rig
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C1 verb /rɪɡ/

rig

Meaning
to manipulate or control something dishonestly; to set up equipment
Example
The election was rigged by corrupt officials.
C2 adjective /rɪˈflɛktɪbəl/

reflectible

Meaning
capable of being reflected, as light or an image
Example
The surface of the lake is highly reflectible in the morning sun.
C1 verb /ˈrʌf.l̩/

ruffle

Meaning
to disturb the smoothness of something; to annoy or upset someone
Example
The wind ruffled her hair.
B2 noun /rʌst/

Rust

Meaning
reddish-brown coating formed on iron or steel by oxidation; corrosion
Example
The old car was covered in rust after years of neglect.
C2 noun /rɪˈfrækʃən/

refraction

Meaning
The bending of light, sound, or other waves when they pass from one medium to another of different density.
Example
The refraction of light in water makes objects appear bent.
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.
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 verb /rɪˈkɔːl/

recall

Meaning
to bring (a memory, fact, or situation) back into one's mind
Example
I can't recall the last time we met.
A2 noun /rɒk/

rock

Meaning
a large, solid piece of mineral matter
Example
The mountain was made of solid rock.
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.
B2 noun, verb /ˈrætəl/

rattle

Meaning
to make a rapid series of short, sharp sounds; a device or object that makes such a sound
Example
The loose window began to rattle in the strong wind.
C2 adjective /rɪˈfʌldʒənt/

refulgent

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

recreant

Meaning
cowardly or unfaithful to duty
Example
The recreant soldier abandoned his post in fear.
C2 noun /rɪˈsɪdɪˌvɪzəm/

recidivism

Meaning
The tendency of a convicted criminal to reoffend or relapse into criminal behavior.
Example
The government introduced new programs to reduce recidivism among former inmates.
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.
A1 verb /riːd/

read

Meaning
to look at written words and understand their meaning
Example
I read books before going to bed.
C1 adjective /ˈriːɡəl/

regal

Meaning
Resembling or fit for a king; majestic or royal.
Example
The queen entered the hall with a regal presence.
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.
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 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 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 rɪsk-ədˈʤɛstɪd

risk-adjusted

Meaning
Modified or calibrated to account for risk factors in investment returns.
Example
Risk-adjusted returns consider both potential profit and loss.
B1 noun /roʊˈmæns/

Romance

Meaning
a feeling of excitement and mystery associated with love; a love affair or relationship
Example
Their romance began when they met at the university library.
C1 verb /ˌriːˈtʌtʃ/

retouch

Meaning
To improve or repair a picture, photograph, or image by making small changes.
Example
The photographer retouched the image to remove blemishes.
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.
B2 adjective /ˈrɪtʃ.u.əl/

Ritual

Meaning
relating to religious or ceremonial practices
Example
The wedding ceremony included many traditional ritual elements.
C1 noun /ˈruːdɪmənt/

rudiment

Meaning
A basic principle, element, or fundamental part of something.
Example
He learned the rudiments of music before joining the band.
B2 noun rɪˈtɛnʃən

retention

Meaning
The continued possession, use, or control of something
Example
The retention of information is essential for academic success.
C2 adjective /ˈrɛɡnənt/

regnant

Meaning
Reigning; currently holding power, authority, or dominance.
Example
The regnant queen introduced several reforms during her reign.
B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

Meaning
Strengthening or supporting something, especially behavior or learning.
Example
Positive reinforcement helps in learning.
C1 noun /rɪˌtæl.iˈeɪ.ʃən/

Retaliation

Meaning
the action of returning a military attack; counterattack; revenge for an injury or wrong
Example
The country threatened retaliation against any act of aggression.
B2 verb /rɪˈtriːt/

retreat

Meaning
to move back or withdraw from a position or situation
Example
The soldiers had to retreat after losing the battle.
B2 verb /riːˈɔːrɡənaɪz/

reorganize

Meaning
to arrange something again in a different way for greater efficiency or order
Example
The manager decided to reorganize the team structure.
B1 noun /rɪˈkwaɪə(r)mənt/

requirement

Meaning
something that is necessary or demanded
Example
The job has specific educational requirements.
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 adverb /ˈrɪdʒɪdli/

Rigidly

Meaning
in a strict, inflexible manner; without compromise
Example
The rules are rigidly enforced in this institution.
B2 verb /rɪˈliːv/

relieve

Meaning
to make pain, distress, or difficulty less severe or serious
Example
The medicine helped relieve his headache.
B1 noun /rɪˈwɔːd/

reward

Meaning
something given in recognition of service, effort, or achievement
Example
He received a reward for returning the lost wallet.
B2 adjective rɪˈnaʊnd

renowned

Meaning
Known or talked about by many people; famous.
Example
The renowned scientist led the reform panel.
C2 adjective /rɪˈprɛsəbl̩/

repressible

Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
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.
B2 verb /ˌriːəˈreɪndʒ/

rearrange

Meaning
to change the order or position of something
Example
She decided to rearrange the furniture in her living room.
C2 noun /ˈrɛdʒɪsaɪd/

regicide

Meaning
the act of killing a king
Example
The conspirators were executed for committing regicide.
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 verb /ˈrevəl/

revel

Meaning
to enjoy oneself in a lively and noisy way; to take great pleasure in
Example
They revel in their success.
C1 adjective /ˈreɡ.jʊ.lə.tər.i/

Regulatory

Meaning
Having the power to control or govern something through rules and regulations.
Example
The government enforces regulatory policies for financial stability.
B1 verb rɪˈdjuːst

reduced

Meaning
Make smaller or less in amount, degree, or size.
Example
Singapore has reduced plastic usage significantly.
C1 noun /rɪˌmjuː.nəˈreɪ.ʃən/

Remuneration

Meaning
money paid for work or services; compensation or reward
Example
The job offers excellent remuneration and benefits.
B1 adjective /ˈrɔɪ.əl/

Royal

Meaning
belonging to or connected with the monarch or monarchy; magnificent; excellent
Example
The royal family attended the ceremony.
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 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.
B2 noun /raɪˈnɒs.ər.əs/

Rhinoceros

Meaning
a large, heavy animal with thick skin and one or two horns on its nose
Example
The rhinoceros charged through the grassland.
C1 adjective /ˈræmpənt/

rampant

Meaning
existing or spreading unchecked, often in an undesirable way
Example
Corruption was rampant in the city administration.
C1 verb rɪˈplɛn.ɪʃ

replenish

Meaning
Fill something up again.
Example
Drinking water helps replenish lost fluids in the body.
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, 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.
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.
C2 noun /ˈrɛkjʊzənt/

recusant

Meaning
a person who refuses to submit to authority or comply with rules
Example
The recusant opposed the new law.
A2 adjective /ˈrʌʃən/

russian

Meaning
relating to Russia, its people, or its language
Example
She is studying the Russian language at university.
B2 verb /ˈraɪpən/

ripen

Meaning
to become or make something ready to eat or fully developed
Example
The bananas ripened quickly in the warm weather.
C1 adjective /ˈrævənəs/

ravenous

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

reflexible

Meaning
Capable of being reflected or bent back.
Example
The surface was highly reflexible, bouncing light in different directions.
C2 noun /ˌrɛprəˈbeɪʃən/

reprobation

Meaning
Strong disapproval or condemnation; rejection by God as beyond salvation.
Example
The teacher’s face showed clear reprobation at the student’s rude remark.
C1 adjective /rɪˈmoʊtɪd/

remoted

Meaning
placed at a distance; made remote
Example
The system was remoted to a secure location.
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.
B1 noun ˌrek.ə.menˈdeɪ.ʃənz

recommendations

Meaning
Suggestions or proposals as to the best course of action.
Example
The commission submitted their recommendations.
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 rɪˈlɪŋ.kwɪʃ

relinquish

Meaning
To give up any authority, responsibility, or property.
Example
He decided to relinquish his position as CEO.
C1 adjective /ˈræɡ.ɪd/

Ragged

Meaning
torn; tattered; frayed; shabby
Example
The homeless man wore ragged clothes.
B1 preposition /rɪˈɡɑrdɪŋ/

regarding

Meaning
concerning or relating to
Example
The decision regarding the meeting will be made tomorrow.
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.
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 noun /ˈruːlɪŋ/

ruling

Meaning
an official decision made by a judge or authority.
Example
The court’s ruling favored the defendant.
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.
B1 noun /ˈrʌnər/

runner

Meaning
a person who runs, especially in races or for exercise
Example
The runner crossed the finish line with a big smile.
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 /ˈrem.ə.di/

Remedy

Meaning
a medicine or treatment for a disease; a solution to a problem
Example
This herbal remedy helps with headaches.
C1 noun /rɪˈfaɪnəri/

refinery

Meaning
an industrial facility where raw materials are processed and purified
Example
The oil refinery processes thousands of barrels daily.
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 /ˈrɛplɪkeɪt/

replicate

Meaning
to copy, reproduce, or duplicate something exactly
Example
The scientist tried to replicate the experiment for accuracy.
B2 adverb /ˈræp.ɪd.li/

Rapidly

Meaning
at a fast speed; quickly
Example
The company is rapidly expanding into new markets.
C2 adjective /ˈrɛstɪv/

restive

Meaning
unable to stay still or silent; restless and impatient
Example
The crowd grew restive as they waited for the concert to begin.
C1 noun /ˌrɛstɪˈtjuːʃən/

restitution

Meaning
The act of restoring something to its rightful owner or compensating for loss
Example
The court ordered restitution to the victims of the fraud.
B2 verb /rɪˈkleɪm/

reclaim

Meaning
To take back or recover something; to restore to a usable state.
Example
The farmer worked to reclaim the barren land.
B1 noun rɪˈsɜː.tʃəz

researchers

Meaning
People who study and investigate to discover new information or facts.
Example
Researchers are working on innovative solutions.
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 noun /ˈrɒndɪvuː/

rendezvous

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

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
B1 noun /ˈref.ər.əns/

Reference

Meaning
the action of mentioning or alluding to something; a source of information
Example
Please provide references to support your research claims.
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 rɪˈkruːt.mənt

recruitment

Meaning
The action of finding new people to join an organization or support a cause.
Example
Recruitment strengthens the workforce.
B2 adverb /ruːˈtiːnli/

routinely

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

rouse

Meaning
To awaken from sleep or to stir into action.
Example
The loud alarm roused him from his deep sleep.
C2 noun /ˈreɪləri/

raillery

Meaning
good-humored teasing or joking
Example
Their friendship was full of light-hearted raillery.
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.
B2 adjective ˈræd.ɪ.kəl

radical

Meaning
Capable of bringing fundamental changes opposite to conventional beliefs or systems.
Example
The leader proposed radical economic reforms.
C1 adjective /raɪf/

rife

Meaning
widespread or common, often in a negative sense
Example
Corruption was rife in the old government system.
B2 adjective /rɪˈzɪl.i.ənt/

resilient

Meaning
Able to withstand or recover quickly from difficult conditions.
Example
Resilient materials ensure durability.
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.
A1 noun ˈræbɪt

rabbit

Meaning
A small mammal with long ears, long hind legs, and a short tail
Example
The rabbit ran quickly into the forest.
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 /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.
B1 noun /rɪˈpɔːtɪŋ/

reporting

Meaning
the act of giving news or information about something
Example
Good reporting is essential for public awareness.
B2 noun /ˈræŋkɪŋ/

ranking

Meaning
a position in a list or hierarchy, especially in terms of performance or importance
Example
His ranking in the competition improved after each round.
C2 adjective /rɪˈmiːdiəbl/

remediable

Meaning
capable of being corrected or cured
Example
The mistake was serious but still remediable.
C2 adjective /rɪˈfræɡəbəl/

refragable

Meaning
Capable of being refuted or disproved.
Example
His argument was weak and easily refragable.
B1 noun, verb /ˈrɒkɪt/

rocket

Meaning
a missile or vehicle propelled by a rocket engine; to increase or move very quickly
Example
The company’s profits rocketed after the new product launch.
C1 verb /ˌrekəˈlekt/

recollect

Meaning
to remember something; to recall from memory
Example
I can't recollect where I put my keys.
B2 noun /rɪˈdʒɛkʃən/

rejection

Meaning
the action of refusing or dismissing something or someone
Example
Her rejection of the offer surprised everyone.
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.
C2 noun /ˈrɪɡməˌroʊl/

rigmarole

Meaning
a long, complicated, and confusing process or story
Example
Getting a visa was such a rigmarole of paperwork and interviews.
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 verb /rɪˈdʒɛnəreɪt/

regenerate

Meaning
to grow or produce again; to renew or restore
Example
The lizard can regenerate its lost tail.
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 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

Meaning
To summarize and state again the main points of something.
Example
The teacher asked the student to recapitulate the lesson.
C2 noun /ˈrɛkwiəm/

requiem

Meaning
A mass, music, or ceremony for the repose of the souls of the dead.
Example
The choir performed a requiem in memory of the late leader.
B1 adjective /rʌf/

Rough

Meaning
having an uneven surface; not smooth; harsh
Example
The rough surface of the rock hurt my hands.
B1 noun /rɪˈkʌvəri/

recovery

Meaning
the process of recovering or returning to a normal state
Example
The patient is in recovery after the surgery.