reminder
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B2 noun /rɪˈmaɪndər/

reminder

リマインダー
Meaning
something that helps you remember a fact, event, or action that you need to do or recall
Example
He set a reminder to call his mother on her birthday.
彼は母親の誕生日に電話するためにリマインダーを設定しました。
C1 verb /ˌriːɪnˈsteɪt/

reinstate

再雇用する
Meaning
To restore someone or something to their former position or condition.
Example
The company decided to reinstate the suspended employee.
その会社は停止された従業員を再雇用することを決定した。
C1 adjective /ˌrɛprɪˈhɛnsəbl̩/

reprehensible

非難すべき
Meaning
Deserving strong criticism or blame.
Example
His dishonest actions were truly reprehensible.
彼の不誠実な行動は本当に非難すべきものでした。
B1 noun /ˈrɛntəl/

rental

レンタル
Meaning
an arrangement in which something is rented, or the amount paid for renting
Example
The car rental was more expensive than we expected.
レンタカーは予想より高かった。
C1 adjective /rɪˈbel.jəs/

Rebellious

反抗的な; 不従順な; 権威に反発する;
Meaning
defying authority; resisting control; disobedient;
Example
The rebellious teenager refused to follow his parents' rules.
反抗的なティーンエイジャーは、両親の規則に従うことを拒否した。
C1 noun /rʌsk/

Rusk

乾燥ビスケット; トーストパン
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.
赤ちゃんはミルクと一緒に柔らかいラスクを食べるのが好きでした。
C1 noun /ˈrem.nənt/

Remnant

残留物
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.
古代の壁の残り物だけが残っています。
B2 noun /ˈrɛzərvwɑːr/

reservoir

貯水池
Meaning
A large natural or artificial lake used as a source of water supply.
Example
The city built a new reservoir to ensure enough drinking water for its residents.
その都市は住民に十分な飲料水を確保するために新しい貯水池を建設した。
C1 adjective /ˈrɪkɪti/

rickety

ぐらつく
Meaning
Poorly made and likely to collapse; shaky.
Example
They crossed a rickety wooden bridge over the river.
彼らは川を越える不安定な木製の橋を渡りました。
B2 noun /ˈrɪdəl/

Riddle

謎
Meaning
a question or statement intentionally phrased so as to require ingenuity in ascertaining its answer or meaning; a puzzle
Example
The ancient riddle stumped all the scholars for years.
その古代の謎は何年もの間、すべての学者を困らせました。
C1 noun /ˈrəʊ.bɒt əˈsɪs.tɪd prəˈsiː.dʒərz/

robot-assisted procedures

ロボット支援手術
Meaning
Medical operations performed with the help of robotic systems to enhance precision and control.
Example
Robot-assisted procedures reduce human error.
ロボット支援手術は人為的な誤りを減らします。
C1 verb /riːl/

reel

つまずく / 巻き取る
Meaning
to lose balance and stagger; to wind or spin something onto a reel
Example
He reeled backward after being punched.
彼は殴られた後、後ろに転んだ。
C1 adjective /ˈræmʃækəl/

ramshackle

ぼろぼろ
Meaning
poorly built or maintained; in a state of disrepair
Example
They lived in a ramshackle old house on the edge of town.
彼らは町の端にあるぼろぼろな古い家に住んでいました。
B2 noun /ˈraɪvəl/

Rival

ライバル; 競争相手;
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.
二つの企業は何十年もの間、商業上のライバルです。
B2 verb /rɪˈvoʊlt/

revolt

反乱する
Meaning
to rebel against authority; to feel disgust
Example
The people revolted against the corrupt government.
人々は腐敗した政府に反乱を起こしました。
C1 noun /ˈrɛzɪn/

resin

樹脂
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.
職人は彫刻を輝かせるために天然の樹脂を使用しました。
C1 verb /ˈrɪvɪt/

rivet

リベットで固定する / 注意を引く
Meaning
to fasten or secure with a rivet; to hold someone’s attention firmly
Example
The craftsman riveted the metal plates together.
職人は金属の板をリヴェットで留めました。
C1 adjective rɪsk-ədˈʤɛstɪd

risk-adjusted

リスク調整済み
Meaning
Modified or calibrated to account for risk factors in investment returns.
Example
Risk-adjusted returns consider both potential profit and loss.
リスク調整後のリターンは、潜在的な利益と損失の両方を考慮します。
B1 verb /rɪˈviːl/

reveal

明らかにする
Meaning
to make known or show something that was hidden
Example
The investigation revealed the truth.
調査は真実を明らかにした。
C1 noun /rɪˈfaɪnəri/

refinery

製油所
Meaning
an industrial facility where raw materials are processed and purified
Example
The oil refinery processes thousands of barrels daily.
石油精製所は毎日何千バレルもの石油を処理します。
C2 noun /ˌrep.ɑːˈtiː/

Repartee

機知に富んだ返答
Meaning
conversation or speech characterized by quick, witty comments or replies
Example
The dinner party was filled with brilliant repartee between the guests.
ディナーでは、ゲスト間で素晴らしい機知に富んだ返答が交わされていました。
A2 verb /rɪˈmuːv/

remove

削除する
Meaning
to take something away; to eliminate or delete
Example
Please remove your shoes before entering the house.
家に入る前に靴を脱いでください。
B2 verb /rɪˈliːv/

relieve

Meaning
to make pain, distress, or difficulty less severe or serious
Example
The medicine helped relieve his headache.
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.
B2 adverb /ˈred.ɪ.li/

Readily

快く; 簡単に; ためらわずに
Meaning
willingly; easily; without hesitation
Example
She readily agreed to help with the project.
彼女は喜んでプロジェクトを手伝うことに同意した。
B1 noun /ˈrezɪdənt/

Resident

住民
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.
彼女はこの都市の住民で、10年以上住んでいます。
A1 noun ˈræbɪt

rabbit

ウサギ
Meaning
A small mammal with long ears, long hind legs, and a short tail
Example
The rabbit ran quickly into the forest.
ウサギは森の中を速く走った。
A2 noun /rent/

Rent

幸せ
Meaning
a payment made periodically by a tenant to a landlord for use of property
Example
The monthly rent for this apartment is quite affordable.
彼女は賞を受け取ったとき、自分の幸せを隠すことができませんでした。
C1 verb /ˈrævɪdʒ/

ravage

荒廃させる
Meaning
to cause severe and extensive damage or destruction
Example
The hurricane ravaged the coastal villages.
ハリケーンは沿岸の村を荒廃させた。
B2 verb /ˈrendər/

render

提供する
Meaning
to provide or give; to make or cause to become
Example
The artist renders the scene beautifully.
アーティストはシーンを美しく表現します。
B2 adjective /rɪˈspɒn.sɪv/

Responsive

反応が早い
Meaning
reacting quickly and positively; readily reacting to suggestions or changes
Example
The website is very responsive and loads quickly on all devices.
そのウェブサイトは非常にレスポンシブで、すべてのデバイスで迅速に読み込まれます。
B1 noun /ˌrɛp.jʊˈteɪ.ʃən/

reputation

評判, 名声
Meaning
The opinion generally held about someone or something; fame or prestige.
Example
A good reputation is essential for business success.
良い評判はビジネスの成功に不可欠です。
B1 adjective /rɪˈmeɪnɪŋ/

remaining

残り
Meaning
still existing or left after others are gone or dealt with
Example
There were only a few remaining tickets for the concert.
コンサートのチケットは残りわずかでした。
C2 adjective /rɪˈmjuːnərətɪv/

remunerative

利益がある
Meaning
Financially rewarding or profitable.
Example
He chose a remunerative career in medicine.
彼は医学の中で利益のあるキャリアを選びました。
B2 noun /ˌrɪəlɪˈzeɪʃən/

realization

実現
Meaning
the act of becoming fully aware of something as a fact
Example
Her realization of the problem helped solve the issue.
彼女の問題の認識が問題解決に役立った。
C1 adjective /ˈruːfəl/

rueful

後悔した
Meaning
Expressing sorrow, regret, or pity.
Example
He gave a rueful smile after losing the match.
試合に負けた後、彼は後悔の笑顔を見せた。
B2 noun /ˈreɪʃoʊ/

ratio

比率
Meaning
a relationship between two numbers showing how many times the first number contains the second
Example
The ratio of boys to girls in the class is 2:1.
クラスでの男の子と女の子の比率は2:1です。
B1 noun roʊps

ropes

ロープ
Meaning
A length of thick strong cord made by twisting together strands of hemp, sisal, nylon, or similar material.
Example
The ropes were tied securely to lift the heavy load.
ロープは重い荷物を持ち上げるためにしっかりと結ばれていました。
B2 verb /ˈraɪpən/

ripen

幸せ
Meaning
to become or make something ready to eat or fully developed
Example
The bananas ripened quickly in the warm weather.
彼女は賞を受け取ったとき、幸せを隠せなかった。
C1 verb /ˌriːˈvæmp/

revamp

改装
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.
その企業は、モダンな外観のためにウェブサイトをリヴァンプすることを決定しました。
A2 adverb /ˈrɛɡjələrli/

regularly

定期的に
Meaning
at regular intervals; in a regular manner
Example
She exercises regularly to stay healthy.
彼女は健康を保つために定期的に運動します。
C1 noun /ˈrep.lɪ.kə/

Replica

レプリカ
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.
博物館は古代の彫像の完璧なレプリカを展示しました。
C2 noun /red ˌəʊ.liˈæn.dər/

Red oleander

赤いオリンダー
Meaning
a poisonous flowering shrub with bright red or pink flowers
Example
The red oleander blooms throughout the summer months.
赤いオリンダーは夏の数ヶ月間咲きます。
A2 verb /rɪˈkwaɪər/

require

必要とする
Meaning
to need something; to demand or insist on
Example
This job requires excellent communication skills.
この仕事には優れたコミュニケーションスキルが必要です。
B1 noun /ˈrɪðəm/

rhythm

リズム
Meaning
a strong, regular, repeated pattern of movement or sound
Example
The rhythm of the music made everyone want to dance.
音楽のリズムはみんなを踊りたくさせた。
C2 adjective /rɪˈfrɪndʒənt/

refringent

屈折性
Meaning
Capable of refracting light or other waves.
Example
The refringent properties of the crystal bent the light into a spectrum.
結晶の屈折性の特性は光をスペクトルに曲げました。
C2 adjective /ˈrævənɪŋ/

ravening

非常に空腹で貪欲
Meaning
Extremely hungry and greedy; voracious.
Example
The ravening wolves circled the camp.
空腹の狼たちはキャンプを囲んだ。
A1 noun /ˈrɪv.ər/

River

川
Meaning
a large natural stream of water flowing in a channel to the sea, a lake, or another river
Example
The river flows through the valley and into the ocean.
川は谷を流れ、海に注ぎ込む。
C1 adjective /ˈrɛzənənt/

resonant

響く
Meaning
Deep, clear, and continuing to sound or echo.
Example
The resonant voice of the speaker filled the hall.
スピーカーの響く声がホールに響き渡った。
C1 noun ˈredʒ.ɪ.strɑːr

registrar

レジストラー
Meaning
An official responsible for keeping records or registers.
Example
The registrar oversees all administrative tasks.
レジストラーはすべての行政業務を監督しています。
C2 noun /ˌriːkruːˈdɛsəns/

recrudescence

再発
Meaning
a new outbreak or revival of something that had subsided, especially an undesirable condition
Example
Health officials warned of a recrudescence of measles in several districts.
保健当局は複数の地区で麻疹の再発の警告を出しました。
B2 noun rɪˈsɛʃ.ən

recession

景気後退
Meaning
A period of temporary economic decline during which trade and industrial activity are reduced.
Example
The country faced a severe recession due to the financial crisis.
その国は金融危機のため深刻な景気後退に直面した。
B2 verb /ˌriːkriˈeɪt/

recreate

再創造する
Meaning
to create or produce something again, especially a new version of something lost or destroyed
Example
The team recreated the lost dataset from backups.
チームはバックアップから失われたデータセットを再作成しました。
C1 adjective /rɪˈzɪdjuəl/

residual

残余
Meaning
Remaining after the greater part has gone.
Example
The patient experienced residual pain after the surgery.
患者は手術後に残余の痛みを感じました。
C1 noun /ˈraɪtʃəsnəs/

righteousness

正義
Meaning
the quality of being morally right or justifiable
Example
His life was dedicated to righteousness and truth.
彼の人生は正義と真実に捧げられた。
C1 verb /ˈrɛzəneɪt/

resonate

共鳴する
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.
彼女の言葉は聴衆に響いた。
C1 adjective /ˈræspi/

raspy

ハスキー
Meaning
having a harsh, rough, or grating sound
Example
His raspy voice revealed years of smoking.
彼のハスキーな声は喫煙の年数を明らかにした。
C1 verb /ˈreɪdieɪt/

radiate

放射する
Meaning
to emit energy or light; to spread out from a center
Example
The fireplace radiates warmth throughout the room.
暖炉は部屋全体に暖かさを放射します。
C1 adjective /ˈrɛvərənt/

reverent

敬虔な
Meaning
Showing deep and solemn respect.
Example
They listened to the speech in a reverent silence.
彼らは敬虔な沈黙の中でスピーチを聞いた。
B2 noun rɪˈzentmənt

resentment

憤り
Meaning
Bitter indignation at having been treated unfairly.
Example
Resentment grew among the students.
学生の間で憤りが増大した。
C2 noun /rɪˈmɒnstrəns/

remonstrance

抗議
Meaning
A forceful protest or objection.
Example
The workers’ remonstrance against unfair treatment was ignored.
労働者たちの不公平な扱いに対する抗議は無視された。
C1 verb /ˈrɛlɪɡeɪt/

relegate

降格する
Meaning
to assign to a lower rank, position, or category
Example
The manager decided to relegate the player to the bench.
マネージャーは選手をベンチにレリゲートすることを決定しました。
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.
B2 noun /rɛlm/

realm

Meaning
A kingdom or domain; a field or area of activity or interest.
Example
He is well known in the realm of science.
A1 adjective /ˈreɪ.di.əʊ/

radio

ラジオ
Meaning
Relating to radio waves or broadcasting.
Example
FAST is the largest radio telescope in the world.
FASTは世界最大のラジオ望遠鏡です。
C2 noun /rɪˈvaɪ.zəl/

revisal

改訂
Meaning
The act of revising, reviewing, or making changes to something.
Example
The revisal of the contract took longer than expected.
契約の改訂には予想以上の時間がかかりました。
C2 noun /ˈræŋ.kər/

rancor

憎しみ
Meaning
A feeling of deep and bitter anger or resentment.
Example
There was a rancor between the two rivals that never faded.
二人のライバルの間には、決して消えることのない憎しみがあった。
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 /rɪˈsɜː.dʒəns/

resurgence

再生
Meaning
An increase or revival after a period of little activity, popularity, or occurrence.
Example
The city saw a resurgence in tourism after the pandemic.
都市はパンデミック後、観光業の再生を見ました。
A1 verb /raɪd/

ride

乗る/ライディング
Meaning
to travel on or in a vehicle; to sit on and control a horse
Example
She likes to ride her bicycle to work.
彼女は自転車で仕事に行くのが好きです。
B2 noun, verb, adjective /ræŋk/

rank

ランク
Meaning
A position in a hierarchy; to place in order according to importance or quality.
Example
She quickly rose to a senior rank in the company.
彼女は会社で素早く上級ランクに昇進しました。
B2 noun /rɪˈzembləns/

Resemblance

類似
Meaning
the state of being alike or similar; similarity in appearance or character
Example
There's a strong resemblance between the two sisters.
二人の姉妹の間には強い類似があります。
C2 noun /ruːˈeɪ/

roue

感覚的な楽しみを追い求める男
Meaning
A man devoted to a life of sensual pleasure; a debauched man.
Example
The old roue squandered his fortune on gambling and women.
年老いたルーエはギャンブルと女性に財産を浪費した。
B2 noun /ˈreɪ.dɑːr/

Radar

レーダー
Meaning
a system for detecting the presence, direction, distance of aircraft, ships by sending out radio waves
Example
The radar detected an unknown aircraft approaching the base.
レーダーは基地に接近する未知の航空機を検出しました。
B2 adjective /rɪˈzɪl.i.ənt/

resilient

回復力のある
Meaning
Able to withstand or recover quickly from difficult conditions.
Example
Resilient materials ensure durability.
回復力のある素材は耐久性を保証します。
A1 noun, adjective, adverb /raɪt/

right

権利
Meaning
something that is morally good, fair, or just; or a legal/entitled claim
Example
Everyone has the right to free speech.
誰もが自由な言論の権利を持っています。
C2 verb /ˈræpsəˌdaɪz/

rhapsodize

熱狂的に話す
Meaning
to speak or write with great enthusiasm and admiration
Example
He would often rhapsodize about his travels to Europe.
彼はよくヨーロッパ旅行について熱心に話していた。
C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

後退
Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
国は危機後、経済的な後退を経験しました。
A2 verb riˈsaɪklɪŋ

recycling

リサイクリング
Meaning
The process of converting waste materials into new materials and objects to prevent waste.
Example
Recycling plastic helps in reducing waste.
プラスチックのリサイクリングは、廃棄物の削減に役立ちます。
B2 noun/verb /rɪˈmɑːrk/

remark

発言
Meaning
something that is said; a comment
Example
She made a remark about the weather.
彼女は天気について発言した。
B2 noun /rɪˈlaɪ.əns/

Reliance

依存
Meaning
the state of depending on something or someone for support or help
Example
His reliance on technology is concerning.
技術への依存は懸念すべきことです。
B2 adjective /ˈreɪsɪst/

racist

人種差別主義者
Meaning
showing or feeling discrimination or prejudice against people of other races
Example
He was accused of making racist comments.
彼は人種差別的なコメントをしたとして非難された。
B2 noun /rɪˈfɔːr.mər/

Reformer

改革者
Meaning
a person who works to bring about positive changes in society or institutions
Example
The social reformer dedicated her life to improving education for all children.
社会的な改革者は、すべての子供たちの教育を改善するために自分の人生を捧げました。
C1 adjective /rɪˈɡrɛtfəl/

regretful

後悔している
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.
彼女は振り返りながら後悔している笑顔を彼に向けた。
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

偵察する
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.
兵士たちは進軍する前にその地域を偵察しました。
C1 noun /ˈruːbrɪk/

rubric

評価基準 / 指針
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.
教師は課題のための評価基準を提供しました。
B2 noun /rɪˈfjuː.zəl/

Refusal

拒否; 拒絶
Meaning
the act of saying no to something or not accepting something
Example
His refusal to cooperate made the project more difficult.
彼の協力拒否はプロジェクトをさらに難しくした。
A2 verb /rɪˈpiːt/

repeat

繰り返す
Meaning
to say or do something again
Example
Could you please repeat what you just said?
今言ったことを繰り返してくれますか？
C1 adjective /ˈreɪ.si/

racy

刺激的
Meaning
Lively, entertaining, or slightly shocking (especially in a sexual way).
Example
The novel was full of racy dialogues.
その小説は刺激的な対話で満ちていた。
C1 adjective /ˈræb.ɪd/

rabid

狂信的
Meaning
Having extreme or fanatical support for something; relating to or suffering from rabies.
Example
He was a rabid fan of the football team.
彼はサッカーチームの狂信的なファンだった。
C2 adjective /ˈreɪ.moʊs/

ramose

分岐した
Meaning
having many branches.
Example
The ramose tree shaded the entire garden.
その分岐した木は庭全体に日陰を提供しました。
C2 noun /ˈrɛtɪnjuː/

retinue

従者
Meaning
A group of attendants or followers accompanying an important person.
Example
The king entered the hall followed by his retinue.
王は従者を引き連れてホールに入った。
C2 noun /rɪˈfrækʃən/

refraction

屈折
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.
水中の光の屈折により、物体が曲がって見えます。
C1 noun /ˈreɪdiəns/

radiance

輝き
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.
良いニュースを聞いた後、彼女の顔は輝きで満ちていました。
C2 noun /ˈrɛkluːsəri/

reclusory

隠遁場所
Meaning
A place for seclusion or retreat, especially for a recluse or hermit.
Example
The monk spent years in the reclusory away from society.
その僧侶は社会から離れた隠遁場所で数年を過ごしました。
B2 verb /rɪˈnuː/

renew

Meaning
to make something new again or extend its period of validity
Example
I need to renew my passport before traveling.
B2 noun /ˈruːmər/

rumor

噂
Meaning
a currently circulating story or report of uncertain or doubtful truth.
Example
There’s a rumor that the company will merge next year.
来年、会社が合併するという噂があります。
C1 noun /roʊt/

rote

暗記
Meaning
mechanical or habitual repetition, often without understanding
Example
He learned the poem by rote without understanding its meaning.
彼はその詩を意味を理解せずに暗記しました。
A2 noun /ˈriː.zənz/

reasons

理由
Meaning
Causes, explanations, or justifications for an action or event.
Example
Reasons for pollution need addressing urgently.
汚染の理由は緊急に対処する必要があります。
B2 verb /rɪˈtriːv/

retrieve

取り戻す
Meaning
to get something back that was lost or taken; to recover
Example
She managed to retrieve her lost phone from the taxi.
彼女はタクシーから失われた電話を取り戻すことができました。
A2 adjective /ˈrʌʃən/

russian

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

Remainder

残り; 余り
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.
残りの食べ物は冷蔵庫に保存されました。
B1 noun /rɪˈkʌvəri/

recovery

回復
Meaning
the process of recovering or returning to a normal state
Example
The patient is in recovery after the surgery.
患者は手術後、回復中です。
B2 verb /rɪˈɡeɪn/

regain

回復する
Meaning
to get back something that was lost; to recover
Example
He regains his strength after the illness.
彼は病気の後、力を回復する。
C1 verb /rɒmp/

romp

楽しく遊ぶ
Meaning
to play or move in a lively, carefree, and energetic way
Example
The children romped happily in the garden.
子供たちは庭で楽しそうに遊んでいました。
C2 verb /rɪˈtrɛntʃ/

retrench

コスト削減、従業員の解雇
Meaning
to reduce costs, spending, or staff to save resources
Example
The company had to retrench employees due to financial difficulties.
会社は財政的な困難のため、従業員をリトレンチしなければならなかった。
C1 noun /ˈrɛɡjəleɪtər/

regulator

調整装置
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.
政府は金融セクターの新しい規制機関を任命した。
C2 noun /ˈræɡəmʌfɪn/

ragamuffin

ぼろぼろの子供
Meaning
A person, typically a child, in ragged, dirty clothes.
Example
The little ragamuffin begged for food on the street.
小さなぼろぼろの子供が通りで食べ物を求めていた。
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.
B1 adverb /rɪˈpiː.tɪd.li/

Repeatedly

繰り返し; 何度も
Meaning
again and again; many times over
Example
He repeatedly asked for help with his homework.
彼は宿題について何度も助けを求めました。
C2 noun /ˈræʃənəlɪzəm/

rationalism

合理主義
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.
合理主義は信仰よりも論理と推論を強調します。
B2 adjective rəʊˈbʌst

robust

ロバスト
Meaning
Strong and healthy; vigorous; able to withstand or overcome adverse conditions.
Example
The robust infrastructure ensures reliable communication.
ロバストなインフラは信頼できる通信を保証します。
C1 adjective rɪˈlɛntləs

relentless

容赦ない
Meaning
Oppressively constant; incessant; showing no abatement of severity, intensity, strength, or pace.
Example
The freedom fighters' relentless struggle led to victory.
自由戦士たちの容赦ない戦いは勝利へと導いた。
C2 adjective /ˈrɪbɔːld/

ribald

下品な冗談
Meaning
Referring to sexual matters in a humorous or vulgar way.
Example
The comedian’s ribald jokes made the audience laugh uncomfortably.
コメディアンの下品な冗談は観客を不快にさせながら笑わせた。
C1 noun ˌriː.pɚˈkʌʃ.ənz

repercussions

影響
Meaning
The unintended consequences or effects of an action or event.
Example
The new policy had unintended repercussions on the economy.
新しい政策は経済に予期しない影響を与えました。
C2 adjective /rɪˈprɛsəbl̩/

repressible

抑制可能
Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
その運動はほとんど抑制可能であることが証明されました。
C1 noun /rɑk sɔlt/

Rock Salt

岩塩
Meaning
natural salt crystals formed from evaporated ancient seas; unrefined salt
Example
Rock salt is considered healthier than table salt.
岩塩はテーブルソルトよりも健康的だと考えられています。
C2 verb /rɪˈpaɪn/

repine

嘆く
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.
彼女は不幸を嘆かず、より一生懸命に働いて生活を向上させました。
C2 verb /ˌriːkruːˈdɛs/

recrudesce

再発
Meaning
to break out or appear again after a period of dormancy or decline
Example
After months of calm, violence recrudesced in the region.
数ヶ月の静けさの後、暴力が再発しました地域で。
B2 noun /ˈreɪtɪŋ/

rating

評価
Meaning
an evaluation or assessment, usually numerical
Example
The movie received a high rating from critics.
その映画は批評家から高い評価を受けました。
C2 noun /ˈrɒndoʊ/

rondo

音楽作品（繰り返しのテーマを持つ）
Meaning
a musical composition with a recurring leading theme
Example
The pianist ended the recital with a lively rondo.
ピアニストは生き生きとしたロンドでリサイタルを終えました。