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。

C2 noun /ˈrʊkəri/

rookery

鳥の巣

Meaning

a place where rooks or other birds breed and nest in colonies

Example

We saw a rookery full of noisy birds near the forest.

森の近くで、騒がしい鳥たちでいっぱいの鳥の巣を見ました。

C1 adjective /ˌrɛprɪzɛnˈteɪʃənl̩/

representational

表現的

Meaning

Relating to or depicting something in a realistic or symbolic way.

Example

The artist preferred a representational style of painting.

アーティストは表現的な絵画スタイルを好んでいました。

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。

C1 verb /rɪˈpiːl/

repeal

Meaning

To officially cancel or revoke a law or decision.

Example

The government decided to repeal the outdated law.

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。

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 /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 /ˈroʊ.ɡɪʃ/

Roguish

いたずらな; 狡猾な

Meaning

mischievous; playfully dishonest

Example

His roguish smile suggested he was up to some mischief.

彼のいたずらな笑顔は、彼が何かいたずらを仕掛けていることを示唆していました。

C2 adjective /rəˈkoʊkoʊ/

rococo

ロココ

Meaning

characterized by ornate detail and elaborate decoration, especially in art, architecture, and design

Example

The palace was decorated in a lavish rococo style.

宮殿は豪華なロココ様式で装飾されていました。

C1 noun /rɪˈflɛktər/

reflector

反射器

Meaning

A surface or device that reflects light, heat, or sound, often used to direct beams or improve visibility.

Example

The cyclist attached a red reflector to the back of his bike for safety.

自転車のライダーは安全のために自分の自転車の後ろに赤い反射器を取り付けました。

C2 noun /ˌrɛv.əˈkeɪ.ʃən/

revocation

取り消し

Meaning

The act of officially canceling or withdrawing something.

Example

The court ordered the revocation of his license.

裁判所は彼のライセンスの取り消しを命じました。

B2 noun /ˈroʊstɪd miːt/

Roasted meat

ロースト肉

Meaning

meat cooked by dry heat in an oven or over fire

Example

The roasted meat was perfectly seasoned and tender.

ロースト肉は完璧に調味され、柔らかかった。

B1 verb /rɑːb/

rob

強盗する

Meaning

to steal money or property from a person or place; to commit robbery

Example

The thief tried to rob the bank last night.

泥棒は昨晩銀行を強盗しようとしました。

C1 noun /rɪˈdʒɔɪsɪŋ/

rejoicing

喜び

Meaning

The action of showing great joy or happiness

Example

There was much rejoicing after the victory.

勝利後、多くの喜びがありました。

C2 noun/verb /ˈrɛkəmˌpɛns/

recompense

賠償

Meaning

to compensate someone for loss or harm suffered; compensation given for damage or injury

Example

The company offered financial recompense to the injured worker.

その会社は負傷した労働者に対して金銭的な賠償を提供しました。

C2 adjective /ˈrɪz.ə.bəl/

risible

滑稽な

Meaning

so absurd or ridiculous that it deserves to be laughed at

Example

The idea of flying pigs is completely risible.

飛ぶ豚のアイデアは完全に滑稽です。

C2 verb /ˈrævɪʃ/

ravish

魅了する

Meaning

To fill with intense delight; to captivate or enchant.

Example

The beauty of the sunset ravished the travelers.

夕日の美しさが旅行者を魅了した。

C1 adjective /ˈrek.wɪ.zɪt/

Requisite

必要な; 必須の

Meaning

made necessary by particular circumstances; required

Example

Good communication skills are requisite for this job.

この仕事には良いコミュニケーションスキルが必要です。

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 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。

B2 adjective /rɪˈfreʃ.ɪŋ/

Refreshing

さわやか

Meaning

making one feel energized and renewed; pleasantly new or different

Example

The cool breeze was refreshing after the hot day.

暑い一日後の涼しい風はさわやかだった。

C2 noun /ˌrɛtəˈrɪʃən/

rhetorician

雄弁家

Meaning

A person who is skilled in the art of rhetoric or persuasive speaking/writing.

Example

The rhetorician captivated the audience with his eloquence.

雄弁家はその雄弁さで聴衆を魅了しました。

B2 noun /rɪˈsiː.vər/

Receiver

受話器

Meaning

a person or thing that receives something; the part of a telephone containing the earpiece and mouthpiece

Example

She picked up the receiver to answer the phone call.

彼女は電話に出るために受話器を取った。

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 verb /ˌriːɪmˈbɜːrs/

reimburse

払い戻す

Meaning

to pay back money to someone who has spent it or lost it

Example

The company reimbursed him for travel expenses.

会社は彼に旅行費用を払い戻しました。

C1 adjective /ˈriːɡəl/

regal

王室の

Meaning

Resembling or fit for a king; majestic or royal.

Example

The queen entered the hall with a regal presence.

女王は王室のような存在感でホールに入った。

C1 verb /rɪˈklaɪn/

recline

リクライニングする

Meaning

To lean or lie back in a relaxed position.

Example

She reclined on the sofa with a book.

彼女はソファで本を持ってリクライニングしていた。

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。

A2 adjective /ruːd/

Rude

失礼な; 無礼な; 粗野な; 厳しい

Meaning

impolite; discourteous; lacking civility; rough or harsh in manner

Example

It was rude of him to interrupt the meeting.

会議を中断することは失礼でした。

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。

C1 verb rɪˈlɪŋ.kwɪʃ

relinquish

放棄する

Meaning

To give up any authority, responsibility, or property.

Example

He decided to relinquish his position as CEO.

彼はCEOのポジションを放棄することに決めました。

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。

B2 noun /ˈrɒbər/

robber

強盗

Meaning

a person who steals property from others, often using force or threat

Example

The robber was caught after a quick police chase.

素早い警察の追跡の後、強盗は捕まった。

A2 noun /rɪˈlɪdʒ.ən/

religion

宗教

Meaning

a system of faith and worship involving belief in a higher power

Example

Freedom of religion is a fundamental human right.

宗教の自由は基本的人権です。

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 /ˌref.jʊˈdʒiː/

Refugee

難民

Meaning

a person who has been forced to leave their country in order to escape war, persecution, or natural disaster

Example

The refugee camp provided temporary shelter for thousands of displaced families.

難民キャンプは、何千人もの避難した家族に一時的な避難所を提供しました。

C2 adjective /ˈruːnɪk/

runic

ルーンに関連する

Meaning

relating to or consisting of runes; mysterious or magical

Example

The old stone had strange runic carvings on it.

古い石には奇妙なルーンの刻印がありました。

C2 noun /ˈreɪdɪks/

radix

基数

Meaning

the base or root of something; the number on which a system of numeration is built

Example

In mathematics, the decimal system has a radix of ten.

数学では、十進法の基数は十です。

B2 adjective /rɪˈzɜːrvd/

Reserved

控えめな; 内向的な

Meaning

slow to reveal emotion or opinions; restrained in manner

Example

She is quite reserved and doesn't talk much in meetings.

彼女はかなり控えめで、会議ではあまり話しません。

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。

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, 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.

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。

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。

A1 adjective /raʊnd/

round

丸い

Meaning

having a circular shape; shaped like a sphere or disk

Example

The table was round and had a smooth surface.

テーブルは丸くて、滑らかな表面がありました。

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。

B2 verb /rɪp/

rip

裂ける

Meaning

to tear something quickly or violently

Example

He accidentally ripped his shirt on the fence.

彼はフェンスでシャツをうっかり裂けてしまいました。

B2 noun ˌrɛstəˈreɪʃən

restoration

修復

Meaning

The process of returning something to its former condition.

Example

The restoration of the forest began after decades of neglect.

森林の修復は数十年の放置後に始まりました。

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。

C2 noun /ˌræʃioʊsɪˈneɪʃən/

ratiocination

推論

Meaning

the process of reasoning or logical thinking

Example

His ratiocination impressed the judges during the debate.

彼の推論は討論中に審査員を感動させた。

C1 noun /ˌrɛfəˈrɛndəm/

referendum

国民投票

Meaning

a general vote by the population on a single political issue

Example

The government held a referendum on the new constitution.

政府は新しい憲法について国民投票を実施しました。

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。

C1 noun /ˌrɛs.ɪˈprɒs.ɪ.ti/

reciprocity

相互利益のために他の人と物を交換する行為

Meaning

The practice of exchanging things with others for mutual benefit.

Example

Business relationships thrive on reciprocity.

ビジネス関係は相互利益に依存しています。

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。

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。

C1 adjective /ræmˈbʌŋk.ʃəs/

rambunctious

騒々しい

Meaning

boisterous, energetic, and difficult to control.

Example

The rambunctious children filled the house with noise.

騒々しい子供たちが家を騒音で満たしました。

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。

C1 verb /raʊz/

rouse

目覚める

Meaning

To awaken from sleep or to stir into action.

Example

The loud alarm roused him from his deep sleep.

大きなアラームが彼を深い眠りから起こした。

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。

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。

B1 noun /rɪˈvɪʒ.ən/

Revision

リビジョン; 修正版

Meaning

the action of revising; a revised edition or form of something; review of subject matter

Example

The students spent hours doing revision for their final exams.

学生たちは最終試験のために数時間リビジョンを行った。

B2 noun /ˈrem.ə.di/

Remedy

薬; 治療; 問題解決の手段

Meaning

a medicine or treatment for a disease; a solution to a problem

Example

This herbal remedy helps with headaches.

このハーブの薬は頭痛に効く。

B2 verb /rɪˈzɑlv/

resolve

解決する

Meaning

to solve a problem; to decide firmly

Example

The manager resolves the conflict between employees.

マネージャーは従業員間の対立を解決します。

C2 verb /rɪˈsɪnd/

rescind

取り消す

Meaning

to revoke, cancel, or repeal a law, order, or agreement

Example

The company decided to rescind the job offer.

その会社は仕事のオファーを取り消すことを決定しました。

B2 verb /roʊm/

roam

歩き回る

Meaning

to walk or travel without a specific destination; to wander

Example

Wild animals roam freely in the forest.

野生動物は森の中を自由に歩き回っています。

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 noun ˌriːfɔːˈreɪʃən

reforestation

再植林

Meaning

The natural or intentional restocking of existing forests and woodlands that have been depleted.

Example

Reforestation efforts are crucial to restoring ecosystems.

再植林の努力は、生態系の回復に重要です。

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。

A2 noun /roʊz/

Rose

バラ

Meaning

a fragrant flower with thorny stems, typically red, pink, white, or yellow

Example

She gave me a beautiful red rose for Valentine's Day.

彼女はバレンタインデーに私に美しい赤いバラをくれました。

C1 adjective /ˈrez.ə.luːt/

Resolute

決意の; 断固たる; 揺るがない

Meaning

determined; having a firm decision; unwavering

Example

She remained resolute in her decision to pursue her dreams.

彼女は夢を追い求める決意を固く持ち続けました。

C1 adjective /rɪˈpɛlənt/

repellent

忌避剤

Meaning

Able to drive away something, especially insects or unpleasant things; causing disgust or distaste.

Example

This cream is highly effective as a mosquito repellent.

このクリームは蚊除けとして非常に効果的です。

C1 verb /rɪˈmjuːnəreɪt/

remunerate

報酬を支払う

Meaning

To pay someone for services or work done.

Example

The company will remunerate employees fairly for their overtime.

会社は残業に対して従業員に公正な報酬を支払います。

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 adjective /rɪˈstreɪnd/

restrained

抑制された

Meaning

characterized by reserve or self-control; held back

Example

Her restrained reaction surprised everyone.

彼女の抑制された反応は皆を驚かせました。

B2 noun rɪˈzɪl.i.əns

resilience

レジリエンス

Meaning

The ability to recover quickly from difficulties; toughness.

Example

Testing the resilience of wood is crucial.

木材のレジリエンスをテストすることは非常に重要です。

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。

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。

C1 noun /ˈrɛpərˌtɔːri/

repertory

レパートリー

Meaning

A collection of works that a company, performer, or institution regularly performs; also a storehouse of information or skills.

Example

The theater has a repertory of classic plays.

劇場にはクラシックな演劇のレパートリーがあります。

B2 noun /ˌreɡ.jʊˈlær.ɪ.ti/

Regularity

規則正しさ

Meaning

the quality of being regular; occurring at fixed intervals or in a consistent pattern

Example

The regularity of his exercise routine helped him stay healthy.

彼の運動習慣の規則正しさが健康を維持するのに役立ちました。

C2 noun /rɪˈpoʊst/

riposte

鋭い返答

Meaning

a quick and clever reply to criticism or an insult

Example

Her sharp riposte left everyone in silence.

彼女の鋭い返答は皆を黙らせた。

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 noun /rɪˈsaɪtl/

recital

リサイタル

Meaning

A performance of music, dance, or poetry, usually by a soloist.

Example

She gave a piano recital at the concert hall.

彼女はコンサートホールでピアノのリサイタルを行いました。

C1 adjective /rɪˈpen.tənt/

Repentant

後悔している; 反省している; 悔いている

Meaning

feeling or expressing sincere regret and remorse; sorry for one's actions

Example

The repentant thief returned the stolen money.

後悔している泥棒は盗んだお金を返しました。

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。

B1 adjective /rɔː/

Raw

生の; 処理されていない; 自然な状態で; 未熟な

Meaning

uncooked; not processed; in natural state; inexperienced

Example

The chef prefers to use raw vegetables in his salads.

シェフはサラダに生野菜を使うのが好きです。

C1 noun /ˌræm.ɪ.fɪˈkeɪ.ʃən/

ramification

結果

Meaning

a consequence of an action or event, often complex or unwelcome.

Example

The new law has serious social ramifications.

新しい法律には深刻な社会的影響があります。

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 ˌrek.ə.menˈdeɪ.ʃənz

recommendations

Reptile

爬虫類

Meaning

a cold-blooded animal with scaly skin that lays eggs on land

Example

The lizard is a common reptile found in gardens.

トカゲは庭で見られる一般的な爬虫類です。

B1 noun /rɪˈpleɪsmənt/

replacement

交換

Meaning

the act of substituting one thing or person for another

Example

She got a replacement for her damaged phone.

彼女は壊れた電話の交換を受けました。

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。

B2 noun /ˌrɛvəˈleɪʃən/

revelation

啓示

Meaning

A surprising and previously unknown fact, especially one made known in a dramatic way.

Example

The book was full of shocking revelations about the politician.

その本はその政治家に関する衝撃的な啓示で満ちていました。

B1 noun /rɪˈsep.ʃən/

Reception

歓迎; 受け入れ; イベント;

Meaning

the action of receiving something or someone; a formal social occasion held to welcome someone

Example

The wedding reception was held at a beautiful hotel.

結婚式のレセプションは美しいホテルで行われました。

B1 noun rɪˈflɛkʃən

reflection

反射

Meaning

Serious thought or consideration about something.

Example

The reflection of the past filled his heart with sadness.

過去の反射が彼の心を悲しみに満たしました。

B2 noun /ˈreɪ.zɪnz/

Raisins

レーズン

Meaning

dried grapes, often used in cooking and baking

Example

She added raisins to the oatmeal cookies for extra sweetness.

彼女はオートミールクッキーに甘さを加えるためにレーズンを加えた。

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 adjective /ræpt/

Rapt

夢中な

Meaning

completely fascinated or absorbed by what one is seeing or hearing

Example

The children listened with rapt attention to the storyteller.

子供たちは物語の語り手に夢中で耳を傾けました。

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 /ˈrævənəs/

ravenous

猛烈にお腹がすいている

Meaning

Extremely hungry; famished.

Example

After the long hike, she was ravenous and ate quickly.

長いハイキングの後、彼女は猛烈にお腹がすいて、すぐに食べました。

C1 noun /ˈreɪ.vən/

Raven

ワタリガラス

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.

ワタリガラスが古いオークの木に止まり、大きな声で鳴いた。

B2 adjective /ˌrez.ɪˈden.ʃəl/

residential

住宅の

Meaning

Designed for people to live in.

Example

The institution was fully residential.

その施設は完全に住宅のものでした。

B2 verb /rɪˈkɜːr/

recur

Meaning

to happen again, especially repeatedly or at regular intervals

Example

The headache tends to recur every few weeks.

C1 adjective /ˌrɛtroʊˈæktɪv/

retroactive

遡及的

Meaning

applying to a period before it was enacted or established

Example

The new law was made retroactive to cover past cases.

新しい法律は過去のケースをカバーするために遡及的に作られました。

B2 noun /raɪˈnɒs.ər.əs/

Rhinoceros

サイ

Meaning

a large, heavy animal with thick skin and one or two horns on its nose

Example

The rhinoceros charged through the grassland.

サイは草原を突進した。

A2 verb /reɪz/

raise

上げる / 増加させる

Meaning

To lift or move something to a higher position; to increase; to bring up.

Example

She raised her hand to ask a question.

彼女は質問をするために手を上げました。

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 /ˈrɒbəɹi/

robbery

強盗

Meaning

the crime of stealing from someone or somewhere using force or threat

Example

The police are investigating the robbery at the local store.

警察は地元の店での強盗事件を調査しています。

C1 noun /ˈriːpər/

reaper

作物を刈り取り集める人または機械

Meaning

a person or machine that cuts and gathers crops

Example

The reaper moved slowly through the golden fields.

リーパーは金色の畑をゆっくりと進んでいきました。

B1 noun rəʊlz

Roles

役割

Meaning

A person's or thing's function in a particular situation.

Example

Defined roles improve team performance.

定義された役割はチームのパフォーマンスを向上させる。

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。

A2 noun /ruːf/

roof

屋根

Meaning

the top covering of a building or vehicle

Example

The roof of the house needs to be repaired.

家の屋根は修理が必要です。

B1 verb /rɪˈfɜː/

refer

参照する

Meaning

to mention or allude to something; to direct someone to a source of information

Example

Please refer to page 45 for more details.

詳細については、ページ45をご参照ください。

B1 verb rɪˈdjuːst

reduced

減らす

Meaning

Make smaller or less in amount, degree, or size.

Example

Singapore has reduced plastic usage significantly.

シンガポールはプラスチックの使用を大幅に減らしました。

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 noun ˈrez.ɪ.djuːz

residues

残留物

Meaning

A small amount of something that remains after the main part has gone or been taken or used.

Example

The burning process leaves no harmful residues.

燃焼プロセスでは有害な残留物は残りません。

B2 verb rɪˈstɔːr

restore

復元する

Meaning

To bring back to a former or original state; to reinstate.

Example

Restoring the tradition of student politics is necessary.

学生政治の伝統を復元することが必要です。

B2 verb /rɪˈsaɪt/

recite

暗唱する

Meaning

To say aloud something learned, especially poetry or text, from memory.

Example

The child recited a poem in front of the class.

その子はクラスの前で詩を暗唱しました。

C2 noun /rɪˌkrɪmɪˈneɪʃən/

recrimination

相互非難

Meaning

an accusation made in response to an accusation; mutual blaming

Example

The debate quickly descended into mutual recriminations.

討論はすぐに相互非難に陥った。

B2 adverb /rɪˈɡɑrdləs/

regardless

関係なく

Meaning

without paying attention to the current situation or condition

Example

She will go to the party regardless of the weather.

彼女は天気に関係なくパーティーに行きます。

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。