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C1 noun /raɪt/

rite

儀式
Meaning
a religious or ceremonial act
Example
The wedding rite was performed with great solemnity.
結婚式の儀式は厳粛に行われました。
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 /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。
A2 verb /roʊl/

roll

転がる
Meaning
to move by turning over and over on an axis
Example
She rolled the ball down the hill.
彼女はボールを丘の下に転がしました。
B2 verb /rɪˈzɛmbəl/

resemble

似ている
Meaning
to look like or be similar to something or someone
Example
She resembles her mother in both appearance and mannerisms.
彼女は見た目と仕草の両方で母親に似ています。
C1 noun /ˈræʃən/

ration

配給
Meaning
a fixed amount of something, especially food, officially allowed to each person
Example
During the war, each family received a weekly ration of rice.
戦争中、各家族は毎週一定量のご飯を配給されました。
B1 adjective /ˈrʊr.əl/

Rural

田舎の
Meaning
relating to the countryside; characteristic of farming or country life
Example
She grew up in a rural area far from the city.
彼女は街から遠く離れた田舎の地域で育ちました。
A1 noun /ˈrɛst(ə)rɒnt/

restaurant

レストラン
Meaning
a place where meals are prepared and served to customers
Example
We went to the restaurant for dinner.
私たちは夕食のためにレストランに行きました。
C2 verb /rɪˈfrækt/

refract

屈折する
Meaning
To bend light, sound, or heat as it passes through a medium.
Example
The water refracts light, making the straw look bent.
水は光を屈折させ、ストローが曲がって見える。
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。
B2 verb /rɪˈzɛnt/

resent

恨む
Meaning
to feel bitterness or displeasure about something or someone
Example
She began to resent the constant criticism from her boss.
彼女は上司からの絶え間ない批判をリゼントし始めました。
C2 adjective /rɪˈkæl.sɪ.trənt/

recalcitrant

反抗的, 頑固な, 服従しない
Meaning
Having an obstinately uncooperative attitude toward authority or discipline.
Example
The recalcitrant student refused to follow rules.
反抗的な学生は規則に従うことを拒否した。
B1 noun /rɪˈwɔːd/

reward

報酬
Meaning
something given in recognition of service, effort, or achievement
Example
He received a reward for returning the lost wallet.
彼は失くした財布を返したことで報酬を受け取りました。
C2 noun /rɪˈsɪʒən/

rescission

契約解除
Meaning
the cancellation or annulment of a law, contract, or agreement
Example
The rescission of the contract left both parties disappointed.
契約の解除により、双方は失望しました。
C1 adjective /ˈræb.ɪd/

rabid

狂信的
Meaning
Having extreme or fanatical support for something; relating to or suffering from rabies.
Example
He was a rabid fan of the football team.
彼はサッカーチームの狂信的なファンだった。
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 verb /ˌriːjuˈnaɪt/

reunite

再会する
Meaning
to bring together again after separation
Example
The family was reunited after many years.
その家族は何年も後に再会しました。
C1 adjective /riˈækʃəˌneri/

reactionary

反動的
Meaning
Opposing political or social progress or reform; extremely conservative.
Example
The group took a reactionary stance against the new policies.
グループは新しい政策に対して反動的な立場を取った。
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。
A2 verb /ˌrɛkəˈmɛnd/

recommend

勧める
Meaning
to suggest or advise something as being good or suitable
Example
I recommend trying the new restaurant downtown.
私はダウンタウンの新しいレストランを試すことをリコメンドします。
B1 noun rɪˈzɪs.təns

resistance

抵抗
Meaning
The refusal to accept or comply with something; the attempt to prevent something by action or argument.
Example
The resistance fought bravely against colonial forces.
レジスタンスは植民地軍に勇敢に立ち向かいました。
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。
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。
B2 verb /ˈreɪn.dʒɪŋ/

ranging

変動する
Meaning
Extending or varying between limits.
Example
The temperatures are ranging from 15 to 30 degrees this week.
今週の気温は15度から30度の間で変動しています。
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。
B2 noun rɪˈzentmənt

resentment

憤り
Meaning
Bitter indignation at having been treated unfairly.
Example
Resentment grew among the students.
学生の間で憤りが増大した。
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。
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。
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。
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。
C1 verb /reɪv/

rave

絶賛する
Meaning
to speak or write about something with great enthusiasm or admiration
Example
Critics rave about the new movie.
批評家たちは新しい映画を絶賛しています。
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。
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。
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。
B2 adjective /rɪˈɡret.ə.bəl/

Regrettable

残念な; 失望させる; 悲しい
Meaning
causing or deserving regret; unfortunate; deplorable
Example
It is regrettable that so many talented people left the company.
こんなに多くの才能ある人々が会社を辞めたのは残念です。
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 ˌrɛzɪɡˈneɪʃən

resignation

辞任
Meaning
The acceptance of something undesirable but inevitable; giving up.
Example
Her resignation from the position was unexpected.
彼女の職からの辞任は予想外だった。
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。
B2 noun ˈrɛstɪŋ pleɪs

resting place

安息地
Meaning
A place where someone or something rests, especially a burial site.
Example
The resting place of the martyrs is near the river.
殉教者の安息地は川の近くにあります。
B1 noun /ˈrʌnər/

runner

幸せ
Meaning
a person who runs, especially in races or for exercise
Example
The runner crossed the finish line with a big smile.
彼女は賞を受け取ったとき、幸せを隠せなかった。
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 /ˈrɪdəns/

riddance

解放
Meaning
The action of getting rid of something unwanted or unpleasant.
Example
His departure was considered a welcome riddance by the team.
彼の退職はチームにとって歓迎すべき解放と見なされた。
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。
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。
C1 adjective /ˈreɪ.kɪʃ/

Rakish

魅力的な
Meaning
having a dashing, jaunty, or slightly disreputable quality or appearance
Example
He wore his hat at a rakish angle that gave him a charming appearance.
彼は魅力的な角度で帽子をかぶって、魅力的な外見を与えた。
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 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 noun /ˈræŋ.kər/

rancor

憎しみ
Meaning
A feeling of deep and bitter anger or resentment.
Example
There was a rancor between the two rivals that never faded.
二人のライバルの間には、決して消えることのない憎しみがあった。
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。
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。
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。
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。
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。
C2 noun /rɪˌnʌnsiˈeɪʃən/

renunciation

放棄
Meaning
the formal rejection or giving up of something, usually a belief, claim, or way of life
Example
His renunciation of worldly pleasures impressed the monks.
彼の世俗的な楽しみへの放棄は僧侶たちに感銘を与えました。
C1 noun /ˈrep.lɪ.kə/

Replica

レプリカ
Meaning
an exact copy or model of something, especially one on a smaller scale
Example
The museum displayed a perfect replica of the ancient statue.
博物館は古代の彫像の完璧なレプリカを展示しました。
B2 noun /ˈræŋkɪŋ/

ranking

ランキング
Meaning
a position in a list or hierarchy, especially in terms of performance or importance
Example
His ranking in the competition improved after each round.
彼の競技でのランキングは、各ラウンド後に向上しました。
A2 noun /ræt/

Rat

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

regretful

後悔している
Meaning
feeling or showing sadness or disappointment about something that has happened or been done
Example
She gave him a regretful smile as she turned away.
彼女は振り返りながら後悔している笑顔を彼に向けた。
C1 noun /rɪˌsɛptɪˈvɪti/

receptivity

受容性
Meaning
The ability or willingness to receive something, especially signals or stimuli.
Example
Her receptivity to new ideas helped improve the project.
新しいアイデアへの受容性がプロジェクトの改善に役立った。
C1 verb /riːl/

reel

つまずく / 巻き取る
Meaning
to lose balance and stagger; to wind or spin something onto a reel
Example
He reeled backward after being punched.
彼は殴られた後、後ろに転んだ。
B2 adjective /ˈrɪski/

risky

Meaning
Involving the possibility of danger, harm, or loss
Example
Investing in that startup is risky but could bring high rewards.
B2 noun /ˈrɛlɪvəns/

relevance

関連性
Meaning
the quality or state of being closely connected or appropriate
Example
The relevance of the information was clear to everyone.
情報の関連性はすべての人に明確でした。
C1 noun /ˌriː.əˈdʒʌst.mənt/

readjustment

Meaning
The act of changing or correcting something again to make it suitable or balanced.
Example
After moving to a new city, he went through a period of readjustment.
C2 noun /ˈriːdʒənt/

regent

摂政
Meaning
a person who rules in place of a monarch when the monarch is absent or too young
Example
The prince acted as regent until the king came of age.
王子は王が成人するまで摂政として行動した。
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。
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 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 adjective, noun /rɪˈsiːvəbl/

receivable

回収可能
Meaning
Money that is owed to a company and is expected to be paid.
Example
The company's receivables increased significantly this quarter.
会社の売掛金は今四半期に大幅に増加しました。
C1 verb /rɪˈdʒɛnəreɪt/

regenerate

再生する
Meaning
to grow or produce again; to renew or restore
Example
The lizard can regenerate its lost tail.
トカゲは失われた尾を再生できます。
A2 noun /roʊl/

role

役割
Meaning
a part or function of something
Example
Her role in the project was crucial.
彼女のプロジェクトでの役割は重要でした。
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.
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。
A2 noun /ˈriːdər/

reader

読者
Meaning
a person who reads or who is capable of reading
Example
She is a fast reader, finishing books in a day.
彼女は速読者で、1日で本を読み終えます。
C1 verb /rɪˈkuːpəreɪt/

recuperate

回復する
Meaning
to recover from illness or regain strength
Example
She went to the countryside to recuperate after surgery.
彼女は手術後、回復するために田舎に行った。
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。
A2 noun /ruːl/

rule

規則
Meaning
an accepted principle or instruction that states what is allowed or what must be done.
Example
There are strict rules about safety in the lab.
実験室には安全に関する厳しい規則があります。
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。
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。
A2 noun /ˈrɛkɔːd/

record

記録
Meaning
a written or spoken account of something
Example
I kept a record of all the meetings.
私はすべての会議の記録を保持していました。
C1 verb /riˈdʒɔɪn/

rejoin

再参加する
Meaning
to join again or return to a group, place, or activity
Example
After a short break, she decided to rejoin the team.
短い休憩後、彼女はチームに再参加することに決めました。
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。
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。
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。
C1 verb /reɪz/

raze

取り壊す
Meaning
To completely destroy or demolish something, especially a building.
Example
The old factory was razed to make way for new apartments.
古い工場は新しいアパートメントのために取り壊されました。
B2 verb /ˈreɡjəleɪt/

regulate

規制する
Meaning
to control or maintain according to rules or laws
Example
The government regulates food safety.
政府は食品安全を規制しています。
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。
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 verb /ˌriː.kənˈviːn/

reconvene

再開する
Meaning
to gather or assemble again, especially for a meeting
Example
The committee will reconvene after lunch.
委員会は昼食後に再開します。
C1 verb /ˌrevəˈluːʃənaɪz/

revolutionize

革命的に変える
Meaning
Change (something) radically or fundamentally.
Example
Artificial intelligence is set to revolutionize the healthcare sector.
人工知能は医療分野を革命化する準備ができています。
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 /rɪm/

rim

縁
Meaning
the outer edge or border of a circular object
Example
The coffee cup had a chip on its rim.
コーヒーカップの縁にひびが入っていました。
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。
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。
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 /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 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。
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。
B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

強化
Meaning
Strengthening or supporting something, especially behavior or learning.
Example
Positive reinforcement helps in learning.
積極的な強化は学習に役立ちます。
C1 verb /ˈrʌf.l̩/

ruffle

Meaning
to disturb the smoothness of something; to annoy or upset someone
Example
The wind ruffled her hair.
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.
B2 noun /red liːf/

Red leaf

赤い葉
Meaning
red-colored leafy vegetable; amaranth leaves used as greens
Example
Red leaf is rich in iron and is commonly eaten in Bengali households.
赤い葉は鉄分が豊富で、ベンガルの家庭でよく食べられます。
C2 noun /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 noun /ruːz/

Ruse

策略; 騙し
Meaning
an action intended to deceive someone; a trick or stratagem
Example
The thief used a clever ruse to distract the guard.
泥棒は警備員を惑わすために巧妙な策略を使った。
B2 noun /ˈreɪ.zən/

Raisin

レーズン
Meaning
dried grape
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。
C1 adjective /rɪˈzɪstɪv/

resistive

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

Respective

それぞれの; 各自の
Meaning
belonging to each individual; particular to each
Example
The students returned to their respective classrooms after lunch.
学生たちは昼食後、それぞれの教室に戻った。
C1 adjective /ˈrʌɡ.ɪd/

Rugged

でこぼこで不規則な; 不規則な表面を持つ; 強くて丈夫な
Meaning
rough and uneven; having a rough irregular surface; tough and strong
Example
The hikers crossed the rugged mountain terrain.
ハイカーたちは荒れた山岳地帯を越えた。
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。
B1 noun /rɪˈleɪ.ʃən/

Relation

関係; 親戚
Meaning
the way in which two or more people or things are connected; a family member
Example
They have a strong business relation that has lasted for years.
彼らは長年続く強力なビジネス関係を持っています。
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。
A2 noun, verb /raʊ/ (argument), /roʊ/ (line of things)

row

列 / 争い
Meaning
A line of things or people; also, a noisy quarrel; to propel a boat with oars.
Example
They had a loud row about money.
彼らはお金について大声で争いました。
C1 adjective /ˈrɛvərənt/

reverent

敬虔な
Meaning
Showing deep and solemn respect.
Example
They listened to the speech in a reverent silence.
彼らは敬虔な沈黙の中でスピーチを聞いた。
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。
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 /ˈraɪtfəl/

rightful

正当な
Meaning
having a legitimate or just claim; proper or lawful
Example
She is the rightful owner of the property.
彼女はその財産の正当な所有者です。
B2 noun /'ræd.ɪʃ/

Radish

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

Ragged

ボロボロの; 破れた; ぼろぼろ
Meaning
torn; tattered; frayed; shabby
Example
The homeless man wore ragged clothes.
ホームレスの男はボロボロの服を着ていた。
C2 adjective /rɪˈtɪkjʊlət/

reticulate

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