Rust
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B2 noun /rʌst/

Rust

錆
Meaning
reddish-brown coating formed on iron or steel by oxidation; corrosion
Example
The old car was covered in rust after years of neglect.
古い車は何年も放置されていた後、サビで覆われていました。
B2 verb /rɪˈzɜːv/

reserve

予約する
Meaning
to keep something for future use; to book in advance
Example
I want to reserve a table for dinner.
ディナーのためにテーブルを予約したいです。
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。
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。
B1 noun ruːlz ənd ˌrɛɡjʊˈleɪʃənz

rules and regulations

規則と規定
Meaning
Official orders and laws that control how something is done.
Example
Rules and regulations alone cannot change attitudes.
規則と規定だけでは態度を変えることはできません。
C2 noun /ˈreɪləri/

raillery

友好的な冗談
Meaning
good-humored teasing or joking
Example
Their friendship was full of light-hearted raillery.
彼らの友情は軽い冗談で満ちていました。
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。
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。
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/noun /ˈrɛlɪʃ/

relish

楽しむ / 調味料
Meaning
to greatly enjoy; also a condiment or sauce
Example
She relished the opportunity to travel abroad.
彼女は海外旅行の機会を大いに楽しんでいました。
B2 adverb /rɪˈspektɪvli/

Respectively

それぞれ; 指定された順序で; 別々に、そしてすでに言及された順序で
Meaning
in the order given; separately and in the order already mentioned
Example
John and Mary are 25 and 30 years old respectively.
ジョンとメアリーはそれぞれ25歳と30歳です。
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。
B1 noun /rɪsk/

Risk

リスク
Meaning
a situation involving exposure to danger; the possibility of something bad happening
Example
Taking this investment carries a high risk of losing money.
この投資には高いリスクが伴い、資金を失う可能性があります。
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。
C2 noun /ruːˈeɪ/

roue

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

restrain

抑制する
Meaning
to hold back or control; to limit or restrict
Example
Please restrain your dog.
犬を制御してください。
B1 adjective ˈriː.dʒən.əl

regional

地域の
Meaning
Relating to or characteristic of a region.
Example
Regional hubs support localized industries.
地域のハブは地元産業をサポートします。
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。
B2 verb /ˌriːˈbɪld/

rebuild

再建する
Meaning
to build something again after it has been damaged or destroyed
Example
The villagers worked together to rebuild the bridge after the flood.
村人たちは洪水の後、橋を再建するために協力しました。
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。
B1 adjective /rɪˈmɑːrkəbl/

Remarkable

注目すべき; 非凡な; 顕著な;
Meaning
worthy of attention; extraordinary; notable;
Example
His recovery from the illness was remarkable.
病気から回復することは注目すべきことでした。
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。
C2 adjective rɪˈtɛn.tɪv

retentive

記憶力が強い
Meaning
Having strong memory or the ability to retain information for a long time.
Example
Students with a retentive memory excel in academics.
記憶力が強い学生は学業で優れています。
B2 adjective /raɪp/

Ripe

熟した; 食べる準備ができた
Meaning
fully developed and ready to eat; mature; ready for action or use
Example
The bananas are ripe and ready to eat.
バナナは熟して食べる準備ができています。
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 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 /rɪˈvɜːrbəreɪt/

reverberate

反響する
Meaning
To echo repeatedly or have continuing effects.
Example
The sound of the explosion reverberated through the valley.
爆発音は谷を通り過ぎて反響しました。
C1 noun /ˌrɛpəˈreɪʃən/

reparation

賠償
Meaning
the making of amends for a wrong done by paying money or helping those who were wronged
Example
The government offered reparations to the victims of the conflict.
政府は紛争の被害者に賠償を提供しました。
A2 preposition /riː/

re

について
Meaning
concerning or about (used in formal letters or emails)
Example
The letter was sent re your recent application.
その手紙はあなたの最近の申請について送られました。
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。
C1 verb /ˌrɛzəˈrɛkt/

resurrect

復活させる
Meaning
To bring back to life or revive something from the past.
Example
The director decided to resurrect the old play for a new audience.
監督は新しい観客のために古い劇を復活させることに決めました。
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 noun /ˈriːzənɪŋ/

reasoning

推論
Meaning
the process of thinking about something in a logical way in order to form a conclusion or judgment
Example
Her reasoning for leaving was clear and logical.
彼女の出発の推論は明確で論理的でした。
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。
C2 noun /rɪˈfrɪndʒənsi/

refringency

屈折率
Meaning
The ability of a substance to bend light; refractive power.
Example
Glass has a higher refringency than water.
ガラスは水よりも高いリフリンジェンシーを持っています。
C1 adjective rɪˈsɛʃ.ən.er.i

recessionary

不況に関する
Meaning
Relating to or characterized by economic recession.
Example
Governments introduce policies to counter recessionary effects.
政府は景気後退の影響に対処するために政策を導入しています。
C1 noun ˌriːˈstrʌk.tʃər.ɪŋ

restructuring

再構築
Meaning
The action of organizing something differently.
Example
The company underwent restructuring to improve efficiency.
会社は効率を高めるために再構築を行った。
B2 noun/verb /rɪˈmɑːrk/

remark

発言
Meaning
something that is said; a comment
Example
She made a remark about the weather.
彼女は天気について発言した。
B1 verb /rɪˈviːl/

reveal

明らかにする
Meaning
to make known or show something that was hidden
Example
The investigation revealed the truth.
調査は真実を明らかにした。
C2 adjective /ˈroʊziət/

roseate

バラ色の、楽観的な
Meaning
Having a pink color; optimistic or idealistic.
Example
She looked at the future with roseate optimism.
彼女はローズ色の楽観主義で未来を見ました。
C2 adjective /ˈrɛkriənt/

recreant

臆病な, 裏切り者
Meaning
cowardly or unfaithful to duty
Example
The recreant soldier abandoned his post in fear.
その臆病な兵士は恐怖で自分のポストを放棄した。
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。
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。
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.
C1 noun/verb /reɪn/

rein

Meaning
A strap used to control a horse; to control or guide something.
Example
The rider pulled the rein to stop the horse.
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。
B1 noun /ˈreɪlˌroʊd/

railroad

鉄道
Meaning
a track or system of tracks made of steel rails along which trains run
Example
The railroad connects the city to several nearby towns.
鉄道は都市といくつかの近くの町を結びつけています。
B1 preposition /rɪˈɡɑrdɪŋ/

regarding

に関して
Meaning
concerning or relating to
Example
The decision regarding the meeting will be made tomorrow.
会議に関する決定は明日行われます。
B1 adjective /rʌf/

Rough

ざらざらした; 荒い; 厳しい
Meaning
having an uneven surface; not smooth; harsh
Example
The rough surface of the rock hurt my hands.
岩石のざらざらした表面が私の手を傷つけました。
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。
B1 verb /rɪˈflekt/

reflect

反映する
Meaning
to think deeply about; to mirror back light or image
Example
The mirror reflects her beautiful face.
鏡は彼女の美しい顔を反映しています。
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。
B2 verb /ˌriːkriˈeɪt/

recreate

再創造する
Meaning
to create or produce something again, especially a new version of something lost or destroyed
Example
The team recreated the lost dataset from backups.
チームはバックアップから失われたデータセットを再作成しました。
C2 noun/adjective /rɪˈmɒnstrənt/

remonstrant

抗議者
Meaning
A person who makes a forceful protest (noun); protesting or objecting (adjective).
Example
He was a remonstrant voice in the assembly.
彼は集会で抗議の声を上げていた。
C2 adjective /rɪˈfræɡəbəl/

refragable

反論可能な
Meaning
Capable of being refuted or disproved.
Example
His argument was weak and easily refragable.
彼の議論は弱く、簡単に反論可能だった。
B2 noun /ˈruːmər/

rumor

噂
Meaning
a currently circulating story or report of uncertain or doubtful truth.
Example
There’s a rumor that the company will merge next year.
来年、会社が合併するという噂があります。
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。
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。
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。
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。
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 /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。
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。
B1 verb /rɪd/

rid

取り除く
Meaning
to remove or get rid of something
Example
I need to rid the house of all the clutter.
家の中のすべてのゴミを取り除く必要があります。
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。
C2 adjective /rɪˈfræktəri/

refractory

反抗的
Meaning
Stubborn or resistant to control, authority, or treatment.
Example
The refractory child refused to follow the teacher's instructions.
反抗的な子供は教師の指示に従うのを拒否した。
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。
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 /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。
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。
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。
B1 noun /rɪˈspɒns/

Response

反応; 応答
Meaning
a reaction to something; an answer or reply; the way in which something reacts to external stimulus
Example
The government's response to the crisis was swift and decisive.
政府の危機への反応は迅速で決定的でした。
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 verb /ˈraɪpən/

ripen

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

Ratification

承認
Meaning
the action of signing or giving formal consent to a treaty, contract, or agreement
Example
The treaty required ratification by both countries' parliaments.
その条約は両国の議会による批准を必要とした。
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。
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。
C1 noun /rɛnˈdɪʃən/

rendition

演奏
Meaning
a performance or interpretation of a piece of art, music, or text
Example
The singer gave a moving rendition of the classic song.
歌手はクラシックな歌の感動的な演奏を行いました。
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 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 noun /rɪˈdʒɪdəti/

Rigidity

剛性
Meaning
inability to bend or be forced out of shape; unwillingness to change or compromise
Example
The rigidity of the old system prevented any innovation.
古いシステムの剛性は、どんな革新も妨げました。
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 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。
B2 noun /ˈraɪfəl/

Rifle

ライフル
Meaning
a gun with a long barrel that is fired from the shoulder
Example
The soldier carried a rifle during the mission.
兵士は任務中にライフルを携帯していました。
C2 adjective /roʊn/

roan

ロアン馬
Meaning
denoting an animal, especially a horse, having a coat of mixed colors, typically reddish-brown and white
Example
The rider mounted a roan horse with a speckled coat.
騎手は斑点のあるコートを持ったロアン馬に乗った。
C1 noun /ˈrɛdʒɪmənt/

regiment

Meaning
A permanent unit of an army, typically commanded by a colonel and divided into several companies.
Example
The regiment marched proudly through the streets after returning from the mission.
C2 verb /rɪˈɡeɪl/

regale

楽しませる
Meaning
To entertain or amuse someone with stories, food, or drink.
Example
He regaled us with stories of his travels around the world.
彼は世界中を旅した話で私たちを楽しませました。
C2 noun /ˌrɛprəˈbeɪʃən/

reprobation

Meaning
Strong disapproval or condemnation; rejection by God as beyond salvation.
Example
The teacher’s face showed clear reprobation at the student’s rude remark.
C2 noun /rɪˈpæst/

repast

食事
Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
彼らは川辺で美味しい食事を楽しんだ。
C2 noun /ˈreɪmənt/

raiment

衣服
Meaning
clothing, especially fine or formal wear
Example
The king wore royal raiment during the ceremony.
王は儀式の間、王族の衣服を着ていた。
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。
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。
B2 adjective /ˈrʌn daʊn/

run-down

荒れ果てた
Meaning
in a poor condition; worn out or neglected
Example
They live in a run-down house at the edge of town.
彼らは町の端にある荒れ果てた家に住んでいます。
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。
B1 noun rɪˈdʌk.ʃən

reduction

削減
Meaning
The action or fact of making a specified thing smaller or less in amount, degree, or size.
Example
Greenhouse gas reduction is a primary global goal.
温室効果ガスの削減は主要な地球規模の目標です。
B2 noun /ˌrezəˈveɪʃən/

Reservation

予約
Meaning
the action of reserving something; an arrangement whereby something is reserved for a particular person; a qualification to an expression of agreement or approval
Example
I made a reservation at the restaurant for tonight.
今夜のレストランの予約をしました。
C2 noun /rʌmp/

Rump

尻; お尻; 背中の下部
Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
その馬は転倒した際にお尻を痛めました。
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 /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。
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 verb /ræsp/

rasp

Meaning
to speak in a rough, harsh voice or to scrape with a coarse sound
Example
He rasped out a warning before collapsing.
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。
C2 noun /ruːd/

rood

十字架
Meaning
a crucifix, especially one positioned above the entrance to the chancel of a church
Example
The old church displayed a carved rood above the altar.
古い教会は祭壇の上に彫られた十字架を展示していました。
B1 adjective /roʊˈmæn.tɪk/

Romantic

ロマンチック
Meaning
relating to love; idealistic; dreamy
Example
They enjoyed a romantic dinner by candlelight.
彼らはろうそくの光でロマンチックなディナーを楽しんでいました。
C2 verb /rɪˈdaʊnd/

redound

貢献する
Meaning
to contribute greatly to a result or consequence, usually beneficial
Example
His hard work will redound to the success of the company.
彼の努力は会社の成功に貢献するでしょう。
A2 verb /rɪˈplaɪ/

reply

返事する
Meaning
to give an answer; to respond
Example
She replies to emails quickly.
彼女はすぐにメールに返信します。
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 adverb /ˈrɪdʒɪdli/

Rigidly

厳格に; 柔軟性なしで
Meaning
in a strict, inflexible manner; without compromise
Example
The rules are rigidly enforced in this institution.
この機関ではルールは厳格に適用されます。
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 adjective /ˈrɪbɔːld/

ribald

下品な冗談
Meaning
Referring to sexual matters in a humorous or vulgar way.
Example
The comedian’s ribald jokes made the audience laugh uncomfortably.
コメディアンの下品な冗談は観客を不快にさせながら笑わせた。
A2 adjective /reər/

Rare

珍しい
Meaning
not occurring very often; uncommon or unusual
Example
It's rare to find such beautiful handmade jewelry these days.
こんな美しい手作りのジュエリーを見つけることは珍しい。
B2 noun /ˈraɪdər/

rider

ライダー
Meaning
A person who rides a horse, bicycle, motorcycle, or other vehicle.
Example
The rider fell off the horse.
ライダーは馬から落ちました。
C2 verb /ruː/

rue

後悔する
Meaning
To feel regret or sorrow about something.
Example
She will rue the day she trusted him.
彼女は彼を信じたその日を後悔するだろう。
B2 adjective /rɪˈnjuː.ə.bəl/

renewable

再生可能
Meaning
Able to be renewed or replaced naturally; not depleted when used.
Example
Renewable resources minimize environmental damage.
再生可能な資源は環境へのダメージを最小限に抑えます。
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。
C1 adjective /rɪˈbel.jəs/

Rebellious

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

residual

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

revulsion

嫌悪
Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
彼女はその残酷な行為を見て嫌悪感を覚えた。