Requisite
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C1 adjective /ˈrek.wɪ.zɪt/

Requisite

Meaning
made necessary by particular circumstances; required
Example
Good communication skills are requisite for this job.
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 /ˈrɛplɪkeɪt/

replicate

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

reconvene

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

Revengeful

Meaning
seeking or desiring revenge; vindictive
Example
He became revengeful after being betrayed by his friend.
C1 adjective /rɪˈɡrɛtfəl/

regretful

Meaning
feeling or showing sadness or disappointment about something that has happened or been done
Example
She gave him a regretful smile as she turned away.
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 /ˈroʊtəri/

rotary

Meaning
Relating to or characterized by rotation; revolving around an axis.
Example
The machine uses a rotary engine to function efficiently.
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 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 adjective /rɪˈdʒɛn.ə.rə.tɪv/

regenerative

Meaning
Able to restore or renew damaged environments, soil, or resources.
Example
Regenerative farming improves soil health and biodiversity.
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 verb rɪˈplɛn.ɪʃ

replenish

Meaning
Fill something up again.
Example
Drinking water helps replenish lost fluids in the body.
C1 adverb /rɪˈspek.tə.bli/

Respectably

Meaning
in a way that is worthy of respect; decently; properly
Example
She was dressed respectably for the interview.
C1 noun/verb /rɪˈpriːz/

reprise

Meaning
A repetition or return to an earlier theme, role, or action.
Example
The actor reprised his role in the sequel.
C1 noun /rəˈpɪdəti/

rapidity

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

Roguish

Meaning
mischievous; playfully dishonest
Example
His roguish smile suggested he was up to some mischief.
C1 noun ˌriːˈstrʌk.tʃər.ɪŋ

restructuring

Meaning
The action of organizing something differently.
Example
The company underwent restructuring to improve efficiency.
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 verb /rɪˈbʌf/

rebuff

Meaning
to reject or refuse in a sharp or abrupt way
Example
She rebuffed his invitation to dinner.
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 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 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 /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 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 /ˈræn.sæk/

ransack

Meaning
to search a place roughly and steal or damage things
Example
Burglars ransacked the house while the family was away.
C1 verb /rɪˈkaʊnt/

recount

Meaning
to narrate or tell the details of an event or experience
Example
She recounted her adventures during the summer trip.
C1 adjective /rɪˈkʌr.ənt/

Recurrent

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

retrospect

Meaning
the act of looking back on or reviewing past events
Example
In retrospect, the decision seemed unwise.
C1 noun /rɪˈkɒnɪsəns/

reconnaissance

Meaning
A survey or exploration, especially for military or strategic purposes.
Example
The soldiers conducted a reconnaissance of the enemy camp.
C1 noun /ruːz/

Ruse

Meaning
an action intended to deceive someone; a trick or stratagem
Example
The thief used a clever ruse to distract the guard.
C1 verb /ˈrek.ən.saɪl/

reconcile

Meaning
Restore friendly relations between; cause to coexist in harmony.
Example
They tried to reconcile their differences through open communication.
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 /ˌrɛtrɪˈbjuːʃən/

retribution

Meaning
punishment inflicted as vengeance for a wrong or crime
Example
The villagers demanded retribution for the crime committed.
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 adjective /ˌrɛprɪˈhɛnsəbl̩/

reprehensible

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

revolting

Meaning
extremely unpleasant or disgusting
Example
The smell of the garbage was revolting.
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 /rɪˈpjuːt/

repute

Meaning
the opinion generally held of someone or something; reputation
Example
He is a scholar of great repute in his field.
C1 noun /rɪˈpen.təns/

Repentance

Meaning
the action of repenting; sincere regret or remorse
Example
His genuine repentance moved everyone in the courtroom.
C1 verb /ˈrɛlɪɡeɪt/

relegate

Meaning
to assign to a lower rank, position, or category
Example
The manager decided to relegate the player to the bench.
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 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 /ˈruː.mɪ.neɪt/

ruminate

Meaning
to think deeply about something; to chew cud (for animals)
Example
She sat alone to ruminate on her decision.
C1 noun rɪˌdʒɛnəˈreɪʃən

regeneration

Meaning
Renewal, growth and development of cells, tissues or energy
Example
Proper rest allows muscle regeneration after exercise.
C1 verb /rɪˈzaʊnd/

resound

Meaning
To fill a place with sound; to be celebrated or talked about widely.
Example
The hall resounded with applause.
C1 verb /ˈræʃənəlaɪz/

rationalize

Meaning
to attempt to explain or justify behavior or decisions with logical reasons, even if they are not true or appropriate
Example
She tried to rationalize her lateness by blaming the traffic.
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 /rɪˈklaɪn/

recline

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

rigor

Meaning
strictness, severity, or demanding conditions
Example
The training was carried out with great rigor.
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 /ˈræɡ.ɪd/

Ragged

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

reaper

Meaning
a person or machine that cuts and gathers crops
Example
The reaper moved slowly through the golden fields.
C1 noun/verb /rɪˈpoʊz/

repose

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.
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 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 noun /rɪˈvʌlʃən/

revulsion

Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
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 verb /rɪɡ/

rig

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

rejoin

Meaning
to join again or return to a group, place, or activity
Example
After a short break, she decided to rejoin the team.
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 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 /ˈreɪ.biːz/

rabies

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.
C1 verb /rɪˈkuːpəreɪt/

recuperate

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

readjust

Meaning
To change or move something again in order to achieve a better fit, condition, or balance.
Example
He readjusted the chair to make it more comfortable.
C1 noun /rɪˈmɛmbrəns/

remembrance

Meaning
the act of remembering or honoring someone or something
Example
A service was held in remembrance of the fallen soldiers.
C1 noun /ˈrɛt.ər.ɪk/

rhetoric

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.
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 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 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 verb /rɪˈpiːl/

repeal

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

reparation

Meaning
the making of amends for a wrong done by paying money or helping those who were wronged
Example
The government offered reparations to the victims of the conflict.
C1 verb /rɪˈlɛnt/

relent

Meaning
to become less severe, harsh, or strict
Example
After hours of begging, she finally relented.
C1 noun rɪˈdʌndənsi

redundancy

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.
C1 adjective /ˈræb.ɪd/

rabid

Meaning
Having extreme or fanatical support for something; relating to or suffering from rabies.
Example
He was a rabid fan of the football team.
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 /ˈraɪtʃəsnəs/

righteousness

Meaning
the quality of being morally right or justifiable
Example
His life was dedicated to righteousness and truth.
C1 verb /raɪl/

rile

Meaning
to irritate or annoy someone
Example
His careless comments really riled her.
C1 noun /riːk/

Reek

Meaning
to have a very unpleasant smell; to give a strong impression of something unpleasant or undesirable
Example
The garbage can reeks of rotten food.
C1 verb /rɪˈbjuːk/

rebuke

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

Revolver

Meaning
a pistol with revolving chambers enabling several shots to be fired without reloading
Example
The detective drew his revolver from its holster.
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 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/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 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.
C1 adjective /rɪˈzɪstɪv/

resistive

Meaning
tending to resist or oppose; in physics, relating to electrical resistance
Example
The material has resistive properties that slow down current flow.
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/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 noun /rɪˈbʌtəl/

rebuttal

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

rousing

Meaning
Exciting, inspiring, or stirring.
Example
The speaker delivered a rousing speech that moved the audience.
C1 adjective /raɪf/

rife

Meaning
widespread or common, often in a negative sense
Example
Corruption was rife in the old government system.
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 /ˈræp.tʃər/

rapture

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

referrer

Meaning
a person who directs someone to another person or service
Example
The referrer earned a bonus for recommending a new client.
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 noun /rɪˈtrækʃən/

retraction

Meaning
the act of taking back a statement, promise, or belief
Example
The newspaper issued a retraction of the false report.
C1 adjective rɪˈsɛʃ.ən.er.i

recessionary

Meaning
Relating to or characterized by economic recession.
Example
Governments introduce policies to counter recessionary effects.
C1 adjective /rɪˈtaɪərɪŋ/

retiring

Meaning
Shy and reserved; avoiding social contact.
Example
She is a quiet, retiring woman who avoids attention.
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 noun /rɪˈmɪt.əns/

Remittance

Meaning
A sum of money sent in payment or as a gift.
Example
The country's economy benefits from expatriate remittance.
C1 noun /rɪˈzʌmp.ʃən/

Resumption

Meaning
the action of beginning something again after a pause or interruption
Example
The resumption of classes will be announced next week.
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 noun /roʊt/

rote

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

recalibrate

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.
C1 noun ˈrɔɪəl ˈbɛŋɡəl ˈtaɪɡər

Royal Bengal Tiger

Meaning
A subspecies of tiger found primarily in India and Bangladesh, known for its distinctive orange coat with black stripes.
Example
The Royal Bengal Tiger is an iconic species of the Sundarbans.
C1 verb /ˌriːhəˈbɪlɪteɪt/

rehabilitate

Meaning
to restore someone to health, normal life, or a good condition after illness, injury, or imprisonment
Example
The clinic helps rehabilitate injured athletes.
C1 adjective, noun /rɪˈsiːvəbl/

receivable

Meaning
Money that is owed to a company and is expected to be paid.
Example
The company's receivables increased significantly this quarter.
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 /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 noun /rɪdʒ/

ridge

Meaning
a long, narrow hilltop, mountain range, or raised strip
Example
We walked along the mountain ridge.
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 verb /rɪˈsɜːrdʒ/

resurge

Meaning
To rise, increase, or become active again after a decline.
Example
Interest in traditional crafts has begun to resurge.
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 /ˈreɪdiənt/

radiant

Meaning
Shining brightly; expressing great happiness.
Example
She looked radiant in her wedding dress.
C1 noun /rɪˈpɑːzɪtɔːri/

repository

Meaning
a place where things are stored or kept for safekeeping
Example
The library serves as a repository of knowledge.
C1 adjective /ˈrɪvɪtɪŋ/

riveting

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

revolutionize

Meaning
Change (something) radically or fundamentally.
Example
Artificial intelligence is set to revolutionize the healthcare sector.