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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。
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 verb /rɪˈzaɪd/

reside

住む
Meaning
to live or dwell in a particular place
Example
They reside in a large house near the river.
彼らは川の近くの大きな家に住んでいます。
C1 verb /rɪˈnɛɡ/

renege

約束を破る
Meaning
to go back on a promise, agreement, or commitment
Example
The company reneged on its promise to increase wages.
その会社は賃金を引き上げるという約束を破りました。
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。
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。
C1 noun /rɪˈdʌn.dəns/

Redundance

冗長
Meaning
the state of being not or no longer needed or useful; superfluous repetition of information
Example
The document contained redundance that made it unnecessarily long.
その文書には冗長性が含まれており、不必要に長くなっていました。
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。
C1 noun /rɪˈtrækʃən/

retraction

撤回, 言明撤回
Meaning
the act of taking back a statement, promise, or belief
Example
The newspaper issued a retraction of the false report.
新聞は虚偽の報告の撤回を発表しました。
B1 adjective /rɪˈdɪk.jə.ləs/

Ridiculous

馬鹿げた; ばかばかしい; 不合理な
Meaning
extremely silly or unreasonable; deserving or causing laughter
Example
The idea of building a house without tools is ridiculous.
道具なしで家を建てるアイデアは馬鹿げている。
C2 noun /rɪˈfɛktəri/

refectory

食堂
Meaning
a dining hall, especially in a monastery, convent, or school
Example
Students had lunch in the refectory.
学生たちは食堂で昼食をとった。
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。
A2 noun /reɪt/

rate

レート
Meaning
the cost or price of something, or the amount at which something happens
Example
The rate of inflation is increasing every year.
インフレ率は毎年増加しています。
C1 verb /ˌriː.ɪˈstæblɪʃ/

reestablish

再建する
Meaning
to set up or restore something again after it has been disrupted
Example
The government worked hard to reestablish peace in the region.
政府は地域の平和を再建するために懸命に働きました。
C1 noun /ræˈpɔːr/

rapport

関係
Meaning
A close and harmonious relationship in which the people or groups concerned understand each other's feelings or ideas.
Example
The teacher built a strong rapport with her students.
教師は生徒と強い関係を築いた。
A2 verb /rɪˈlæks/

relax

リラックスする
Meaning
to make or become less tense or anxious; to rest
Example
After a long day, she likes to relax with a good book.
長い一日の後で、彼女は良い本を持ってリラックスするのが好きです。
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。
C1 verb /rɪˈkaʊnt/

recount

語る
Meaning
to narrate or tell the details of an event or experience
Example
She recounted her adventures during the summer trip.
彼女は夏の旅行中の冒険について語った。
C2 adjective /rɪˈflɛksəbl/

reflexible

反射可能な
Meaning
Capable of being reflected or bent back.
Example
The surface was highly reflexible, bouncing light in different directions.
その表面は非常に反射可能で、光を異なる方向に反射させていました。
A2 verb /rɪˈmeɪn/

remain

残る
Meaning
to stay in the same place; to continue to exist
Example
Only a few guests remain at the party.
パーティーには少数のゲストが残っています。
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？
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。
C2 adjective /ˈreə.rɪ.faɪd/

rarefied

Meaning
Of high moral, intellectual, or cultural value; distant from ordinary life.
Example
He works in the rarefied world of classical music.
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。
A1 verb /riːd/

read

読む
Meaning
to look at written words and understand their meaning
Example
I read books before going to bed.
私は寝る前に本を読みます。
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。
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。
C1 verb /rɪˈdiːm/

redeem

償う
Meaning
to compensate for faults or mistakes; to exchange something for value
Example
He managed to redeem his reputation after the scandal.
彼はスキャンダル後に自分の評判を回復しました。
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。
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。
B2 noun /rɪˈhɜːr.səl/

Rehearsal

リハーサル; 公演の練習
Meaning
a practice performance of a play, concert, or other work for later public performance
Example
The final rehearsal before opening night went perfectly.
開幕前の最後のリハーサルは完璧でした。
C1 noun /ˌrɛfjʊˈteɪʃən/

refutation

反証
Meaning
The act of proving a statement or argument to be false or incorrect.
Example
Her essay was a strong refutation of the opposing theory.
彼女のエッセイは反対の理論に対する強い反証でした。
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 rɪˈzaɪn

resign

辞任する
Meaning
Voluntarily leave a job or other position.
Example
Ministers were forced to resign.
大臣たちは辞任を余儀なくされました。
C2 adjective /rɪˈdaʊ.tə.bəl/

redoubtable

恐ろしい/尊敬すべき
Meaning
formidable, especially as an opponent; inspiring fear or respect
Example
She was a redoubtable leader who commanded respect from all.
彼女は全員から尊敬を集める恐ろしいリーダーだった。
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。
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。
B1 verb /ˈreskjuː/

rescue

救助する
Meaning
to save someone or something from danger or harm
Example
The firefighters rescued the cat from the tree.
消防士は木から猫を救助しました。
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。
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 verb /ˌriːˈsiːt/

reseat

再座席
Meaning
to seat someone again or to fit something back into its place
Example
The usher had to reseat the guests after the interruption.
接客係は中断後、ゲストを再座席させなければならなかった。
C2 verb /rɛtʃ/

retch

幸せ
Meaning
to make the sound and movement of vomiting without bringing anything up
Example
The smell of spoiled food made him retch violently.
賞を受け取った時、彼女は喜びを隠すことができませんでした。
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 /rɪˈkwaɪtəl/

requital

報復
Meaning
The act of returning something, such as a favor, service, or punishment; repayment or retaliation.
Example
She offered her time in requital for his kindness.
彼女は彼の親切に報復として自分の時間を提供しました。
C1 adjective /ˈrep.jə.tə.bəl/

Reputable

評判の良い
Meaning
having a good reputation; respected and trusted
Example
She works for a reputable law firm in the city.
彼女はその都市の評判の良い法律事務所で働いています。
C1 noun /rɪˈpen.təns/

Repentance

悔い改め
Meaning
the action of repenting; sincere regret or remorse
Example
His genuine repentance moved everyone in the courtroom.
彼の真摯な悔い改めは、法廷のすべての人々を感動させました。
B2 adjective /ˈroʊlɪŋ/

rolling

転がる
Meaning
moving in gentle undulations; moving forward by turning over and over
Example
They drove through the rolling hills of the countryside.
彼らは田舎の転がる丘を通り抜けました。
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。
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。
B1 adverb /ˈruːdli/

Rudely

失礼に
Meaning
in an impolite or discourteous manner
Example
He rudely interrupted the speaker during the presentation.
彼はプレゼン中に話者を失礼に遮った。
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 /ræɡ/

Rag

古い布; 掃除に使われる擦り切れた衣類
Meaning
a piece of old cloth used for cleaning; worn-out clothing
Example
She used an old rag to clean the dusty table.
彼女は古い布を使って、ほこりだらけのテーブルを掃除しました。
C1 adjective /ˈraɪ.tʃəs/

Righteous

正義の; 公正な; 道徳的な
Meaning
morally right or justifiable; virtuous; having strong moral principles
Example
She felt righteous anger at the unfair treatment of workers.
彼女は労働者の不当な扱いに対して正義の怒りを感じました。
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。
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 verb /rɒt/

rot

腐る
Meaning
to decay or decompose; to become corrupt
Example
The fruit will rot if left in the sun.
果物は日光に当たると腐ります。
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。
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。
C2 noun /ˈrɪvjʊlət/

rivulet

小川
Meaning
a small stream of water; a tiny brook
Example
A rivulet ran down the hillside after the rain.
雨の後、小川が丘を下った。
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。
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。
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。
A1 adjective /ˈrɛd.i/

ready

準備ができた
Meaning
Prepared or available for use or action.
Example
She was ready to leave for the airport.
彼女は空港に行く準備ができていた。
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。
C1 adjective /ˈrʌs.tɪk/

Rustic

シンプルで洗練されていない; 農村地域に関連
Meaning
simple and unsophisticated; relating to rural areas
Example
The rustic cottage had wooden beams and a thatched roof.
そのラスティックな小屋は木製の梁と藁葺きの屋根を持っていた。
B2 verb /ˈræl.i/

rally

Meaning
to come together for a common purpose or to recover strength or spirit
Example
The team rallied after halftime and won the match.
B2 verb /ˈrɛkən/

reckon

推測する
Meaning
To think, believe, or expect something; to calculate or estimate.
Example
I reckon it will rain later today.
今日は後で雨が降るだろうと思います。
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。
B1 adjective /rɪˈleɪ.tɪd/

Related

関連; 結びついている
Meaning
connected; associated; having a connection or relationship
Example
These two problems are closely related to each other.
これらの二つの問題はお互いに密接に関連しています。
B2 noun ˌrɛvəˈluːʃən

revolution

革命
Meaning
A forcible overthrow of a government or social order, in favor of a new system.
Example
The story is set during the French Revolution.
物語はフランス革命の時代に設定されています。
C1 noun/verb /rɪˈpoʊz/

repose

休息
Meaning
a state of rest, sleep, or tranquility; to rest or lie in a peaceful position
Example
After the long journey, she sought repose in the quiet garden.
長い旅の後、彼女は静かな庭で休息を求めた。
B2 verb /rɪˈfaɪn/

refine

洗練する
Meaning
to improve by making small changes; to purify
Example
The chef refines the recipe to perfection.
シェフはレシピを完璧に洗練します。
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。
C1 noun/verb /rɪˈpriːv/

reprieve

Meaning
A temporary relief or delay from something unpleasant; to postpone or cancel punishment.
Example
The prisoner was granted a last-minute reprieve from execution.
B1 noun ˌrek.ə.menˈdeɪ.ʃənz

recommendations

推薦
Meaning
Suggestions or proposals as to the best course of action.
Example
The commission submitted their recommendations.
委員会はその推薦を提出しました。
B1 verb /rʌb/

rub

こする
Meaning
to press and move something firmly against a surface; to apply pressure with movement
Example
She rubbed her hands together to keep them warm.
彼女は手をこすり合わせて暖かく保った。
C2 noun /ˌræproʊʃˈmɑːn/

rapprochement

関係修復
Meaning
The establishment or resumption of harmonious relations.
Example
The two countries signed an agreement that marked a new rapprochement.
二国は新しい関係修復を示す合意書に署名した。
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。
A1 adjective /red/

Red

赤
Meaning
having the color of blood or fire; of the color red
Example
She wore a beautiful red dress to the party.
彼女はパーティーに美しい赤いドレスを着ていた。
B1 noun ˈreɪn.fɒr.ɪst

rainforest

熱帯雨林
Meaning
A luxuriant, dense forest rich in biodiversity, found typically in tropical areas with consistently heavy rainfall.
Example
The Amazon rainforest is home to millions of species.
アマゾンの熱帯雨林は数百万種の生物の家です。
C1 noun /ˈrez.ɪ.dənt ˈkəʊ.ɔː.dɪ.neɪ.tər/

resident coordinator

居住者コーディネーター
Meaning
A local administrator or official who coordinates activities in a specific region.
Example
The resident coordinator welcomed all representatives.
居住者コーディネーターは全ての代表者を歓迎しました。
B2 verb /rɪˈzɪst/

resist

抵抗する
Meaning
to oppose or fight against; to withstand
Example
He could not resist the temptation.
彼は誘惑に抵抗できませんでした。
C1 noun rɪˌdʒɛnəˈreɪʃən

regeneration

再生
Meaning
Renewal, growth and development of cells, tissues or energy
Example
Proper rest allows muscle regeneration after exercise.
適切な休息は、運動後の筋肉の再生を促進します。
C1 verb /rɪˈpiːl/

repeal

Meaning
To officially cancel or revoke a law or decision.
Example
The government decided to repeal the outdated law.
B2 adjective /rɪˈflektɪv/

Reflective

反射的; 思慮深い; 光や画像を反射できる
Meaning
thoughtful; contemplative; able to reflect light or images
Example
After the meeting, he was in a reflective mood.
会議の後、彼は反射的な気分だった。
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 verb /ˌriː.kənˈstrʌkt/

reconstruct

再建する
Meaning
to build or form something again after it has been damaged or destroyed
Example
The city was reconstructed after the earthquake.
その都市は地震後に再建されました。
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 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。
C2 adjective /ˈrɛstɪv/

restive

落ち着かない
Meaning
unable to stay still or silent; restless and impatient
Example
The crowd grew restive as they waited for the concert to begin.
コンサートが始まるのを待っている間、観客は落ち着かなくなった。
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。
B2 noun /ˈrest.ləs.nəs/

Restlessness

不安
Meaning
the inability to rest or relax as a result of anxiety or boredom
Example
His restlessness during the long meeting was obvious to everyone.
長い会議中、彼の不安は全員に明らかだった。
B2 verb /ˌriː.ɪnˈfɔːrs/

reinforce

強化する
Meaning
To strengthen or support something with additional material, people, or effort.
Example
The teacher used examples to reinforce the lesson.
教師は例を使って授業を強化しました。
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。
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。
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 /rəˈʃɛrʃ/

recherche

希少
Meaning
Rare, exotic, or obscure, often in a sophisticated or refined way.
Example
The gallery displayed many recherche artworks from unknown artists.
ギャラリーは、未知のアーティストによる多くの希少なアート作品を展示しました。
C1 noun /rɪˌdʒuːvəˈneɪʃən/

rejuvenation

再生
Meaning
The process of restoring something to a former better state, especially referring to renewing soil fertility or revitalizing agricultural land through various restoration practices.
Example
Rejuvenation of soil is necessary for sustainable agriculture.
土壌の再生は持続可能な農業にとって必要不可欠です。
C1 noun /ˈrʌfiən/

Ruffian

暴力的な人物; 不良;
Meaning
a violent person, especially one involved in crime; a brutal or lawless person
Example
The ruffian threatened the shopkeeper for money.
不良は店主を金のために脅した。
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 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。
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。
C2 adjective /rɪˈfɛrəbəl/

referable

参照可能な
Meaning
able to be related or directed to something
Example
The issue is referable to the new policy changes.
その問題は新しい政策変更に関連付けることができます。
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。
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。
B2 noun /roʊˈteɪʃən/

Rotation

回転; 回転運動; 自転
Meaning
the action of rotating around an axis or center; a single turn
Example
The Earth's rotation takes 24 hours to complete.
地球の回転は24時間かかります。
B1 noun /ˈriː.dʒən/

Region

地域; 区域; 地帯
Meaning
a particular area or part of a country or the world
Example
This region is famous for its wine production.
この地域はワイン生産で有名です。
B1 adjective /rɪˈmoʊt/

remote

遠隔
Meaning
Situated far from the main centers of population; distant.
Example
They stayed in a remote village during their trip.
彼らは旅行中に遠隔の村に泊まりました。
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。
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。
C1 verb /rɪˈsɜːrdʒ/

resurge

再興
Meaning
To rise, increase, or become active again after a decline.
Example
Interest in traditional crafts has begun to resurge.
伝統工芸に対する関心が再び高まり始めています。
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。
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。
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。
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。
B1 noun /rɪˈsɔːrs/

resource

資源
Meaning
A supply of materials, money, or assets that can be used when needed.
Example
Water is a vital natural resource.
水は重要な自然資源です。
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 /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。
C1 adjective /rɪˈvenʒ.fəl/

Revengeful

復讐心に燃える
Meaning
seeking or desiring revenge; vindictive
Example
He became revengeful after being betrayed by his friend.
彼は友達に裏切られた後、復讐心に燃えるようになった。
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 adjective /ˈriː.fleks/

Reflex

反射
Meaning
an action performed without conscious thought; relating to reflection
Example
The doctor tested her reflex response by tapping her knee.
医師は彼女の膝を軽く叩いて反射的な反応をテストしました。