B1 verb /rɪˈspɒnd/

respond

requisition

要求

Meaning

An official order laying claim to the use of property or materials; a formal demand or request.

Example

The manager submitted a requisition for new office supplies.

マネージャーは新しいオフィス用品のためのレクイジションを提出しました。

B2 noun /rɪˌlaɪəˈbɪləti/

reliability

信頼性

Meaning

the quality of being trustworthy or performing consistently well

Example

Customers value the reliability of our service.

お客様は私たちのサービスの信頼性を重視しています。

C1 adjective /rɪˈkʌr.ənt/

Recurrent

再発性の

Meaning

happening repeatedly; occurring again and again; periodic;

Example

She has been suffering from recurrent headaches for months.

彼女は数ヶ月間、繰り返す頭痛に悩まされています。

B2 adjective /ˈreɪʃəl/

racial

人種の

Meaning

relating to a race of people

Example

Racial equality is an important issue in many societies.

人種平等は多くの社会において重要な問題です。

C1 noun rɪˌkuːpərˈeɪʃən

recuperation

回復

Meaning

The process of gradually recovering from illness or fatigue

Example

Rest is essential for recuperation after illness.

病気からの回復には休息が不可欠です。

B2 noun /ˌriː.əˈʃʊr.əns/

Reassurance

安心

Meaning

comfort or confidence given to someone to remove their fears or doubts

Example

She needed reassurance that everything would be okay.

彼女はすべてがうまくいくことを確認するために安心が必要でした。

C1 noun /rɪdʒ/

ridge

山の稜線または頂上

Meaning

a long, narrow hilltop, mountain range, or raised strip

Example

We walked along the mountain ridge.

私たちは山脈の稜線に沿って歩きました。

C1 noun /rɪˈpjuːt/

repute

評判

Meaning

the opinion generally held of someone or something; reputation

Example

He is a scholar of great repute in his field.

彼はその分野で大変な評判を持つ学者です。

B1 noun /rɪˈtaɪə.mənt/

Retirement

退職

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.

彼は40年間の勤務の後、退職を計画しています。

B2 verb /rɪˈkɔːl/

recall

思い出す

Meaning

to bring (a memory, fact, or situation) back into one's mind

Example

I can't recall the last time we met.

最後に会った時のことを思い出せません。

B1 noun /ˈrʌbər/

rubber

幸福

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.

彼女は賞を受け取ったとき、自分の幸福を隠すことができませんでした。

C2 noun /rɪˈfræk.tər/

refractor

屈折望遠鏡

Meaning

A type of telescope that uses lenses to focus light.

Example

Refractor telescopes use lenses to focus light.

屈折望遠鏡は光を集中させるためにレンズを使用します。

C2 adjective /ˈrʌdi/

ruddy

赤ら顔

Meaning

Having a healthy red color in the face.

Example

She had a ruddy complexion from working outdoors.

彼女は外で働いたため、赤ら顔でした。

C1 adjective /riˈæk.tɪv/

Reactive

反応的; 化学的に活発

Meaning

responding to situations rather than initiating them; chemically active

Example

The company took a reactive approach to customer complaints.

会社は顧客の苦情に反応的なアプローチを採用しました。

C2 noun /ˈræpsədi/

rhapsody

高揚した歌/賛美

Meaning

an expression of great enthusiasm or an epic musical composition

Example

The singer’s performance was a rhapsody of emotions.

歌手のパフォーマンスは感情のラプソディでした。

C1 verb /ˈrʌf.l̩/

ruffle

Meaning

to disturb the smoothness of something; to annoy or upset someone

Example

The wind ruffled her hair.

C2 noun /rɪˈkɒɡnɪzəns/

recognizance

法的義務

Meaning

A legal obligation or bond entered into before a court, especially to ensure future appearance.

Example

He was released on his own recognizance.

彼は自分の法的義務で釈放されました。

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。

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 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。

C1 noun /ˈrɛspɪt/

respite

休息

Meaning

A short period of rest or relief from something difficult or unpleasant.

Example

The weekend provided a welcome respite from work.

週末は仕事からの歓迎される休息を提供しました。

C2 noun /ræŋˈɡuːn ˈkriːpər/

Rangoon creeper

ランゴーンクリーパー

Meaning

A climbing vine with fragrant flowers that change color from white to pink to red

Example

The Rangoon creeper covered the entire fence with its sweet-smelling flowers.

ランゴーンクリーパーはその甘い香りの花でフェンス全体を覆いました。

A2 verb /rɪˈmaɪnd/

remind

思い出させる

Meaning

to cause someone to remember something

Example

Please remind me to call her tomorrow.

明日彼女に電話するのをリマインドして下さい。

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。

B2 verb /rɪˈfreʃ/

refresh

リフレッシュする

Meaning

to make fresh again; to restore energy

Example

A cold drink refreshes me on hot days.

暑い日には冷たい飲み物が私をリフレッシュさせます。

B2 adjective /ˈrɪdən/

ridden

覆われた

Meaning

Full of or dominated by something unpleasant.

Example

The country was ridden with corruption.

その国は腐敗に覆われていた。

C2 adjective /rɪˈzɪstləs/

resistless

抗えない

Meaning

Impossible to resist; having an overpowering effect.

Example

She felt a resistless urge to laugh at the joke.

彼女はジョークで笑いたいという抗えない衝動を感じた。

C1 noun /ˈruːdɪmənt/

rudiment

基本

Meaning

A basic principle, element, or fundamental part of something.

Example

He learned the rudiments of music before joining the band.

彼はバンドに参加する前に音楽の基礎を学びました。

C2 noun /ˈruː.mɪ.nənt/

ruminant

反芻動物

Meaning

a cud-chewing mammal, such as a cow or sheep

Example

Cows are ruminants that chew cud.

牛は反芻動物で、食べ物を再度咀嚼します。

A2 noun /rɒk/

rock

岩石

Meaning

a large, solid piece of mineral matter

Example

The mountain was made of solid rock.

その山は固い岩石でできていました。

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。

C1 adjective /rɪˈpʌɡ.nənt/

Repugnant

嫌悪感を引き起こす; 嫌な; 不快な

Meaning

extremely distasteful; unacceptable; causing disgust or strong dislike

Example

The idea of lying to his parents was repugnant to him.

両親に嘘をつくという考えは彼にとって嫌悪感を抱かせた。

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 noun /raɪm/

rime

霜

Meaning

frost formed on cold surfaces by freezing water vapor

Example

The trees were covered with a white rime after the cold night.

木々は冷たい夜の後、白い霜で覆われていました。

C1 verb /rænt/

rant

怒鳴る

Meaning

to speak or shout in an angry, uncontrolled way

Example

He ranted about the unfair treatment at work.

彼は仕事で不公平な扱いについて叫んでいました。

B1 verb /rɪˈlaɪ/

rely

頼る

Meaning

to depend on or trust someone or something

Example

I rely on my friends for support.

私は支援のために友達に頼ります。

C1 noun /rɪˈpɛərə/

repairer

修理人

Meaning

a person whose job is to fix damaged or broken things

Example

The repairer fixed the broken washing machine quickly.

修理人は壊れた洗濯機をすぐに直した。

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。

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。

C2 adjective /ˌrɛpərˈtɔːriəl/

repertorial

レポートに関する

Meaning

Relating to or characteristic of a repertoire, especially in journalism or performance contexts.

Example

The journalist's repertorial style captured every detail of the unfolding story.

そのジャーナリストのレポーティオリアルスタイルは、展開するストーリーのあらゆる詳細を捉えました。

C1 verb /ˈræn.də.maɪz/

randomize

ランダム化する

Meaning

To make something happen in a random order or manner.

Example

The software can randomize the order of questions.

ソフトウェアは質問の順番をランダマイズできます。

C1 noun /rɪˈkɒnɪsəns/

reconnaissance

偵察

Meaning

A survey or exploration, especially for military or strategic purposes.

Example

The soldiers conducted a reconnaissance of the enemy camp.

兵士たちは敵のキャンプの偵察を行った。

B2 adjective ˌrev.əˈluː.ʃən.ər.i

revolutionary

革命的な

Meaning

Involving or causing a complete or dramatic change.

Example

Revolutionary ideas are reshaping the industry.

革命的なアイデアが業界を再編成しています。

B2 noun /rɪˈstrɪk.ʃən/

Restriction

制限; 限界; コントロール

Meaning

a limiting condition or measure; the limitation or control of someone or something

Example

There are strict restrictions on smoking in public places.

公共の場所での喫煙には厳格な制限があります。

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。

B2 noun /ˈreɪ.zər/

Razor

かみそり

Meaning

a sharp-edged instrument used for shaving hair from the skin

Example

He shaved his beard with a sharp razor.

彼は鋭いかみそりでひげを剃った。

B2 noun ˌreɪ.di.oʊ.ækˈtɪv.ə.ti

radioactivity

放射性

Meaning

The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.

Example

Radioactivity is used in medical treatments like cancer therapy.

放射性は、がん治療のような医療に用いられている。

C2 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

要約する

Meaning

To summarize and state again the main points of something.

Example

The teacher asked the student to recapitulate the lesson.

教師は生徒にレッスンを要約するように頼みました。

C1 noun ˈrəʊvə

rover

ローバー

Meaning

A vehicle for driving over rough terrain, especially one driven by remote control over extraterrestrial terrain.

Example

The rover landed on Mars to begin its exploration.

ローバーは火星に着陸し、探査を開始しました。

B2 adjective ˌriːprəˈdʌktɪv

reproductive

繁殖に関する

Meaning

Relating to the reproduction of offspring.

Example

The reproductive cycle of pests can cause rapid infestations.

害虫の生殖サイクルは迅速な感染を引き起こす可能性があります。

C1 noun /ˌrev.əˈluː.ʃən.ər.i ˈbreɪk.θruː/

revolutionary breakthrough

革命的な発見

Meaning

A sudden, dramatic, and important discovery or development that changes everything.

Example

Robotic surgery is a revolutionary breakthrough in healthcare.

ロボット手術は医療分野での革命的な発見です。

B2 noun /rɪˈdʒɛkʃən/

rejection

拒絶

Meaning

the action of refusing or dismissing something or someone

Example

Her rejection of the offer surprised everyone.

彼女の提案の拒絶は皆を驚かせた。

B2 verb /rɪˈkɜːr/

recur

Meaning

to happen again, especially repeatedly or at regular intervals

Example

The headache tends to recur every few weeks.

A2 adjective /rɪˈspɒn.sə.bəl/

Responsible

責任がある; 任務を持っている; 信頼できる

Meaning

accountable; having duties; reliable and trustworthy

Example

Parents are responsible for their children's education and well-being.

親は子供たちの教育と福祉に責任があります。

C1 adjective /ˈrɪvɪtɪŋ/

riveting

魅力的な

Meaning

extremely interesting; holding the complete attention

Example

The movie was so riveting that nobody looked away.

その映画はとても魅力的で、誰も目を離すことができませんでした。

B1 verb /ˈrɛdʒɪstər/

register

登録する

Meaning

To enter or record officially on a list or in a book.

Example

You must register for the conference before the deadline.

期限前に会議に登録する必要があります。

B1 verb /rɪˈdʒekt/

reject

拒否する

Meaning

to refuse to accept or consider something

Example

The committee decided to reject the proposal.

委員会は提案を拒否することに決めました。

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。

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.

B1 noun /ˌrep.rɪˈzen.tə.tɪv/

representative

代表者

Meaning

A person chosen or appointed to act or speak for another or others.

Example

The representative addressed critical issues.

代表者は重要な問題に対処しました。

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。

B1 noun /rɪˈkwaɪə(r)mənt/

requirement

要件

Meaning

something that is necessary or demanded

Example

The job has specific educational requirements.

この仕事には特定の教育要件があります。

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。

B2 noun /ˌrep.ɪˈtɪʃ.ən/

Repetition

繰り返し

Meaning

the action of repeating something that has already been said or written

Example

Constant repetition helps students memorize vocabulary effectively.

継続的な繰り返しは、学生が語彙を効果的に覚えるのを助けます。

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。

B1 adjective /ˈriː.zən.ə.bəl/

Reasonable

合理的; 公正で実用的; 高すぎない; 論理的

Meaning

fair and sensible; not too expensive; logical and practical

Example

The hotel offers reasonable prices for quality accommodation.

そのホテルは品質の高い宿泊施設に対して合理的な価格を提供しています。

C2 noun /rɪˈvaɪlər/

reviler

侮辱者

Meaning

a person who criticizes or insults others abusively

Example

He was known as a reviler of all who opposed him.

彼は自分に反対する全ての人々を侮辱する者として知られていました。

C1 noun /ˈrɑːstər/

roster

リスト

Meaning

A list or plan showing people’s duties or times when they are scheduled.

Example

The manager updated the staff roster for next week.

マネージャーは来週のスタッフリストを更新しました。

C1 noun /rɪˈmɔːrs/

Remorse

後悔

Meaning

deep regret or guilt for a wrong committed; bitter regret for something done

Example

He felt deep remorse for his actions.

彼は自分の行動に対して深い後悔を感じていた。

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。

C1 noun /rɪˈmɛmbrəns/

remembrance

記憶

Meaning

the act of remembering or honoring someone or something

Example

A service was held in remembrance of the fallen soldiers.

戦死した兵士たちを記憶するための式典が行われた。

B2 noun /rɪˈfreʃ.mənt/

Refreshment

軽食

Meaning

food and drink that is served as a light meal; something that refreshes

Example

We served light refreshments after the meeting.

会議の後、軽食を提供しました。

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 verb /ˌriːəˈreɪndʒ/

rearrange

再配置する

Meaning

to change the order or position of something

Example

She decided to rearrange the furniture in her living room.

彼女はリビングルームの家具を再配置することに決めました。

A2 noun rɪˈsɜːtʃ

research

研究

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.

ラジオ波の研究はインドで早く始まりました。

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。

C1 verb /ˈruː.mɪ.neɪt/

ruminate

思索する, 反芻する

Meaning

to think deeply about something; to chew cud (for animals)

Example

She sat alone to ruminate on her decision.

彼女は自分の決断について一人で思索していた。

C1 adjective /ˈræmpənt/

rampant

蔓延する

Meaning

existing or spreading unchecked, often in an undesirable way

Example

Corruption was rampant in the city administration.

腐敗は市の行政で蔓延していた。

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。

C2 noun /rɪˈdʒɔɪndər/

rejoinder

返答

Meaning

a quick or witty reply; a response to a remark or argument

Example

His sharp rejoinder silenced the crowd.

彼の鋭い返答が群衆を沈黙させた。

C1 verb /rɪˈbjuːk/

rebuke

叱る

Meaning

to criticize or scold sharply; to express disapproval

Example

The teacher had to rebuke the student for cheating.

先生は cheating のため学生を叱らなければならなかった。

B1 noun /reɪ/

ray

光線

Meaning

a narrow beam of light, heat, or radiation

Example

A ray of sunlight broke through the clouds.

太陽の光線が雲を突き抜けた。

C1 noun /ˌræʃəˈnæl/

rationale

根本的な理由

Meaning

the underlying reason or explanation for something

Example

The rationale behind his decision was clearly explained.

彼の決断の背後にある理由は明確に説明されました。

A1 noun /raɪs/

Rice

ご飯

Meaning

a cereal grain that is a staple food in many countries

Example

We eat rice with curry for dinner.

私たちは夕食にカレーと一緒にご飯を食べます。

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.

B2 verb /rɪˈdʒɔɪs/

rejoice

喜ぶ

Meaning

to feel or show great joy; to celebrate

Example

The family rejoices at the good news.

その家族は良いニュースに喜んでいます。

B2 adjective /rɪˈzɪstənt/

resistant

耐性

Meaning

not affected by something; able to oppose or withstand

Example

This fabric is resistant to water and stains.

この布は水と汚れに強いです。

C1 verb /rɪˈlɛnt/

relent

譲歩する、柔らかくなる

Meaning

to become less severe, harsh, or strict

Example

After hours of begging, she finally relented.

何時間もの懇願の後、彼女はついに譲歩した。

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。

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。

B2 verb /ˌriː.kənˈsɪd.ər/

reconsider

再考する

Meaning

to think about something again, especially to change a decision or opinion

Example

She decided to reconsider her decision about moving abroad.

彼女は海外に引っ越すという決断を再考することに決めました。

C1 noun /ˈræftər/

rafter

小屋の梁

Meaning

One of the sloping beams that supports a roof.

Example

The old barn’s rafters were exposed.

古い納屋の小屋の梁がむき出しになっていました。

B1 adjective /rɪˈpiː.tɪd/

Repeated

繰り返しの; 多くの回発生する

Meaning

done again; happening again; occurring multiple times

Example

He made repeated attempts to contact her.

彼は何度も彼女に連絡を試みました。

B2 verb /rɪˈkʌvərɪŋ/

recovering

回復

Meaning

the process of getting better after illness, loss, or difficulty

Example

She is still recovering from the flu.

彼女はまだインフルエンザから回復しています。

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。

C2 noun /ˈrɛd.ə.ləns/

redolence

香り

Meaning

a pleasant smell or the quality of suggesting something strongly

Example

The redolence of jasmine filled the evening air.

ジャスミンの香りが夕方の空気を満たした。

C1 adjective /rɪˈsɪ.prə.kəl/

Reciprocal

相互の; 互恵的な; 両者で平等に分け合う;

Meaning

given or done in return; mutual; shared equally by both parties;

Example

The two countries have a reciprocal trade agreement.

二国間には相互の貿易協定があります。

B2 noun ˌriːkənˈstrʌkʃn

reconstruction

再建

Meaning

The action or process of reconstructing or being reconstructed.

Example

The reconstruction project took years.

再建プロジェクトは数年かかりました。

C2 adjective /ˈrɛkənˌsaɪləbl̩/

reconcilable

Meaning

Capable of being resolved or made consistent.

Example

Their differences are reconcilable with honest communication.

C1 noun ˈrɔɪəl ˈbɛŋɡəl ˈtaɪɡər

Royal Bengal Tiger

ロイヤルベンガルタイガー

Meaning

A subspecies of tiger found primarily in India and Bangladesh, known for its distinctive orange coat with black stripes.

Example

The Royal Bengal Tiger is an iconic species of the Sundarbans.

ロイヤルベンガルタイガーはスンダルバンスの象徴的な種です。

C1 noun /ˈræp.tʃər/

rapture

狂喜, 恍惚

Meaning

A feeling of intense joy, delight, or ecstasy.

Example

She listened to the music in rapture.

彼女は音楽に没頭して、狂喜していました。

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。

B2 adverb /rɪˈmɑːrkəbli/

remarkably

驚くべき方法で

Meaning

in a way that is worthy of attention or notice; surprisingly

Example

She did remarkably well in the competition.

彼女はコンペティションで驚くべき成果を上げました。

C2 noun /rɪˈɡætə/

regatta

ボート競走

Meaning

A sporting event consisting of a series of boat or yacht races.

Example

The annual regatta attracted competitors from around the world.

毎年のレガッタは世界中から競技者を引き付けた。

B2 verb /rɪˈteɪn/

retain

保持する

Meaning

to keep possession of something

Example

The company decided to retain its experienced employees.

会社は経験豊富な従業員を保持することに決めました。

C1 verb /rɪˈfjuːt/

refute

反論する

Meaning

To prove a statement, argument, or theory to be false or invalid.

Example

The lawyer refuted the witness's testimony with solid evidence.

弁護士は証人の証言を確かな証拠で反論しました。

C2 adjective /rəˈpeɪ.ʃəs/

rapacious

貪欲

Meaning

having an extreme desire to take things for oneself, greedy

Example

The rapacious landlord raised the rent without reason.

貪欲な家主は理由もなく家賃を上げた。

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 adjective /ˈræʃ.ən.əl/

Rational

合理的な; 論理的な; 理にかなった

Meaning

based on reason and logic; sensible and practical

Example

She made a rational decision based on the available facts.

彼女は利用可能な事実に基づいて合理的な決定を下しました。

C2 noun /ruːθ/

ruth

同情

Meaning

A feeling of pity, compassion, or sorrow.

Example

He felt no ruth for the people he had betrayed.

彼は裏切った人々に対して一切の同情を感じなかった。

B2 noun /ˈraɪət/

Riot

暴動; 騒乱

Meaning

a violent disturbance of the peace by a crowd; an uncontrolled outburst

Example

The peaceful protest turned into a riot when violence broke out.

平和的な抗議は暴力が起こったときに暴動に変わった。

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 ˌrev.əˈluː.ʃən.ər.i ɪˈnɪʃ.ə.tɪv

revolutionary initiative

革命的イニシアティブ

Meaning

A groundbreaking action or plan that brings about significant change or transformation.

Example

The revolutionary initiative promotes sustainable energy.

革命的なイニシアティブは持続可能なエネルギーを促進します。

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。

C1 noun ˈrɛp.ə.twɑːr

repertoire

レパートリー

Meaning

A stock of plays, dances, or pieces that a company or a performer knows or is prepared to perform.

Example

The actor's repertoire includes both comedy and drama.

俳優のレパートリーにはコメディとドラマが含まれています。

C1 verb /rɪˈsɪprəˌkeɪt/

reciprocate

応答する

Meaning

To respond to an action or gesture by making a corresponding one.

Example

She smiled at him, and he reciprocated with a warm hug.

彼女は彼に微笑み、彼は温かい抱擁で応じた。

C2 noun /ˈræbəl/

Rabble

群衆

Meaning

a disorderly crowd; the common people regarded as socially inferior

Example

The politician dismissed the protesters as mere rabble.

政治家は抗議者を単なる群衆として退けた。

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。

B2 noun /rɪˈsɪp.i.ənt/

Recipient

受取人

Meaning

a person who receives something

Example

She was the recipient of the prestigious award.

彼女はその名誉ある賞の受取人でした。

B2 adverb /rɪˈlʌk.tənt.li/

Reluctantly

いやいや

Meaning

in an unwilling manner; with hesitation or resistance

Example

She reluctantly agreed to help with the project.

彼女はプロジェクトを手伝うことに渋々同意した。