B2 noun /ˌreɡ.jʊˈleɪ.ʃənz/

regulations

規制

Meaning

Rules or directives made and maintained by an authority.

Example

Strict regulations ensure fair practices.

厳格な規制は公正な慣行を確保します。

B2 noun /ˈrerəti/

Rarity

珍しい状態; 普通でないもの、または希少なもの

Meaning

the state of being rare; something that is uncommon or scarce

Example

The antique vase was a rarity worth thousands of dollars.

その古代の花瓶は、数千ドルの価値がある珍しいものだった。

B2 noun /rɒd/

rod

金属または木材の細長い棒

Meaning

a thin straight bar, especially of metal or wood

Example

He used an iron rod to support the structure.

彼は構造を支えるために鉄のロッドを使いました。

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。

B2 noun /ˌriːprəˈdʌkʃən/

reproduction

再生, 繁殖

Meaning

The process of producing offspring; the act of copying or duplicating.

Example

The textbook included a detailed diagram of human reproduction.

教科書には人間のリプロダクションの詳細な図が含まれていました。

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。

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 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。

B2 noun /ˈrɛlɪvəns/

relevance

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。

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。

B2 noun, verb /ræmp/

ramp

ランプ

Meaning

a sloping surface joining two different levels; as a verb, to increase or rise sharply

Example

The car drove up the ramp into the parking garage.

車は駐車場のランプを上がった。

B2 adjective /ˈruːθ.ləs/

Ruthless

無慈悲な; 残酷な; 情け容赦ない

Meaning

showing no pity or compassion; cruel; merciless

Example

The ruthless dictator showed no mercy to his enemies.

その無慈悲な独裁者は、彼の敵に対して一切の慈悲を示さなかった。

B2 verb /ˌriːəˈreɪndʒ/

rearrange

再配置する

Meaning

to change the order or position of something

Example

She decided to rearrange the furniture in her living room.

彼女はリビングルームの家具を再配置することに決めました。

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。

B2 adjective /ræʃ/

rash

軽率, 無謀

Meaning

Acting quickly without careful consideration; reckless.

Example

It was a rash decision to invest without research.

調査なしで投資するのは無謀な決断だった。

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。

B2 adverb /rɪˈlʌk.tənt.li/

Reluctantly

いやいや

Meaning

in an unwilling manner; with hesitation or resistance

Example

She reluctantly agreed to help with the project.

彼女はプロジェクトを手伝うことに渋々同意した。

B2 adjective /ˈruː.mi/

Roomy

広々とした; 広いスペースのある

Meaning

spacious; having a lot of room

Example

The apartment is very roomy with spacious bedrooms.

アパートメントは広々としており、広いベッドルームがあります。

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。

B2 verb /rɪˈvoʊlt/

revolt

反乱する

Meaning

to rebel against authority; to feel disgust

Example

The people revolted against the corrupt government.

人々は腐敗した政府に反乱を起こしました。

B2 verb /rɪˈliːv/

relieve

Meaning

to make pain, distress, or difficulty less severe or serious

Example

The medicine helped relieve his headache.

B2 verb /rɪˈkleɪm/

reclaim

Meaning

To take back or recover something; to restore to a usable state.

Example

The farmer worked to reclaim the barren land.

B2 noun /rɪˈfɔːr.mər/

Reformer

改革者

Meaning

a person who works to bring about positive changes in society or institutions

Example

The social reformer dedicated her life to improving education for all children.

社会的な改革者は、すべての子供たちの教育を改善するために自分の人生を捧げました。

B2 verb /rɪˈstrɪkt/

restrict

制限する

Meaning

To limit the size, amount, or range of something.

Example

The government decided to restrict the use of plastic bags.

政府はプラスチック袋の使用を制限することを決定しました。

B2 noun rɪˈpʌb.lɪk

republic

共和国

Meaning

A state in which supreme power is held by the people and their elected representatives, with an elected or nominated president rather than a monarch.

Example

A republic is governed by representatives of the people.

共和国は人民の代表者によって治められています。

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 /'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。

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 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 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 noun /ræntʃ/

ranch

牧場

Meaning

a large farm where animals such as cattle or sheep are raised

Example

They own a huge cattle ranch in Texas.

彼らはテキサスで巨大な牧場を所有しています。

B2 verb /reɪd/

raid

踏み込む

Meaning

to attack suddenly; to search and seize

Example

Police raid the illegal gambling house.

警察は違法なギャンブルの家に踏み込む。

B2 adjective /ˈrɑː.ki/

Rocky

岩だらけの; 不安定な; 難しい

Meaning

full of rocks; unsteady; difficult

Example

The rocky path made hiking difficult for the tourists.

岩だらけの道は観光客のハイキングを難しくしました。

B2 noun /ˌrɪəlɪˈzeɪʃən/

realization

実現

Meaning

the act of becoming fully aware of something as a fact

Example

Her realization of the problem helped solve the issue.

彼女の問題の認識が問題解決に役立った。

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。

B2 verb /rɪˈnuː/

renew

Meaning

to make something new again or extend its period of validity

Example

I need to renew my passport before traveling.

B2 verb /rɪˈkruːt/

recruit

採用する

Meaning

to enlist or hire people for a job, service, or membership

Example

The company is trying to recruit more software engineers.

その会社はもっと多くのソフトウェアエンジニアをリクルートしようとしています。

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。

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。

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。

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 adjective /ˈrʌs.ti/

Rusty

錆びた; 練習不足; 最近の練習不足による障害

Meaning

affected by rust; out of practice; impaired by lack of recent practice

Example

My piano skills are rusty after not playing for years.

何年もピアノを弾いていなかったので、私のピアノのスキルは錆びついています。

B2 noun /rɪˈmuː.vəl/

Removal

撤去; 除去; 解雇;

Meaning

the action of taking something away or eliminating it; dismissal from office

Example

The removal of the old furniture took all day.

古い家具の除去に一日中かかりました。

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。

B2 verb /riːp/

reap

収穫する

Meaning

to cut or gather a crop; to receive as a consequence of actions

Example

Farmers reap wheat in the late summer.

農家は晩夏に小麦を収穫します。

B2 adjective /rɪˈstrɪk.tɪd/

Restricted

制限された; 制御された; 制限付き

Meaning

limited or controlled; subject to restrictions

Example

Access to this area is restricted to authorized personnel only.

このエリアへのアクセスは、認可されたスタッフのみが制限されています。

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 verb /rɪˈvɜːs/

reverse

反転する

Meaning

to change something to the opposite direction, position, or result

Example

She quickly reversed the car out of the driveway.

彼女はすぐに車をドライブウェイからバックさせました。

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。

B2 verb /rɪˈvɜːrt/

revert

戻る

Meaning

to return to a previous state, condition, or practice

Example

The system will revert to its original settings after the update.

システムは更新後、元の設定に戻ります。

B2 noun/verb rɪˈfɔːm

reform

改革

Meaning

Make changes in (something, typically a social, political, or economic institution or practice) in order to improve it.

Example

Reform in the education system was a priority.

教育システムの改革は優先事項でした。

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 verb /rɪˈfreʃ/

refresh

リフレッシュする

Meaning

to make fresh again; to restore energy

Example

A cold drink refreshes me on hot days.

暑い日には冷たい飲み物が私をリフレッシュさせます。

B2 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。

B2 noun /rɪˈlʌk.təns/

Reluctance

嫌悪感; ためらい

Meaning

unwillingness to do something; hesitation

Example

He showed reluctance to accept the job offer.

彼は仕事のオファーを受け入れることに嫌悪感を示した。

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 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。

B2 adjective /rɪˈspek.tə.bəl/

Respectable

尊敬すべき

Meaning

worthy of respect; having good reputation; decent

Example

He comes from a respectable family in the community.

彼は地域社会の尊敬すべき家族から来ました。

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。

B2 verb /rɪˈzuːm/

resume

再開する

Meaning

to start again after a pause or interruption

Example

We will resume the meeting after lunch.

ランチの後に会議を再開します。

B2 verb /ˈrendər/

render

提供する

Meaning

to provide or give; to make or cause to become

Example

The artist renders the scene beautifully.

アーティストはシーンを美しく表現します。

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。

B2 noun /ˈrʊki/

rookie

初心者

Meaning

a person who is new to an activity or organization; a beginner

Example

The rookie policeman made a few mistakes on his first day.

新米警官は初日にいくつかのミスを犯しました。

B2 adverb /ˈræp.ɪd.li/

Rapidly

速やかに; 急速に

Meaning

at a fast speed; quickly

Example

The company is rapidly expanding into new markets.

会社は新しい市場に急速に拡大しています。

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 /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。

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。

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 /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。

B2 noun rɪsk ˈfæktər

risk factor

リスク要因

Meaning

Something that increases the likelihood of developing a disease or condition

Example

Water pollution is a significant risk factor for health.

水質汚染は健康にとって重要なリスク要因です。

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。

B2 noun, verb, adjective /ræŋk/

rank

ランク

Meaning

A position in a hierarchy; to place in order according to importance or quality.

Example

She quickly rose to a senior rank in the company.

彼女は会社で素早く上級ランクに昇進しました。

B2 noun /ˈreb.əl/

Rebel

反逆者

Meaning

a person who resists authority or control

Example

The young rebel refused to follow the school rules.

その若い反逆者は学校の規則に従うことを拒否した。

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。

B2 noun /roʊst/

Roast

ロースト肉

Meaning

Meat cooked by dry heat in an oven or over an open fire

Example

The Sunday roast was perfectly cooked and very tender.

日曜日のローストは完璧に調理され、とても柔らかかった。

B2 verb /ˈrɛnəˌveɪt/

renovate

改装する

Meaning

to restore something old to a good state or to improve it

Example

They decided to renovate the old house before moving in.

彼らは引っ越す前に古い家を改装することに決めました。

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 adverb /ˈred.ɪ.li/

Readily

快く; 簡単に; ためらわずに

Meaning

willingly; easily; without hesitation

Example

She readily agreed to help with the project.

彼女は喜んでプロジェクトを手伝うことに同意した。

B2 noun /rɛlm/

realm

Meaning

A kingdom or domain; a field or area of activity or interest.

Example

He is well known in the realm of science.

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 /rɪˈmeɪnz/

remains

遺物

Meaning

the parts, pieces, or substances that are left after the rest has been used or removed

Example

The remains of the meal were left on the table.

食事の残り物はテーブルに残されていた。

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。

B2 verb /rɪˈtriːt/

retreat

撤退する

Meaning

to move back or withdraw from a position or situation

Example

The soldiers had to retreat after losing the battle.

兵士たちは戦いに負けた後、撤退しなければならなかった。

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 verb /ˈrʌm.bəl/

rumble

幸せ

Meaning

to make a continuous deep, resonant sound

Example

Thunder rumbled in the distance.

彼女は賞を受け取ったとき、自分の幸せを隠すことができませんでした。

B2 verb /ˌriːəˈʃʊr/

reassure

安心させる

Meaning

to say or do something to remove someone's doubts or fears

Example

The teacher reassured the students before the exam.

教師は試験前に生徒を安心させました。

B2 noun /rɪˈdʒɛkʃən/

rejection

拒絶

Meaning

the action of refusing or dismissing something or someone

Example

Her rejection of the offer surprised everyone.

彼女の提案の拒絶は皆を驚かせた。

B2 verb /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。

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。

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.

B2 adjective /rɪˈmuːvəbəl/

removable

取り外し可能な

Meaning

able to be removed or taken away

Example

This phone has a removable battery.

この電話には取り外し可能なバッテリーがあります。

B2 noun /reɪdʒ/

rage

怒り

Meaning

intense anger or fury

Example

She shouted in a fit of rage after hearing the news.

彼女はそのニュースを聞いて怒りの叫び声を上げました。

B2 noun /ræk/

Rack

ラック

Meaning

a framework or structure for holding or storing things

Example

She hung her coat on the rack by the door.

彼女はドアの横のラックにコートを掛けた。

B2 adverb /ruːˈtiːnli/

routinely

定期的に

Meaning

as part of a regular procedure; habitually

Example

The staff routinely checks the equipment for safety.

スタッフは定期的に安全のために機器を点検します。

B2 noun /ˈruːmər/

Rumour

噂; ゴシップ; ニュース

Meaning

a currently circulating story or report of uncertain or doubtful truth; gossip

Example

There's a rumour that the company will close next month.

会社が来月閉鎖されるという噂があります。

B2 noun /reɪˈʒiːm/

regime

政権

Meaning

a system or form of government, often authoritarian

Example

The military regime controlled the country for decades.

軍事政権は数十年間国を支配していました。

B2 verb /rɪˈkɜːr/

recur

Meaning

to happen again, especially repeatedly or at regular intervals

Example

The headache tends to recur every few weeks.

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。

B2 adjective ˌrev.əˈluː.ʃən.ər.i

revolutionary

革命的な

Meaning

Involving or causing a complete or dramatic change.

Example

Revolutionary ideas are reshaping the industry.

革命的なアイデアが業界を再編成しています。

B2 verb /rɪˈkʌvərɪŋ/

recovering

回復

Meaning

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

Example

She is still recovering from the flu.

彼女はまだインフルエンザから回復しています。

B2 noun /ˈreɪtɪŋ/

rating

評価

Meaning

an evaluation or assessment, usually numerical

Example

The movie received a high rating from critics.

その映画は批評家から高い評価を受けました。

B2 noun /ˌrɛɡ.jʊˈleɪ.ʃən/

regulation

権限によって作成され、維持される規則または指示

Meaning

A rule or directive made and maintained by an authority.

Example

Government regulation ensures fair business practices.

政府の規制は公平なビジネス慣行を確保します。

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 /rɪˈfaɪnd/

Refined

洗練された; 精製された

Meaning

elegant and cultured in appearance, manner, or taste; purified

Example

She has very refined taste in art and music.

彼女は芸術と音楽に非常に洗練された趣味を持っています。

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 noun, verb /ˈrætəl/

rattle

ガタガタ鳴る；ガラガラ

Meaning

to make a rapid series of short, sharp sounds; a device or object that makes such a sound

Example

The loose window began to rattle in the strong wind.

強い風で緩んだ窓がガタガタ鳴り始めた。

B2 noun, verb /ræŋks/

ranks

ランク

Meaning

Positions within a group, especially in a hierarchy or organization.

Example

He quickly moved up the ranks of the army.

彼はすぐに軍隊のランクで上昇しました。

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 /rɪˈstreɪnt/

Restraint

抑制; 自制

Meaning

the action of keeping someone or something under control; self-control

Example

She showed great restraint in not responding to the criticism.

彼女は批判に反応しなかったことに大きな自制心を見せた。

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。

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 /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。

B2 noun /ˈrɪk.ʃɔː/

Rickshaw

リクシャ

Meaning

a light two-wheeled passenger vehicle drawn by one or more people

Example

We took a rickshaw to reach the busy marketplace.

忙しい市場に到着するためにリクシャを利用しました。

B2 noun /ˈreɪn.dʒər/

ranger

レンジャー

Meaning

A person responsible for protecting and managing forests, parks, or natural areas.

Example

The park ranger guided the tourists through the forest trail.

公園のレンジャーは観光客を森の小道を案内しました。

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。

B2 verb /reɪp/

rape

強姦

Meaning

to force someone to have sexual intercourse without their consent

Example

The law strictly punishes those who commit rape.

法律は強姦を犯した者に厳罰を与えます。

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。

B2 noun /rɪˈvaɪ.vəl/

Revival

復活

Meaning

an improvement in the condition or strength of something; renewed interest in or attention to something

Example

There has been a revival of interest in traditional crafts.

伝統的な工芸への関心が復活しました。

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。

B2 noun /rɪˈbel.jən/

Rebellion

反乱

Meaning

an act of armed resistance to an established government or leader

Example

The rebellion against the king lasted for three years.

王に対する反乱は3年間続いた。