishonestly; to set up equipment
Example
The election was rigged by corrupt officials.
C1 noun /ˌriːhəˌbɪlɪˈteɪʃən/

rehabilitation

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.
C1 adjective /rɪˈstreɪnd/

restrained

Meaning
characterized by reserve or self-control; held back
Example
Her restrained reaction surprised everyone.
C1 noun /ˈrɛɡjəleɪtər/

regulator

Meaning
a person or device that controls or maintains the operation of a system
Example
The government appointed a new regulator for the financial sector.
C1 noun/verb /rɪˈpriːv/

reprieve

Meaning
A temporary relief or delay from something unpleasant; to postpone or cancel punishment.
Example
The prisoner was granted a last-minute reprieve from execution.
C1 adjective /riˈækʃəˌneri/

reactionary

Meaning
Opposing political or social progress or reform; extremely conservative.
Example
The group took a reactionary stance against the new policies.
C1 noun /rʌk/

Ruck

Meaning
a situation where a crowd of people are pushing against each other; a disorderly crowd
Example
There was a ruck at the football match.
C1 noun /rɪˈsaɪtər/

reciter

Meaning
a person who recites or repeats something aloud from memory, especially poetry, prayers, or formal texts
Example
The reciter delivered the poem with clarity and emotion.
C1 noun /rɪˌdʒuːvəˈneɪʃən/

rejuvenation

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.
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 /ˈrʌfiən/

Ruffian

Meaning
a violent person, especially one involved in crime; a brutal or lawless person
Example
The ruffian threatened the shopkeeper for money.
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 /ˈreɪ.vən/

Raven

Meaning
a large, black bird with a thick bill and harsh croaking voice
Example
The raven perched on the old oak tree and cawed loudly.
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.
C1 noun /ˈrɛpərˌtɔːri/

repertory

Meaning
A collection of works that a company, performer, or institution regularly performs; also a storehouse of information or skills.
Example
The theater has a repertory of classic plays.
C1 noun /roʊt/

rote

Meaning
mechanical or habitual repetition, often without understanding
Example
He learned the poem by rote without understanding its meaning.
C1 verb /rɪˈbjuːk/

rebuke

Meaning
to criticize or scold sharply; to express disapproval
Example
The teacher had to rebuke the student for cheating.
C1 adjective /ræpt/

Rapt

Meaning
completely fascinated or absorbed by what one is seeing or hearing
Example
The children listened with rapt attention to the storyteller.
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 /ˈrʌmpəs/

Rumpus

Meaning
a noisy disturbance; an uproar or commotion
Example
The children caused quite a rumpus in the playground.
C1 adjective /ˈreɪ.kɪʃ/

Rakish

Meaning
having a dashing, jaunty, or slightly disreputable quality or appearance
Example
He wore his hat at a rakish angle that gave him a charming appearance.
C1 verb /rɪˈnɛɡ/

renege

Meaning
to go back on a promise, agreement, or commitment
Example
The company reneged on its promise to increase wages.
C1 adjective /ˈrɛtroʊˌɡreɪd/

retrograde

Meaning
moving backward or returning to a worse condition
Example
The policy was seen as a retrograde step for human rights.
C1 noun /ræmˈbuːtən/

Rambutan

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.
C1 adjective /rɪˈpen.tənt/

Repentant

Meaning
feeling or expressing sincere regret and remorse; sorry for one's actions
Example
The repentant thief returned the stolen money.
C1 adjective /ˈrɔːkəs/

raucous

Meaning
loud, harsh, and unpleasant sound or behavior
Example
The crowd became raucous after the team scored.
C1 adjective /ˈrɛzənənt/

resonant

Meaning
Deep, clear, and continuing to sound or echo.
Example
The resonant voice of the speaker filled the hall.
C1 adjective /ˈrez.ə.luːt/

Resolute

Meaning
determined; having a firm decision; unwavering
Example
She remained resolute in her decision to pursue her dreams.
C1 noun /ˌrɛfjʊˈteɪʃən/

refutation

Meaning
The act of proving a statement or argument to be false or incorrect.
Example
Her essay was a strong refutation of the opposing theory.
C1 verb /raɪl/

rile

Meaning
to irritate or annoy someone
Example
His careless comments really riled her.
C1 adjective /ˈreɪ.si/

racy

Meaning
Lively, entertaining, or slightly shocking (especially in a sexual way).
Example
The novel was full of racy dialogues.
C1 verb /rɪˈlɛnt/

relent

Meaning
to become less severe, harsh, or strict
Example
After hours of begging, she finally relented.
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.
C1 verb /rɪˈdiːm/

redeem

Meaning
to compensate for faults or mistakes; to exchange something for value
Example
He managed to redeem his reputation after the scandal.
C1 noun ˌræʃ.ən.əl.ɪˈzeɪ.ʃən

rationalization

Meaning
The practice of finding reasons for behavior or actions that are not the real reasons.
Example
His rationalization of the mistake was not convincing.
C1 verb /ˈræʃənaɪz/

rationlize

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.
C1 verb /rɪˈprɛs/

repress

Meaning
To restrain, suppress, or keep under control, especially emotions or desires.
Example
He tried to repress his anger during the meeting.
C1 verb /ˌriːˈvaɪ.t̬əl.aɪz/

revitalize

Meaning
To restore energy and effectiveness to something.
Example
The new policies aim to revitalize the economy.
C1 noun /ˈrɪpəl/

Ripple

Meaning
a small wave on the surface of water; a spreading effect or influence
Example
The stone created ripples across the calm pond.
C1 noun /ˈrɛl.ɪk/

relic

Meaning
an object surviving from an earlier time, often of historical or religious interest
Example
The museum displayed relics from the ancient civilization.
C1 verb /rɪˈpiːl/

repeal

Meaning
To officially cancel or revoke a law or decision.
Example
The government decided to repeal the outdated law.
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.
C1 noun /ˈrɪɡər/

rigor

Meaning
strictness, severity, or demanding conditions
Example
The training was carried out with great rigor.
C1 verb /rɪˈsʌsɪteɪt/

resuscitate

Meaning
to revive someone from unconsciousness or apparent death
Example
The doctors tried to resuscitate the patient after the heart attack.
C1 verb /ˈrævɪdʒ/

ravage

Meaning
to cause severe and extensive damage or destruction
Example
The hurricane ravaged the coastal villages.
C1 verb /ˈrɛzəneɪt/

resonate

Meaning
To produce or be filled with a deep, full, and reverberating sound; to evoke a feeling or memory.
Example
Her words resonated with the audience.
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 adjective /ˈræmʃækəl/

ramshackle

Meaning
poorly built or maintained; in a state of disrepair
Example
They lived in a ramshackle old house on the edge of town.
C1 adjective /rɪˈper.ə.bəl/

Repairable

Meaning
able to be fixed or mended; capable of being repaired
Example
The broken phone is repairable with the right parts.
C1 verb /ˌriː.kənˈviːn/

reconvene

Meaning
to gather or assemble again, especially for a meeting
Example
The committee will reconvene after lunch.
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.
C1 noun /rɪˈdʒɪdəti/

Rigidity

Meaning
inability to bend or be forced out of shape; unwillingness to change or compromise
Example
The rigidity of the old system prevented any innovation.
C1 noun /rɪˈdʒɔɪsɪŋ/

rejoicing

Meaning
The action of showing great joy or happiness
Example
There was much rejoicing after the victory.
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.
C1 noun /ˌræm.ɪ.fɪˈkeɪ.ʃən/

ramification

Meaning
a consequence of an action or event, often complex or unwelcome.
Example
The new law has serious social ramifications.
C1 adjective /ˈrʌɡ.ɪd/

Rugged

Meaning
rough and uneven; having a rough irregular surface; tough and strong
Example
The hikers crossed the rugged mountain terrain.
C1 verb /rɪˈkuːpəreɪt/

recuperate

Meaning
to recover from illness or regain strength
Example
She went to the countryside to recuperate after surgery.
C1 verb /ˈrʌm.ɪdʒ/

rummage

Meaning
to search through something in a disorderly way
Example
He rummaged through the drawer for his keys.
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.
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.
C1 adjective /rɪˈtɔːrɪkəl/

rhetorical

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.
C1 adjective /ˌrɛprɪˈhɛnsəbl̩/

reprehensible

Meaning
Deserving strong criticism or blame.
Example
His dishonest actions were truly reprehensible.
C1 adjective /ˈroʊ.ɡɪʃ/

Roguish

Meaning
mischievous; playfully dishonest
Example
His roguish smile suggested he was up to some mischief.
C1 noun /rəˈpɪdəti/

rapidity

Meaning
The quality of moving or happening quickly; swiftness or speed.
Example
The rapidity of technological change is astonishing.
C1 noun /ˈrɛnɪˌɡeɪd/

renegade

Meaning
a person who deserts or betrays an organization, country, or principles
Example
He was labeled a renegade after leaving the party and criticizing its policies.
C1 noun /raɪt/

rite

Meaning
a religious or ceremonial act
Example
The wedding rite was performed with great solemnity.
C1 noun /ˈrəʊ.bɒt əˈsɪs.tɪd prəˈsiː.dʒərz/

robot-assisted procedures

Meaning
Medical operations performed with the help of robotic systems to enhance precision and control.
Example
Robot-assisted procedures reduce human error.
C1 verb /ˈreɪdieɪt/

radiate

Meaning
to emit energy or light; to spread out from a center
Example
The fireplace radiates warmth throughout the room.
C1 verb /rɪˈdrɛs/

redress

Meaning
to set right, remedy, or compensate for a wrong or grievance
Example
The company promised to redress the complaints of its customers.
C1 verb /ˈræn.də.maɪz/

randomize

Meaning
To make something happen in a random order or manner.
Example
The software can randomize the order of questions.
C1 verb /ˌriːˈsiːt/

reseat

Meaning
to seat someone again or to fit something back into its place
Example
The usher had to reseat the guests after the interruption.
C1 adjective /ˈrʌs.tɪk/

Rustic

Meaning
simple and unsophisticated; relating to rural areas
Example
The rustic cottage had wooden beams and a thatched roof.
C1 verb /ˌriːˈvæmp/

revamp

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.
C1 noun /ˌrɛmɪˈnɪsəns/

reminiscence

Meaning
a story or memory about past events
Example
He shared a reminiscence of his childhood days in the village.
C1 verb /reɪz/

raze

Meaning
To completely destroy or demolish something, especially a building.
Example
The old factory was razed to make way for new apartments.
C1 adjective /rɪˈkʌr.ənt/

Recurrent

Meaning
happening repeatedly; occurring again and again; periodic;
Example
She has been suffering from recurrent headaches for months.
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.
C1 verb /ˈrʌf.l̩/

ruffle

Meaning
to disturb the smoothness of something; to annoy or upset someone
Example
The wind ruffled her hair.
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 /rəˈviːn/

ravine

Meaning
A deep, narrow valley with steep sides.
Example
The river carved a deep ravine through the mountains.
C1 verb /rɪˈkɔɪl/

recoil

Meaning
To suddenly spring back in fear, horror, or from force such as a gun's kickback.
Example
She recoiled at the sight of the snake.
C1 adjective /ˈrævənəs/

ravenous

Meaning
Extremely hungry; famished.
Example
After the long hike, she was ravenous and ate quickly.
C1 noun ˌriː.pɚˈkʌʃ.ənz

repercussions

Meaning
The unintended consequences or effects of an action or event.
Example
The new policy had unintended repercussions on the economy.