raw materials
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B1 noun rɔː mətɪˈrɪəlz

raw materials

Meaning
The basic material from which a product is made.
Example
The factory imports raw materials for production.
C1 noun /ˈræftər/

rafter

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

replicate

Meaning
to copy, reproduce, or duplicate something exactly
Example
The scientist tried to replicate the experiment for accuracy.
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.
C2 adjective /rɪˈzɪstləs/

resistless

Meaning
Impossible to resist; having an overpowering effect.
Example
She felt a resistless urge to laugh at the joke.
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 /ˌrɛtroʊˈæktɪv/

retroactive

Meaning
applying to a period before it was enacted or established
Example
The new law was made retroactive to cover past cases.
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.
B2 adverb /rɪˈspektɪvli/

Respectively

Meaning
in the order given; separately and in the order already mentioned
Example
John and Mary are 25 and 30 years old respectively.
C2 noun /ˌræproʊʃˈmɑːn/

rapprochement

Meaning
The establishment or resumption of harmonious relations.
Example
The two countries signed an agreement that marked a new rapprochement.
C2 adjective /roʊˈtʌnd/

rotund

Meaning
round or plump in shape; full in sound
Example
The rotund cat struggled to climb the fence.
B2 adjective /rɪˈlaɪ.ənt/

reliant

Meaning
depending on someone or something for support
Example
The country is too reliant on imported goods.
C1 noun rɪˌkuːpərˈeɪʃən

recuperation

Meaning
The process of gradually recovering from illness or fatigue
Example
Rest is essential for recuperation after illness.
C1 adjective /rɪˈtɜː.nə.bəl/

Returnable

Meaning
able to be returned or given back
Example
The bottle is returnable for a deposit refund.
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 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.
B1 noun rɪˈflɛkʃən

reflection

Meaning
Serious thought or consideration about something.
Example
The reflection of the past filled his heart with sadness.
A2 verb /rɪˈdjuːs/

reduce

Meaning
to make smaller in size, amount, or degree; to decrease
Example
We need to reduce our expenses this month.
B2 noun, verb /rɪər/

rear

Meaning
the back part of something; to bring up or raise children or animals
Example
The mother cat reared her kittens in a quiet corner.
C1 verb /ræsp/

rasp

Meaning
to speak in a rough, harsh voice or to scrape with a coarse sound
Example
He rasped out a warning before collapsing.
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 /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 verb /rɪˈmjuːnəreɪt/

remunerate

Meaning
To pay someone for services or work done.
Example
The company will remunerate employees fairly for their overtime.
A2 verb /rɪˈkwaɪər/

require

Meaning
to need something; to demand or insist on
Example
This job requires excellent communication skills.
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.
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 rɪˈtɛnʃən

retention

Meaning
The continued possession, use, or control of something
Example
The retention of information is essential for academic success.
B2 verb /rɪˈkʌvərɪŋ/

recovering

Meaning
the process of getting better after illness, loss, or difficulty
Example
She is still recovering from the flu.
C2 noun /rʌmp/

Rump

Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
B1 noun ˌrekəɡˈnɪʃn

recognition

Meaning
Acknowledgment of the existence, validity, or legality of something; appreciation or acclaim for an achievement, service, or ability.
Example
He earned recognition after years of struggle.
C2 noun /ˌrɛprɪˈhɛnʃən/

reprehension

Meaning
The act of rebuking or criticizing severely.
Example
The teacher’s reprehension of the student’s behavior was justified.
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.
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.
C2 adjective /ræpˈtɔːriəl/

raptorial

Meaning
Relating to birds of prey or predatory behavior.
Example
The eagle is a raptorial bird with sharp talons.
B2 noun ˌrɛstəˈreɪʃən

restoration

Meaning
The process of returning something to its former condition.
Example
The restoration of the forest began after decades of neglect.
B1 adjective /rɪˈlɪdʒəs/

Religious

Meaning
relating to or believing in a religion; devout; spiritual;
Example
He comes from a very religious family.
A2 verb riˈsaɪklɪŋ

recycling

Meaning
The process of converting waste materials into new materials and objects to prevent waste.
Example
Recycling plastic helps in reducing waste.
B2 noun /rɪˈmeɪn.dər/

Remainder

Meaning
the part that is left over; what remains after the other parts have been taken away
Example
The remainder of the food was stored in the refrigerator.
C2 verb /rɛtʃ/

retch

Meaning
to make the sound and movement of vomiting without bringing anything up
Example
The smell of spoiled food made him retch violently.
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.
C1 noun /ˈrɛtɪsəns/

reticence

Meaning
the quality of being reserved or unwilling to speak freely
Example
His reticence made it difficult to know what he was thinking.
B2 noun ˈrɛvənuː

revenue

Meaning
Income, especially when of a company or organization.
Example
The company's revenue grew by 10% this year.
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.
B1 noun rɪˈzɪs.təns

resistance

Meaning
The refusal to accept or comply with something; the attempt to prevent something by action or argument.
Example
The resistance fought bravely against colonial forces.
B2 verb /roʊm/

roam

Meaning
to walk or travel without a specific destination; to wander
Example
Wild animals roam freely in the forest.
B2 adjective /rɪˈfreʃ.ɪŋ/

Refreshing

Meaning
making one feel energized and renewed; pleasantly new or different
Example
The cool breeze was refreshing after the hot day.
C1 verb /rɪˈvɪər/

revere

Meaning
To deeply respect or admire someone or something.
Example
The students revered their teacher for his wisdom.
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 /roʊt/

rote

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

repel

Meaning
To push away or force apart due to similar charges or properties.
Example
Protons repel each other.
C1 verb ˈrɛk.tɪ.faɪ

rectify

Meaning
To correct mistakes or make something right.
Example
The company took steps to rectify its financial mistakes.
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 verb /ˈrɪdɪkjuːl/

ridicule

Meaning
To make fun of someone or something in a cruel or dismissive way.
Example
He was ridiculed for his strange ideas.
C2 noun /ˌrɛv.əˈkeɪ.ʃən/

revocation

Meaning
The act of officially canceling or withdrawing something.
Example
The court ordered the revocation of his license.
B2 adjective rɪˈnaʊnd

renowned

Meaning
Known or talked about by many people; famous.
Example
The renowned scientist led the reform panel.
A1 adverb /ˈriː.ə.li/

Really

Meaning
actually; truly; very much
Example
I really enjoyed the concert last night.
C2 adjective /ˌriːkruːˈdɛsənt/

recrudescent

Meaning
reviving or breaking out again after a period of abatement
Example
Recrudescent tensions threatened the fragile ceasefire.
B2 noun/verb /ræft/

raft

Meaning
A flat structure made of logs or planks tied together, used as a boat or floating platform; to travel or transport on such a structure.
Example
They built a raft to cross the river.
B2 adjective /ˈrek.ləs/

Reckless

Meaning
acting without thinking about consequences; careless; dangerous;
Example
His reckless driving caused a serious accident.
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.
C1 noun /ræˈpɔːr/

rapport

Meaning
A close and harmonious relationship in which the people or groups concerned understand each other's feelings or ideas.
Example
The teacher built a strong rapport with her students.
B2 noun /'ræd.ɪʃ/

Radish

Meaning
a small pungent edible root vegetable with white or red skin
Example
The farmer harvested fresh radishes from the garden.
C1 verb /riːˈfɜːrbɪʃ/

refurbish

Meaning
To renovate or redecorate something, especially a building.
Example
The company decided to refurbish its old office.
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.
B2 noun, verb /rɪˈzɔːrt/

resort

Meaning
A place for rest or recreation; to turn to something for help or solution.
Example
They stayed at a beach resort during their vacation.
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.
C1 noun /ˈrep.lɪ.kə/

Replica

Meaning
an exact copy or model of something, especially one on a smaller scale
Example
The museum displayed a perfect replica of the ancient statue.
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.
C2 adjective /ˈrɪz.ə.bəl/

risible

Meaning
so absurd or ridiculous that it deserves to be laughed at
Example
The idea of flying pigs is completely risible.
C1 noun /rɪˈbʌtəl/

rebuttal

Meaning
a statement or argument made to oppose or disprove another
Example
Her rebuttal was clear and convincing.
C1 noun rɪˈdʒɛn.ər.ə.tɪv ˈfɑːr.mɪŋ

regenerative farming

Meaning
Agricultural practices that improve soil health and biodiversity.
Example
Regenerative farming improves soil fertility and biodiversity.
B1 adjective /rɪˈdɪk.jə.ləs/

Ridiculous

Meaning
extremely silly or unreasonable; deserving or causing laughter
Example
The idea of building a house without tools is ridiculous.
C1 verb /ˌriː.ɪˈstæblɪʃ/

reestablish

Meaning
to set up or restore something again after it has been disrupted
Example
The government worked hard to reestablish peace in the region.
C1 adjective /ˌrɛprɪˈhɛnsəbl̩/

reprehensible

Meaning
Deserving strong criticism or blame.
Example
His dishonest actions were truly reprehensible.
B2 noun /rɪˈvendʒ/

Revenge

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.
B1 verb /rɪˈvaɪz/

revise

Meaning
To change, improve, or update something, especially a written work.
Example
She had to revise her essay before submission.
B1 verb /rɑːb/

rob

Meaning
to steal money or property from a person or place; to commit robbery
Example
The thief tried to rob the bank last night.
C2 verb /ˈreə.rɪ.faɪ/

rarefy

Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
B1 noun /rɪˈtaɪə.mənt/

Retirement

Meaning
the action or fact of leaving one's job and ceasing to work; the period of life after leaving work
Example
He is planning his retirement after 40 years of service.
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 noun ˈrɛstɪŋ pleɪs

resting place

Meaning
A place where someone or something rests, especially a burial site.
Example
The resting place of the martyrs is near the river.
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 noun /ˈrɛnəˌsɑːns/

renaissance

Meaning
a revival of art, culture, or learning; a period of renewed interest and growth
Example
The city experienced a cultural renaissance during the 1990s.
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.
C2 noun /ˈrɛtɪnjuː/

retinue

Meaning
A group of attendants or followers accompanying an important person.
Example
The king entered the hall followed by his retinue.
C2 noun /ˈræp.aɪn/

rapine

Meaning
the violent seizure of someone's property
Example
The war was marked by rapine and destruction.
C2 noun /ruːθ/

ruth

Meaning
A feeling of pity, compassion, or sorrow.
Example
He felt no ruth for the people he had betrayed.
B2 verb /rɪˈzɛmbəl/

resemble

Meaning
to look like or be similar to something or someone
Example
She resembles her mother in both appearance and mannerisms.
B2 adjective /ˈruː.mi/

Roomy

Meaning
spacious; having a lot of room
Example
The apartment is very roomy with spacious bedrooms.
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 adjective /ræmˈbʌŋk.ʃəs/

rambunctious

Meaning
boisterous, energetic, and difficult to control.
Example
The rambunctious children filled the house with noise.
B2 adjective /ˈroʊlɪŋ/

rolling

Meaning
moving in gentle undulations; moving forward by turning over and over
Example
They drove through the rolling hills of the countryside.
C2 verb /rɪˈdaʊnd/

redound

Meaning
to contribute greatly to a result or consequence, usually beneficial
Example
His hard work will redound to the success of the company.
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 /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.
C2 adjective /ˈrɛɡnənt/

regnant

Meaning
Reigning; currently holding power, authority, or dominance.
Example
The regnant queen introduced several reforms during her reign.
A2 adverb /ˈriː.sənt.li/

Recently

Meaning
in the recent past; not long ago
Example
I recently moved to a new apartment.
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.
C1 adjective /ˈrævənəs/

ravenous

Meaning
Extremely hungry; famished.
Example
After the long hike, she was ravenous and ate quickly.
C2 verb /ˈræŋ.kəl/

rankle

Meaning
To cause continuing annoyance or resentment.
Example
His unfair criticism continued to rankle her for days.
C1 noun /ˈrʌmpəs/

Rumpus

Meaning
a noisy disturbance; an uproar or commotion
Example
The children caused quite a rumpus in the playground.
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 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 verb /raʊz/

rouse

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

resentment

Meaning
Bitter indignation at having been treated unfairly.
Example
Resentment grew among the students.
C1 verb /rɪˈpjuː.di.eɪt/

repudiate

Meaning
to refuse to accept, recognize, or support something
Example
He repudiated the claim that he was involved in the scandal.
B2 noun /ˌrezəˈveɪʃən/

Reservation

Meaning
the action of reserving something; an arrangement whereby something is reserved for a particular person; a qualification to an expression of agreement or approval
Example
I made a reservation at the restaurant for tonight.
A1 noun /reɪn/

Rain

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

resurgent

Meaning
Becoming strong, active, or popular again.
Example
The resurgent economy gave hope to many businesses.
C2 verb /rɪˈspaɪər/

respire

Meaning
To breathe in and out; to inhale and exhale.
Example
Plants also respire to release energy.
B2 adjective /rɪˈliːvd/

relieved

Meaning
feeling happy and less worried after something stressful has been removed or resolved
Example
She felt relieved after hearing the good news.
A2 adjective /riːl/

Real

Meaning
actually existing; genuine; not imaginary or fake
Example
This is a real diamond, not a fake one.
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 adjective /rɪˈpliːt/

replete

Meaning
Filled or well-supplied with something; abundantly full.
Example
The book is replete with fascinating historical details.
B1 noun /rɪˈpɔːtɪŋ/

reporting

Meaning
the act of giving news or information about something
Example
Good reporting is essential for public awareness.
C1 adjective /ˈræmpənt/

rampant

Meaning
existing or spreading unchecked, often in an undesirable way
Example
Corruption was rampant in the city administration.
C2 adjective /rɪˈsplɛndənt/

resplendent

Meaning
Shining brilliantly; dazzling in appearance or effect
Example
The bride looked resplendent in her wedding gown.
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.
B2 adjective /ˈrɪdən/

ridden

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

Reactive

Meaning
responding to situations rather than initiating them; chemically active
Example
The company took a reactive approach to customer complaints.