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C1 noun /ˈroʊdənt/

rodent

Meaning
a small mammal such as a mouse, rat, or squirrel, characterized by constantly growing incisors
Example
The farmer set traps to catch the rodents in his barn.
A2 noun rɪˈsɜːtʃ

research

Meaning
The systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
Example
Research on radio waves began earlier in India.
C1 noun rɪˈfaɪnmənt

refinement

Meaning
The process of removing impurities or unwanted elements from a substance.
Example
His manners showed a refinement that made him stand out in any crowd.
B2 verb /rɪˈvoʊlt/

revolt

Meaning
to rebel against authority; to feel disgust
Example
The people revolted against the corrupt government.
B1 adjective /ˈrel.ə.vənt/

Relevant

Meaning
closely connected or appropriate to what is being discussed; pertinent
Example
Please provide only relevant information for this discussion.
B2 verb /ˈreɪn.dʒɪŋ/

ranging

Meaning
Extending or varying between limits.
Example
The temperatures are ranging from 15 to 30 degrees this week.
B1 noun /rɪˈpleɪsmənt/

replacement

Meaning
the act of substituting one thing or person for another
Example
She got a replacement for her damaged phone.
A2 verb /rɪˈkwaɪər/

require

Meaning
to need something; to demand or insist on
Example
This job requires excellent communication skills.
C2 noun /ˈræʃənəlɪzəm/

rationalism

Meaning
a belief or theory that opinions and actions should be based on reason and knowledge rather than religious belief or emotion
Example
Rationalism emphasizes logic and reasoning over faith.
B2 noun /ˈreɪ.zən/

Raisin

Meaning
dried grape
Example
She added raisins to the oatmeal cookies for extra sweetness.
A2 noun /ˈreɪl.weɪ/

Railway

Meaning
a track made of steel rails along which trains run; a system of tracks with trains, stations, and other facilities
Example
The railway connects major cities across the country.
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.
B2 noun/adjective /rɪˈpʌblɪkən/

republican

Meaning
a member or supporter of a republican political party or system
Example
The republican candidate won the election.
C2 noun /rɪˈpʌɡ.nəns/

repugnance

Meaning
intense disgust or strong aversion towards something
Example
She felt deep repugnance at the cruelty of the act.
C1 noun /rəʊˈbɒt.ɪk ˈsɜː.dʒər.i/

robotic surgery

Meaning
Surgery performed with the assistance of robotic systems to enhance precision and reduce invasiveness.
Example
Robotic surgery enhances precision in complex procedures.
A2 adverb /ˈrɑː.ðər/

Rather

Meaning
to some extent; instead; preferably
Example
I would rather stay home than go to the party.
B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

Meaning
Strengthening or supporting something, especially behavior or learning.
Example
Positive reinforcement helps in learning.
A2 noun /ruːf/

roof

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

Rib

Meaning
one of the curved bones that protect the chest and lungs
Example
He broke his rib in the accident.
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.
C2 adjective /ˈræfɪʃ/

raffish

Meaning
unconventional and slightly disreputable but attractive
Example
He had a raffish charm that made him popular in the city.
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 /ˌrɛtrɪˈbjuːʃən/

retribution

Meaning
punishment inflicted as vengeance for a wrong or crime
Example
The villagers demanded retribution for the crime committed.
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.
B2 noun ˌrɛvəˈluːʃən

revolution

Meaning
A forcible overthrow of a government or social order, in favor of a new system.
Example
The story is set during the French Revolution.
A2 noun /ˈrɛsɪpi/

recipe

Meaning
a set of instructions for preparing a particular dish, including a list of the ingredients required
Example
I found a great recipe for chocolate cake.
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 noun, adjective /ˈrɛvərənd/

reverend

Meaning
A title of respect used for members of the clergy; deserving deep respect.
Example
The Reverend gave an inspiring sermon at the church.
C2 verb /ruː/

rue

Meaning
To feel regret or sorrow about something.
Example
She will rue the day she trusted him.
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.
C2 noun /roʊˈtʌn.də.ti/

rotundity

Meaning
the quality of being round or plump
Example
The rotundity of the balloon made it float gracefully.
C2 noun /ˈrɪp.lɪt/

ripplet

Meaning
a small or tiny ripple
Example
Tiny ripplets appeared on the lake as the fish moved.
A1 noun /roʊd/

road

Meaning
a wide way leading from one place to another
Example
We drove along the road to the village.
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 adjective /ˈrɛtɪsənt/

reticent

Meaning
not revealing one's thoughts or feelings readily; reserved
Example
She was reticent about her personal life.
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 /riˈæk.tɪv/

Reactive

Meaning
responding to situations rather than initiating them; chemically active
Example
The company took a reactive approach to customer complaints.
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.
B1 adjective, noun /ˈroʊmən/

roman

Meaning
relating to Rome or its people; a citizen of ancient Rome
Example
The Roman Empire influenced much of modern civilization.
C2 adjective /rɪˈkʌmbənt/

recumbent

Meaning
lying down or in a resting position
Example
He was found recumbent on the sofa after a long day.
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 noun /ˈrez.ɪ.dənt ˈkəʊ.ɔː.dɪ.neɪ.tər/

resident coordinator

Meaning
A local administrator or official who coordinates activities in a specific region.
Example
The resident coordinator welcomed all representatives.
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 /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.
B1 noun /roʊp/

rope

Meaning
a strong, thick cord made of twisted fibers or strands
Example
The climbers used a rope to scale the mountain.
B2 verb /riːp/

reap

Meaning
to cut or gather a crop; to receive as a consequence of actions
Example
Farmers reap wheat in the late summer.
C1 adjective /ˌrɛprɪzɛnˈteɪʃənl̩/

representational

Meaning
Relating to or depicting something in a realistic or symbolic way.
Example
The artist preferred a representational style of painting.
C2 verb /rɪˈpaɪn/

repine

Meaning
To feel or express discontent or to long for something.
Example
She did not repine at her misfortune but worked harder to improve her life.
B1 adjective /rɪˈtaɪərd/

Retired

Meaning
having left one's job and ceased to work; withdrawn from activity
Example
My retired grandfather enjoys gardening in his free time.
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

Meaning
to make a preliminary inspection or survey, especially of an area for military or strategic purposes
Example
The soldiers reconnoitered the area before advancing.
B2 noun /ˈreɪ.zɪnz/

Raisins

Meaning
dried grapes, often used in cooking and baking
Example
She added raisins to the oatmeal cookies for extra sweetness.
A1 adjective /raʊnd/

round

Meaning
having a circular shape; shaped like a sphere or disk
Example
The table was round and had a smooth surface.
B1 noun /ˈrʌbɪʃ/

Rubbish

Meaning
waste material; refuse or litter; nonsense or worthless things
Example
Please throw the rubbish in the bin.
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.
C2 noun /rɪˈfræk.tər/

refractor

Meaning
A type of telescope that uses lenses to focus light.
Example
Refractor telescopes use lenses to focus light.
C1 verb /rɪˈvɜːrbəreɪt/

reverberate

Meaning
To echo repeatedly or have continuing effects.
Example
The sound of the explosion reverberated through the valley.
C1 adjective /ˈrɛzənənt/

resonant

Meaning
Deep, clear, and continuing to sound or echo.
Example
The resonant voice of the speaker filled the hall.
C1 verb /ˌriː.kənˈviːn/

reconvene

Meaning
to gather or assemble again, especially for a meeting
Example
The committee will reconvene after lunch.
A2 noun /rɒk/

rock

Meaning
a large, solid piece of mineral matter
Example
The mountain was made of solid rock.
C1 noun /rɪˈpraɪ.zəl/

Reprisal

Meaning
an act of retaliation; revenge taken for an injury or wrong
Example
The attack was carried out as a reprisal for the earlier bombing.
C2 adjective /rɪˈfɛrəbəl/

referable

Meaning
able to be related or directed to something
Example
The issue is referable to the new policy changes.
B2 verb /ˌriː.kənˈstrʌkt/

reconstruct

Meaning
to build or form something again after it has been damaged or destroyed
Example
The city was reconstructed after the earthquake.
B2 noun /ˈreɪ.zər/

Razor

Meaning
a sharp-edged instrument used for shaving hair from the skin
Example
He shaved his beard with a sharp razor.
C2 adjective /rɪˈfjuː.tə.bəl/

Refutable

Meaning
capable of being proven wrong or false; able to be disproved
Example
His theory was refutable because it could be tested experimentally.
B2 adverb /ruːˈtiːnli/

routinely

Meaning
as part of a regular procedure; habitually
Example
The staff routinely checks the equipment for safety.
C1 noun /rɪˈpʌlʃən/

Repulsion

Meaning
a feeling of intense distaste or disgust; a force under the influence of which objects tend to move away from each other
Example
She felt a strong repulsion towards the idea of eating insects.
A2 adjective /riːl/

Real

Meaning
actually existing; genuine; not imaginary or fake
Example
This is a real diamond, not a fake one.
C2 adjective /rɪˈfʌldʒənt/

refulgent

Meaning
Shining brightly; radiant.
Example
The refulgent sun lit up the entire valley.
C2 noun /ˈreɪmənt/

raiment

Meaning
clothing, especially fine or formal wear
Example
The king wore royal raiment during the ceremony.
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 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 /rɪft/

rift

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

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
B2 noun /ˈruːlɪŋ/

ruling

Meaning
an official decision made by a judge or authority.
Example
The court’s ruling favored the defendant.
B2 noun ˌrev.əˈluː.ʃənz

revolutions

Meaning
Dramatic and wide-reaching changes in political, social, or economic systems, often involving the overthrow of a government or social order.
Example
Revolutions often lead to significant societal changes.
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.
C2 adjective /rɪˈprɛsəbl̩/

repressible

Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
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.
C2 noun /ˈrɛkluːsəri/

reclusory

Meaning
A place for seclusion or retreat, especially for a recluse or hermit.
Example
The monk spent years in the reclusory away from society.
B1 noun /ˌrɛp.jʊˈteɪ.ʃən/

reputation

Meaning
The opinion generally held about someone or something; fame or prestige.
Example
A good reputation is essential for business success.
A2 adverb /ˈrɛɡjələrli/

regularly

Meaning
at regular intervals; in a regular manner
Example
She exercises regularly to stay healthy.
B2 verb /rɪˈtriːv/

retrieve

Meaning
to get something back that was lost or taken; to recover
Example
She managed to retrieve her lost phone from the taxi.
C1 adjective /rɪˈzɪdjuəl/

residual

Meaning
Remaining after the greater part has gone.
Example
The patient experienced residual pain after the surgery.
B2 noun /ˈruːmər/

Rumour

Meaning
a currently circulating story or report of uncertain or doubtful truth; gossip
Example
There's a rumour that the company will close next month.
B2 adjective /ˈrɪɡ.ər.əs/

rigorous

Meaning
Extremely thorough and demanding in analysis or practice.
Example
A rigorous study plan helps students achieve better results.
B2 noun /reɪˈʒiːm/

regime

Meaning
a system or form of government, often authoritarian
Example
The military regime controlled the country for decades.
A2 preposition /riː/

re

Meaning
concerning or about (used in formal letters or emails)
Example
The letter was sent re your recent application.
C1 verb /ˌriːəˈfɜːrm/

reaffirm

Meaning
To state again strongly; to confirm or strengthen a statement or belief.
Example
The president reaffirmed his commitment to education reform.
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.
B2 verb /ˈrendər/

render

Meaning
to provide or give; to make or cause to become
Example
The artist renders the scene beautifully.
B2 noun /ˈriːzənɪŋ/

reasoning

Meaning
the process of thinking about something in a logical way in order to form a conclusion or judgment
Example
Her reasoning for leaving was clear and logical.
B2 adverb /ˈraɪtli/

Rightly

Meaning
correctly; properly; justly
Example
She rightly pointed out the mistakes in the report.
B1 adjective /ˈrel.ə.tɪv/

Relative

Meaning
considered in comparison to something else; not absolute; comparative
Example
The cost of living is relative to your income level.
B1 noun /ˈrʌbər/

rubber

Meaning
a tough elastic substance made from the latex of tropical plants or synthetically, used for making tires, boots, and other products.
Example
The tires are made of natural rubber.
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 ˌriːˈstrʌk.tʃər.ɪŋ

restructuring

Meaning
The action of organizing something differently.
Example
The company underwent restructuring to improve efficiency.
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.
C2 noun /ˌrɛv.əˈkeɪ.ʃən/

revocation

Meaning
The act of officially canceling or withdrawing something.
Example
The court ordered the revocation of his license.
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/noun /ˈrɛlɪʃ/

relish

Meaning
to greatly enjoy; also a condiment or sauce
Example
She relished the opportunity to travel abroad.
B2 verb /rɪˈfaɪn/

refine

Meaning
to improve by making small changes; to purify
Example
The chef refines the recipe to perfection.
C1 adjective /ˈrek.wɪ.zɪt/

Requisite

Meaning
made necessary by particular circumstances; required
Example
Good communication skills are requisite for this job.
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 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 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.
C2 noun /ˈræŋ.kər/

rancor

Meaning
A feeling of deep and bitter anger or resentment.
Example
There was a rancor between the two rivals that never faded.
B2 verb /rɪˈzɛnt/

resent

Meaning
to feel bitterness or displeasure about something or someone
Example
She began to resent the constant criticism from her boss.
B2 verb /rɪˈzɑlv/

resolve

Meaning
to solve a problem; to decide firmly
Example
The manager resolves the conflict between employees.
A2 noun /ruːlz/

rules

Meaning
explicit principles or regulations governing conduct or procedure within a particular area of activity
Example
The teacher reminded the students to follow the classroom rules.
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.
B2 noun /rɪˈstrɪk.ʃən/

Restriction

Meaning
a limiting condition or measure; the limitation or control of someone or something
Example
There are strict restrictions on smoking in public places.
B1 noun /ˈrezɪdənt/

Resident

Meaning
a person who lives somewhere permanently or on a long-term basis; living in a particular place
Example
She has been a resident of this city for over ten years.
B1 verb /riˈækt/

react

Meaning
to respond or behave in a particular way to something
Example
She reacted angrily when she heard the news.
C1 noun /ˈrɒndɪvuː/

rendezvous

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

rankle

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