risk factor
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B2 noun rɪsk ˈfæktər

risk factor

リスク要因
Meaning
Something that increases the likelihood of developing a disease or condition
Example
Water pollution is a significant risk factor for health.
水質汚染は健康にとって重要なリスク要因です。
A2 verb /riːˈsaɪ.kəl/

recycle

リサイクル
Meaning
to process used materials so they can be used again instead of being thrown away
Example
We should recycle paper and plastic to reduce waste.
私たちは廃棄物を減らすために紙とプラスチックをリサイクルするべきです。
B1 noun /ˈref.ər.əns/

Reference

参考文献
Meaning
the action of mentioning or alluding to something; a source of information
Example
Please provide references to support your research claims.
研究の主張を支持するために参考文献を提供してください。
C1 adjective /rɪˈzɪstɪv/

resistive

抵抗性
Meaning
tending to resist or oppose; in physics, relating to electrical resistance
Example
The material has resistive properties that slow down current flow.
その材料は、電流の流れを遅くする抵抗性の特性を持っています。
C1 verb /ˌriːɪnˈtɪɡreɪt/

reintegrate

再統合する
Meaning
To bring someone or something back into a group or society after being separated.
Example
The program helps prisoners reintegrate into society.
そのプログラムは囚人が社会に再統合するのを助けます。
C2 adjective /roʊˈtʌnd/

rotund

丸い
Meaning
round or plump in shape; full in sound
Example
The rotund cat struggled to climb the fence.
丸い猫はフェンスを登るのに苦労していた。
C1 noun /rɪft/

rift

亀裂
Meaning
a serious break in a relationship; a split or crack
Example
A rift developed between the two friends after the argument.
議論の後、二人の友達の間に亀裂が生じた。
C1 noun /rɪˈliːf treɪn/

Relief Train

救援列車
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.
救援列車は洪水の被害者のために食料と医療物資を運んできました。
B1 noun rɪˈsɜː.tʃəz

researchers

研究者
Meaning
People who study and investigate to discover new information or facts.
Example
Researchers are working on innovative solutions.
研究者たちは革新的な解決策に取り組んでいます。
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 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。
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.
C1 noun ˌriːˌvaɪ.təl.aɪˈzeɪ.ʃən

revitalization

再生
Meaning
The action of giving new life and vitality to something.
Example
Proper rest and nutrition lead to revitalization of the body.
適切な休息と栄養は体のリバイタライゼーションに繋がります。
C1 verb /rɪˈdrɛs/

redress

是正する
Meaning
to set right, remedy, or compensate for a wrong or grievance
Example
The company promised to redress the complaints of its customers.
その会社は顧客の苦情を是正すると約束しました。
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。
C1 verb /ˌriːˈmɒdəl/

remodel

改装する
Meaning
To change the structure or form of something, especially a building.
Example
They decided to remodel their kitchen last summer.
彼らは昨年の夏にキッチンをリモデルすることに決めました。
C2 noun /rɪˈpʌɡ.nəns/

repugnance

嫌悪
Meaning
intense disgust or strong aversion towards something
Example
She felt deep repugnance at the cruelty of the act.
彼女はその行為の残酷さに深い嫌悪を感じた。
C1 noun /ˈræmpɑːrt/

rampart

城壁
Meaning
a defensive wall of a castle or fort
Example
The soldiers stood on the rampart, watching the enemy approach.
兵士たちは城壁に立ち、敵が近づくのを見守っていました。
B2 adjective rɪˈnaʊnd

renowned

著名
Meaning
Known or talked about by many people; famous.
Example
The renowned scientist led the reform panel.
その著名な科学者は改革パネルを指導しました。
C2 verb /ˈrɔɪstər/

roister

大声で祝い
Meaning
to revel noisily; to engage in loud, boisterous celebration
Example
The fans roistered in the streets after the victory.
ファンは勝利後に街で騒いでいました。
A2 noun /ræt/

Rat

ネズミ
Meaning
a large long-tailed rodent that is typically considered a pest
Example
The rat scurried across the kitchen floor.
ネズミは台所の床を走り抜けました。
C1 adjective /rɪˈtæl.i.ə.tɔːr.i/

retaliatory

報復的
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.
その国は貿易制裁に対して報復的な関税を課しました。
C1 adjective /ˈreɡ.jʊ.lə.tər.i/

Regulatory

規制
Meaning
Having the power to control or govern something through rules and regulations.
Example
The government enforces regulatory policies for financial stability.
政府は金融安定性のために規制政策を実施しています。
B2 verb /ˌriːprəˈdjuːs/

reproduce

再生する, 繁殖する
Meaning
To make a copy of something; to generate offspring.
Example
Many animals reproduce rapidly in favorable conditions.
多くの動物は好ましい条件下で急速に繁殖します。
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。
B2 noun /red liːf/

Red leaf

赤い葉
Meaning
red-colored leafy vegetable; amaranth leaves used as greens
Example
Red leaf is rich in iron and is commonly eaten in Bengali households.
赤い葉は鉄分が豊富で、ベンガルの家庭でよく食べられます。
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。
A2 verb /riːtʃ/

reach

到達する
Meaning
to arrive at a destination; to extend one's arm to touch something
Example
We will reach the station in ten minutes.
私たちは10分以内に駅に到着します。
A1 adverb /ˈriː.ə.li/

Really

本当に; 実際に; とても
Meaning
actually; truly; very much
Example
I really enjoyed the concert last night.
昨晩のコンサートは本当に楽しめました。
C1 adjective /ˈroʊtəri/

rotary

回転式
Meaning
Relating to or characterized by rotation; revolving around an axis.
Example
The machine uses a rotary engine to function efficiently.
その機械は効率的に動作するためにロータリーエンジンを使用しています。
C1 verb /ˌriːˈkæl.ɪ.breɪt/

recalibrate

再調整する, 調整し直す
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.
会社は市場に適応するために戦略を再調整する必要があった。
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。
C1 verb /rɪˈdʒuː.vɪ.neɪt/

rejuvenate

再生する
Meaning
To make or feel young, healthy, or energetic again.
Example
A vacation can rejuvenate the mind and body.
休暇は心と体を再生させることができます。
C1 adjective /ˈrɛtroʊˌɡreɪd/

retrograde

後退的
Meaning
moving backward or returning to a worse condition
Example
The policy was seen as a retrograde step for human rights.
その政策は人権に対する後退的な一歩と見なされた。
B1 noun /raɪs ˈkʊkər/

Rice cooker

電気炊飯器
Meaning
an electric appliance designed to cook rice automatically
Example
The rice cooker automatically switches off when the rice is perfectly cooked.
ライスクッカーはご飯が完璧に炊けると自動でオフになります。
C1 adjective /ˈrɛtɪsənt/

reticent

控えめ
Meaning
not revealing one's thoughts or feelings readily; reserved
Example
She was reticent about her personal life.
彼女は自分の個人的な生活について控えめでした。
B2 noun /rɪˈvaɪ.vəl/

Revival

復活
Meaning
an improvement in the condition or strength of something; renewed interest in or attention to something
Example
There has been a revival of interest in traditional crafts.
伝統的な工芸への関心が復活しました。
C1 phrase ˈriː.dʒən.əl ˈfɔː.rəm

regional forum

地域フォーラム
Meaning
A meeting or conference where representatives from countries or organizations in a specific geographical area discuss issues of common interest.
Example
The Regional Forum discussed deforestation impacts.
地域フォーラムでは、森林伐採の影響について議論されました。
B2 noun /ˈrʊki/

rookie

初心者
Meaning
a person who is new to an activity or organization; a beginner
Example
The rookie policeman made a few mistakes on his first day.
新米警官は初日にいくつかのミスを犯しました。
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 adjective /ˈrɛɡnənt/

regnant

統治している
Meaning
Reigning; currently holding power, authority, or dominance.
Example
The regnant queen introduced several reforms during her reign.
統治している女王は、彼女の統治期間中にいくつかの改革を導入しました。
B2 noun /ˈroʊ.lɪŋ pɪn/

Rolling pin

めん棒
Meaning
a cylindrical tool used for rolling out dough or pastry
Example
Roll the dough flat with a rolling pin.
めん棒で生地を広げてください。
C1 noun /ˈrɛtɪsəns/

reticence

沈黙
Meaning
the quality of being reserved or unwilling to speak freely
Example
His reticence made it difficult to know what he was thinking.
彼の沈黙は、彼が何を考えているのかを知るのを難しくしました。
B2 noun/verb /ræft/

raft

筏
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.
彼らは川を渡るために筏を作った。
B1 adjective, noun /ˈroʊmən/

roman

ローマの / 古代ローマの市民
Meaning
relating to Rome or its people; a citizen of ancient Rome
Example
The Roman Empire influenced much of modern civilization.
ローマ帝国は現代文明に多大な影響を与えました。
C1 verb /rɪˈbʌt/

rebut

反論する
Meaning
to argue against or prove wrong; to refute
Example
The lawyer rebutted the false accusations with strong evidence.
弁護士は強力な証拠で虚偽の告発を反論しました。
B1 adjective /ˌriːəˈlɪstɪk/

realistic

現実的
Meaning
having or showing a sensible and practical idea of what can be achieved or expected
Example
She gave a realistic estimate of the project's cost.
彼女はプロジェクトのコストの現実的な見積もりを出した。
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。
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.
B1 noun /rɪˈkɔːdɪŋ/

recording

録音
Meaning
the act or process of recording something
Example
The recording of the interview was clear and loud.
インタビューの録音は明瞭で大きかった。
A2 noun /ruːl/

rule

規則
Meaning
an accepted principle or instruction that states what is allowed or what must be done.
Example
There are strict rules about safety in the lab.
実験室には安全に関する厳しい規則があります。
B2 noun, verb /ˈrætəl/

rattle

ガタガタ鳴る；ガラガラ
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.
強い風で緩んだ窓がガタガタ鳴り始めた。
B2 adjective /ˈrɪdʒ.ɪd/

Rigid

硬直
Meaning
hard and stiff; not able to bend; strict and unwilling to change
Example
The company has a rigid dress code that all employees must follow.
会社にはすべての従業員が従う必要がある厳格なドレスコードがあります。
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 adjective /rɪˈtaɪərɪŋ/

retiring

内向的
Meaning
Shy and reserved; avoiding social contact.
Example
She is a quiet, retiring woman who avoids attention.
彼女は静かで内向的な女性で、注目を避ける。
B2 verb /rɪˈfreɪn/

refrain

控える
Meaning
To hold oneself back from doing something.
Example
Please refrain from smoking in this area.
このエリアでの喫煙はご遠慮ください。
C1 adjective, noun /rɪˈsiːvəbl/

receivable

回収可能
Meaning
Money that is owed to a company and is expected to be paid.
Example
The company's receivables increased significantly this quarter.
会社の売掛金は今四半期に大幅に増加しました。
C2 adjective /rɪˈtɪkjʊlət/

reticulate

網状
Meaning
Having a net-like pattern or structure.
Example
The leaf had a reticulate pattern of veins.
葉は網目模様の静脈がありました。
B1 verb /rɪˈɡɑːrd/

regard

考える
Meaning
to consider or think of in a particular way; to look at
Example
She regards him as her best friend.
彼女は彼を親友として考えている。
B1 adjective /rɪˈlɪdʒəs/

Religious

宗教的; 信心深い; 精神的; 宗教に関連する;
Meaning
relating to or believing in a religion; devout; spiritual;
Example
He comes from a very religious family.
彼は非常に宗教的な家庭から来ています。
A2 noun /ˈriːdɪŋ/

reading

読書
Meaning
the action or skill of reading
Example
Reading is one of my favorite hobbies.
読書は私の好きな趣味の一つです。
B1 verb /rɪˈliːs/

release

解放する
Meaning
to set free; to allow something to escape or go away
Example
The prisoner was released after ten years.
囚人は10年後に解放されました。
C2 verb /rɪˈkwaɪt/

requite

返す
Meaning
to return or repay a favor, service, or feeling
Example
She requited his kindness with a thoughtful gift.
彼女は彼の親切に思慮深い贈り物で報いました。
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 /ˌret.rəˈspek.tɪv/

Retrospective

回顧的な
Meaning
looking back on or dealing with past events or situations
Example
The museum held a retrospective exhibition of the artist's work.
美術館はその画家の作品の回顧展を開催した。
C2 noun /ˈræp.aɪn/

rapine

略奪
Meaning
the violent seizure of someone's property
Example
The war was marked by rapine and destruction.
戦争は略奪と破壊で特徴づけられていた。
B2 adjective /ˈræp.ɪd/

Rapid

迅速な；急速な；素早い；
Meaning
happening in a short time or at a fast pace
Example
The rapid growth of technology has changed our daily lives.
テクノロジーの急速な成長は私たちの日常生活を変えました。
B1 verb /riˈækt/

react

反応する
Meaning
to respond or behave in a particular way to something
Example
She reacted angrily when she heard the news.
彼女はニュースを聞いて怒って反応した。
C1 noun /raɪt/

rite

儀式
Meaning
a religious or ceremonial act
Example
The wedding rite was performed with great solemnity.
結婚式の儀式は厳粛に行われました。
C1 verb /ˌriːˈkɒn.stɪ.tʃuːt/

reconstitute

再構成する
Meaning
to restore something to its original form or state; to reassemble
Example
The group was reconstituted after the leader returned.
リーダーが戻った後、グループは再構成されました。
C2 adjective /rɪˈflɛktɪbəl/

reflectible

反射可能
Meaning
capable of being reflected, as light or an image
Example
The surface of the lake is highly reflectible in the morning sun.
湖の表面は朝の太陽の下で非常に反射可能です。
C1 verb /rɪˈpjuː.di.eɪt/

repudiate

否定する
Meaning
to refuse to accept, recognize, or support something
Example
He repudiated the claim that he was involved in the scandal.
彼はそのスキャンダルに関与していたという主張を否定しました。
C2 noun /ˈrɛv.ər.i/

reverie

白昼の夢; 夢想
Meaning
A state of being pleasantly lost in one's thoughts; a daydream.
Example
Lost in reverie, he didn't hear his name being called.
夢想にふけっているため、彼は名前が呼ばれるのを聞かなかった。
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。
B1 noun riˈækʃən

reaction

反応
Meaning
An action performed or a feeling experienced in response to a situation or event.
Example
The arrests triggered a reaction.
逮捕は反応を引き起こしました。
B2 noun /ˈrɔɪəlti/

royalty

王族 / ロイヤリティ (著者の収入)
Meaning
Members of a royal family or payment made to the owner of a patent, copyright, or natural resource.
Example
The author receives a royalty for every book sold.
著者は売れた本ごとにロイヤリティを受け取ります。
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 adjective /ˈruːbɪkənd/

rubicund

健康的な赤みを帯びた顔
Meaning
Having a healthy reddish complexion.
Example
The old man’s rubicund face showed he was in good health.
その老人の赤みを帯びた顔は、彼が健康であることを示していた。
C1 noun /rɪˈbʌtəl/

rebuttal

反論
Meaning
a statement or argument made to oppose or disprove another
Example
Her rebuttal was clear and convincing.
彼女の反論は明確で説得力がありました。
B1 noun /roʊp/

rope

ロープ
Meaning
a strong, thick cord made of twisted fibers or strands
Example
The climbers used a rope to scale the mountain.
登山者は山を登るためにロープを使いました。
B2 verb /reɪn/

reign

統治する
Meaning
to rule as a king or queen; to be dominant
Example
The queen reigned for over sixty years.
女王は60年以上統治していました。
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。
A2 noun /ˈrɛsɪpi/

recipe

レシピ
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.
チョコレートケーキの素晴らしいレシピを見つけました。
B1 noun /ˌrɛdʒɪˈstreɪʃən/

registration

登録
Meaning
the action or process of enrolling or signing up for something
Example
The registration for the event will close tomorrow.
イベントの登録は明日締め切りです。
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。
B2 verb /ˈroʊ.teɪt/

rotate

回転する
Meaning
to turn around a central point or axis
Example
The Earth rotates on its axis once every 24 hours.
地球は24時間ごとに自転します。
B1 noun /ˌrɛzəˈluːʃən/

resolution

解決, 決議
Meaning
The action of solving a problem, dispute, or contentious matter.
Example
The resolution of the issue requires careful planning and action.
問題の解決には慎重な計画と行動が必要です。
B2 noun /ˈraɪvəlri/

Rivalry

ライバル関係; 競争
Meaning
competition for the same objective or for superiority in the same field; the state of being rivals
Example
The rivalry between the two teams made the match exciting.
二つのチーム間のライバル関係が試合を興奮させた。
B2 noun /ˈreb.əl/

Rebel

反逆者
Meaning
a person who resists authority or control
Example
The young rebel refused to follow the school rules.
その若い反逆者は学校の規則に従うことを拒否した。
B2 verb /ræm/

ram

Meaning
to strike or push something with great force
Example
The truck rammed into the wall.
B1 adjective /ˈrɔɪ.əl/

Royal

ロイヤル
Meaning
belonging to or connected with the monarch or monarchy; magnificent; excellent
Example
The royal family attended the ceremony.
ロイヤルファミリーが式典に出席しました。
B2 noun /ˌrɛprɪzɛnˈteɪʃən/

representation

代表
Meaning
the action of speaking or acting on behalf of someone or something
Example
Her representation of the team was impeccable.
彼女のチームの代表は完璧でした。
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。
C1 noun /rɪˈspɒndənt/

respondent

回答者
Meaning
A person who replies to something, especially in a survey or legal case
Example
The survey had over 1,000 respondents.
調査には1000人以上の回答者がいました。
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。
A2 adverb /ˈrɛə(r)li/

rarely

めったに
Meaning
not often, infrequently
Example
She rarely eats sweets because of her diet.
彼女はダイエットのため、お菓子をめったに食べません。
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 noun /ˈrerəti/

Rarity

珍しい状態; 普通でないもの、または希少なもの
Meaning
the state of being rare; something that is uncommon or scarce
Example
The antique vase was a rarity worth thousands of dollars.
その古代の花瓶は、数千ドルの価値がある珍しいものだった。
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。
A2 adjective /ˈreɪ.ni/

Rainy

雨の日の
Meaning
characterized by rain; wet from rain; having much rain
Example
It was a rainy day, so we stayed indoors.
今日は雨の日だったので、家の中にいました。
B2 adjective /rɪˈfaɪnd/

Refined

洗練された; 精製された
Meaning
elegant and cultured in appearance, manner, or taste; purified
Example
She has very refined taste in art and music.
彼女は芸術と音楽に非常に洗練された趣味を持っています。
C1 adjective /ˈrænsɪd/

rancid

腐った
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.
バターは外に長時間置かれて腐ってしまった。
C1 verb /rɪˈtɔːrt/

retort

反論
Meaning
To reply quickly or sharply, often in a witty or angry manner.
Example
He quickly retorted that he was not to blame.
彼は素早く反論した、彼が悪くないと言った。
B1 noun /ruːt/

route

Meaning
a way or course taken to get from one place to another
Example
The best route to the airport is through the highway.
B2 noun, verb /rɪˈzɔːrt/

resort

リゾート / 最後の手段
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.
彼らは休暇中にビーチリゾートに滞在しました。
B1 noun /ruːˈtiːn/

routine

ルーチン, 習慣, 固定された順序
Meaning
A sequence of actions regularly followed; a fixed program.
Example
A well-structured routine improves productivity.
よく構造化されたルーチンは生産性を向上させます。
B1 noun /roʊˈmæns/

Romance

ロマンス
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.
彼らの恋愛は、大学の図書館で出会ったときに始まった。
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。
C1 noun /rɪˈpreʃən/

Repression

抑圧
Meaning
the action of subduing someone or something by force; the restraint, prevention, or inhibition of a feeling, impulse, etc.
Example
The government's repression of free speech sparked widespread protests.
政府の表現の自由に対する抑圧は、広範な抗議を引き起こした。
B2 noun /ˈrækɪt/

racket

ラケット / 騒音
Meaning
A piece of equipment used to hit the ball in sports like tennis or badminton; also a loud noise or an illegal scheme.
Example
He bought a new tennis racket for the match.
彼は試合のために新しいテニスラケットを買った。
B2 noun /'ræd.ɪʃ/

Radish

ラディッシュ
Meaning
a small pungent edible root vegetable with white or red skin
Example
The farmer harvested fresh radishes from the garden.
農家は庭から新鮮なラディッシュを収穫しました。
C1 verb /rɪˈsiːd/

recede

後退する
Meaning
To move back or further away from a previous position.
Example
The floodwaters began to recede after the heavy rain stopped.
激しい雨が止んだ後、洪水は後退し始めました。
C1 noun /ˈrɪɡər/

rigor

厳格さ
Meaning
strictness, severity, or demanding conditions
Example
The training was carried out with great rigor.
訓練は大変厳格に行われました。
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。
C1 noun /ˈroʊdənt/

rodent

齧歯類
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.
農場主は納屋の中でロデントを捕まえるために罠を設置しました。
C2 noun /ˈrɛk.tɪ.tjuːd/

rectitude

誠実
Meaning
Morally correct behavior or thinking; righteousness and integrity.
Example
His rectitude earned him respect in society.
彼の誠実さは社会で尊敬を得た。
C2 adjective /ræpˈtɔːriəl/

raptorial

肉食鳥
Meaning
Relating to birds of prey or predatory behavior.
Example
The eagle is a raptorial bird with sharp talons.
ワシは鋭い爪を持つ肉食鳥です。
B1 noun /rɪˈzɔː.sɪz/

resources

資源
Meaning
A stock or supply of money, materials, staff, and other assets.
Example
The region was rich in herbal resources.
その地域は薬草の資源が豊富でした。
B2 verb /reɪl/

rail

抗議する
Meaning
to complain or protest strongly about something
Example
He railed against the unfair decision.
彼は不公平な決定に対して強く抗議した。
B2 verb /rɪˈzɛmbəl/

resemble

似ている
Meaning
to look like or be similar to something or someone
Example
She resembles her mother in both appearance and mannerisms.
彼女は見た目と仕草の両方で母親に似ています。
C2 verb /ˈreə.rɪ.faɪ/

rarefy

薄くする, 精製する
Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
山に登るにつれて、空気は薄くなります。