copper
All a b c d e f g h i j k l m n o p q r s t u v w x y z
All CEFR A1 A2 B1 B2 C1 C2
Content locale
EN 英語 BN ベンガル語 HI ヒンディー語 ES スペイン語 FR フランス語 DE ドイツ語 RU ロシア語 ZH 中国語 JA 日本語
All Vocabulary Cards All Vocabularies
B2 noun /ˈkɒpə/

copper

銅
Meaning
a reddish-brown metal used for electrical wiring, coins, and more
Example
Copper is a good conductor of electricity.
銅は良い電気導体です。
C1 noun koʊˈhisɪv ˈjunɪts

cohesive units

結束した単位
Meaning
Groups or organizations that work together as unified wholes, with members closely bound together.
Example
Early humans formed cohesive units for survival.
初期の人類は生存のために結束した単位を作った。
C2 noun /ˈklævɪkəl/

clavicle

鎖骨
Meaning
the collarbone, a long bone that serves as a strut between the shoulder blade and the sternum
Example
He fractured his clavicle in the accident.
彼は事故で鎖骨を骨折した。
C1 noun /ˈkoʊhɔːrt/

cohort

コホート
Meaning
A group of people with a shared characteristic, usually of the same age or with a common experience.
Example
The study tracked a cohort of students over ten years.
その研究は10年にわたり学生のコホートを追跡しました。
A2 noun, adjective /ˈkrɪstʃən/

christian

クリスチャン
Meaning
a person who follows the religion based on the teachings of Jesus Christ
Example
She is a devoted Christian who attends church every Sunday.
彼女は毎週日曜日に教会に行く献身的なクリスチャンです。
A2 adjective /kəˈneɪdiən/

canadian

カナダの
Meaning
Relating to Canada or its people.
Example
She enjoys Canadian culture and traditions.
彼女はカナダの文化と伝統を楽しんでいます。
C2 adjective /ˈsɜːrkəmskraɪbd/

circumscribed

制限された
Meaning
restricted or limited in scope or freedom
Example
Her freedom of choice was circumscribed by social rules.
彼女の選択の自由は社会的なルールによって制限されていた。
C1 verb /tʃɑːr/

char

焦げる
Meaning
To burn or scorch something so that it becomes blackened.
Example
The cook accidentally charred the steak.
シェフはステーキを焼きすぎてしまった。
A1 noun /tʃeər/

Chair

椅子
Meaning
a separate seat for one person, typically with a back and four legs
Example
Please sit on the chair.
椅子に座ってください。
C1 noun /ˈkoʊhɔːrts/

cohorts

コホート
Meaning
Groups of people who share a common feature or experience.
Example
Researchers compared the health outcomes of different cohorts.
研究者たちは異なるコホートの健康結果を比較しました。
B2 noun /ˌkɑm.pənˈseɪ.ʃən/

Compensation

補償; 報酬
Meaning
something given or received as an equivalent for services, debt, loss, injury, or suffering; payment or reward
Example
The company provided financial compensation to the workers injured in the accident.
会社は事故で負傷した労働者に対して経済的な補償を提供しました。
B2 adjective /kənˈsɜːvətɪv/

conservative

保守的な
Meaning
Favoring traditional views and values; resistant to change.
Example
He has conservative views on family and society.
彼は家族と社会について保守的な見解を持っている。
C1 noun /ˈkɒmən kɑːp/

Common Carp

コイ
Meaning
A large freshwater fish widely cultivated for food
Example
Common carp is an important fish in aquaculture.
コイは養殖業で重要な魚です。
C1 noun /ˈtʃæplɪn/

chaplain

チャプレン
Meaning
A member of the clergy attached to a private chapel, institution, hospital, or military unit.
Example
The army chaplain offered prayers before the battle.
軍のチャプレンは戦闘前に祈りを捧げました。
C2 verb /ˈtʃɔːrtl/

chortle

喜んで笑う
Meaning
to laugh in a breathy, gleeful way
Example
The audience chortled at the comedian's witty remarks.
観客はコメディアンのウィットに富んだコメントにクスクスと笑った。
C2 noun /ˈkæθoʊd/

cathode

陰極
Meaning
The negative electrode in a device such as a battery or tube, where electrons enter.
Example
The cathode emits electrons in the tube.
カソードはチューブ内で電子を放出します。
C1 noun /krɪpt/

crypt

地下室
Meaning
an underground chamber, especially one beneath a church, used as a burial place
Example
The tourists explored the ancient crypt beneath the cathedral.
観光客は大聖堂の下にある古代の地下室を探索しました。
B2 phrase kəˈlek.tɪv ˈæk.ʃən

collective action

集団行動
Meaning
Action taken by a group of people working together toward a common goal or purpose.
Example
Collective action is needed to mitigate climate change.
気候変動を緩和するには、集団行動が必要です。
A2 verb /tʃiːt/

cheat

カンニング
Meaning
to act dishonestly; to break rules for advantage
Example
He cheats on the exam by copying answers.
彼は答えをコピーして試験でカンニングします。
B2 noun /ˌsɜːrtɪfɪˈkeɪʃən/

certification

認定
Meaning
the process of officially recognizing or confirming that something or someone meets required standards; an official document proving qualification
Example
She received her professional certification after completing the training program.
彼女は研修プログラムを修了した後、専門的な認定を取得しました。
C2 noun ˌkɒdʒɪˈteɪʃən

cogitation

熟考, 思索
Meaning
The action of thinking deeply about something; contemplation
Example
After much cogitation, he made the final decision.
熟考の末、彼は最終的な決定を下しました。
B2 noun/verb /kjuː/

cue

合図
Meaning
A signal or prompt for action; to give a signal.
Example
The actor waited for his cue before entering the stage.
俳優はステージに上がる前にキューを待っていました。
B2 noun /kəmˈplɛksɪti/

complexity

複雑さ
Meaning
The state of being complex; intricacy.
Example
The complexity of the problem required a team of experts.
問題の複雑さは専門家のチームを必要とした。
B2 adjective /keɪˈɒtɪk/

Chaotic

混沌とした; 秩序のない
Meaning
in a state of complete confusion and disorder
Example
The situation became chaotic after the announcement.
発表後、状況はカオティックになった。
B2 noun ˈkɛmɪkəl weɪst

chemical waste

化学廃棄物
Meaning
Waste material from industrial or laboratory processes that contains harmful chemicals.
Example
Chemical waste pollutes water bodies.
化学廃棄物は水域を汚染します。
B2 noun /kəmˈpɑːrt.mənt/

Compartment

車両
Meaning
a separate section or division of a larger space, especially in a train
Example
We found seats in the first-class compartment.
私たちはファーストクラスの車両で席を見つけました。
C2 noun /kwɑːˈfjʊr/

coiffure

髪型
Meaning
A person's hairstyle, typically an elaborate one.
Example
Her elegant coiffure impressed everyone at the party.
彼女のエレガントな髪型はパーティーで皆を感動させました。
B2 verb /kəˈmɛnd/

commend

称賛する
Meaning
to praise formally or officially
Example
The teacher commended the students for their hard work.
先生は生徒たちの努力を称賛しました。
C2 verb /kənˈsɪlieɪt/

conciliate

Meaning
to stop someone from being angry; to win over by friendly acts
Example
He tried to conciliate the angry customer with an apology.
B1 adjective /kəmˈpetətɪv/

competitive

競争的
Meaning
relating to or characterized by competition; having a strong desire to win or be more successful
Example
She has a competitive spirit that drives her to excel.
彼女は競争心にあふれ、それが彼女を卓越に向かわせる。
A2 noun /ˈkændl/

candle

ろうそく
Meaning
a stick of wax with a wick that burns to give light
Example
She lit a candle during the power cut.
停電中に彼女はろうそくを灯しました。
C1 adjective ˌkɑːr.sɪ.nəˈdʒen.ɪk

carcinogenic

発癌性の
Meaning
Having the potential to cause cancer in living tissue.
Example
Processed meat contains carcinogenic compounds.
加工肉には発癌性の化合物が含まれています。
C1 verb /kənˈtɛkstʃuəlaɪz/

contextualize

文脈化する
Meaning
to place something in a context or interpret it in relation to its surroundings
Example
The teacher contextualized the historical event to make it more relevant for students.
先生は歴史的な出来事を学生にとってより関連性のあるものにするために文脈化しました。
C2 noun /ˈkæl.əm.ni/

Calumny

中傷
Meaning
the making of false and defamatory statements about someone in order to damage their reputation
Example
The politician sued the newspaper for spreading calumny about his personal life.
その政治家は自分の私生活に関する中傷を広めた新聞に対して訴訟を起こした。
C1 verb /ˈkrɪstəlaɪz/

crystallize

結晶化する
Meaning
to form crystals; to make an idea or plan clear and definite
Example
Her vague thoughts began to crystallize into a solid plan.
彼女のあいまいな考えは、明確な計画に結晶化し始めた。
B2 noun /ˈkæp.tɪv/

Captive

捕虜
Meaning
a person who has been taken prisoner or an animal that has been confined
Example
The captive was held in a small cell for several months.
捕虜は数ヶ月間小さな部屋に閉じ込められていた。
B2 noun ক্লাইম্যাটিক কন্ডিশন্স

climatic conditions

気候条件
Meaning
The atmospheric or weather patterns of a particular region.
Example
Specific climatic conditions are required for snowfall.
雪が降るためには特定の気候条件が必要です。
B1 noun /ˈkɑn.tent/

Content

満足
Meaning
pleased and satisfied; the things that are contained in something; subject matter of a text
Example
She felt content with her simple life in the countryside.
彼女は田舎でのシンプルな生活に満足していました。
A2 noun /koʊtʃ/

coach

コーチ
Meaning
A person who helps improve others' skills or knowledge.
Example
The football coach motivated his team before the match.
サッカーのコーチは試合前にチームを励ました。
A2 noun /ˈkɒm.ent/

comment

コメント
Meaning
a verbal or written remark expressing an opinion or reaction
Example
She posted a kind comment on my photo.
彼女は私の写真に優しいコメントを投稿しました。
C2 noun /ˌkɑːrt ˈblɑːnʃ/

carte blanche

Meaning
complete freedom to act as one wishes
Example
The manager gave her team carte blanche to design the project.
A2 noun /kriːm/

Cream

クリーム
Meaning
the thick white or pale yellow fatty liquid that rises to the top of milk
Example
She whipped the cream until it became fluffy.
彼女はクリームを泡立てて、ふわふわにしました。
C2 noun /kjuːˈpɪdəti/

cupidity

強欲
Meaning
Excessive desire for wealth or possessions; greed.
Example
The king's downfall was caused by his cupidity.
王の没落は彼の強欲によるものであった。
C2 noun /ʃɪˈkeɪnəri/

chicanery

詐欺
Meaning
The use of trickery or deception to achieve a purpose.
Example
The politician was accused of chicanery to win the election.
その政治家は選挙に勝つために詐欺を使ったとして非難された。
B1 noun ˈkɒnsept

concept

概念
Meaning
An abstract idea or general notion
Example
The concept of chasing two rabbits teaches focus.
二匹のウサギを追いかけるという概念は、集中力を教えます。
C1 verb /ˈkɒŋɡrɪɡeɪt/

congregate

集まる, 集結する
Meaning
to gather together in a group; to assemble
Example
People congregate in the town square every evening.
人々は毎晩町の広場に集まります。
B1 noun /ˈkændɪdeɪt/

candidate

候補者
Meaning
A person who applies for a job or is nominated for election.
Example
The candidate gave a strong speech during the debate.
候補者は討論中に強いスピーチを行いました。
B1 noun /ˈtʃɪl.i/

Chilly/Chilli

寒い; 辛い唐辛子;
Meaning
noticeably cold; a hot-tasting pod of a variety of capsicum, used as a spice
Example
The chef added red chilli to make the curry spicier.
シェフはカレーを辛くするために赤いチリを加えました。
A2 verb /kənˈtɪnjuː/

continue

続ける
Meaning
To keep happening, existing, or doing something without stopping.
Example
The rain will continue throughout the night.
雨は一晩中続きます。
C1 adverb /ˌkɒnfɪˈdenʃəli/

Confidentially

機密に
Meaning
in a confidential manner; secretly; privately
Example
The information was shared confidentially between the two managers.
その情報は2人のマネージャーの間で機密に共有されました。
B2 noun /kənˈdʒʌŋkʃən/

conjunction

接続詞
Meaning
a word used to connect clauses or sentences, or to coordinate words
Example
The words 'and' and 'but' are common conjunctions.
'and' と 'but' は一般的な接続詞です。
B1 noun /kəˈnæl/

canal

運河
Meaning
an artificial waterway constructed for navigation, irrigation, or drainage
Example
The canal was built to help transport goods across the region.
運河は地域内で物資の輸送を助けるために建設されました。
A2 adjective /ˈkʌlərfəl/

colorful

カラフル
Meaning
having bright colors; full of variety or interest
Example
The festival was full of colorful decorations.
その祭りはカラフルな装飾でいっぱいでした。
B2 adjective /ˌkrɒnəˈlɒdʒɪkəl/

chronological

時系列
Meaning
Arranged in the order in which events happened.
Example
The events were listed in chronological order.
イベントは時系列でリストされました。
C1 noun /ˌkɒn.əˈsɜːr/

connoisseur

鑑定家
Meaning
an expert judge in matters of taste, especially in food, art, or wine
Example
She is a true connoisseur of fine art.
彼女は本物の芸術の鑑定家です。
C1 adjective ˈkʌm.bə.səm

cumbersome

重い、扱いにくい、運ぶのが難しい
Meaning
Heavy, unwieldy, difficult to handle or carry.
Example
The cumbersome luggage slowed him down.
重い荷物が彼を遅くした。
B2 adjective /kənˈvɜːrtəbl/

convertible

オープンカー、屋根が折りたためる車
Meaning
able to be changed into a different form or use; also a car with a roof that can be folded down
Example
She drove her new convertible along the coastal road.
彼女は新しいオープンカーで沿岸道路を走った。
C2 adjective /ˈkæloʊ/

callow

未熟
Meaning
Inexperienced and immature.
Example
The callow intern made several mistakes on his first day.
未熟なインターンは最初の日にいくつかの間違いをしました。
B1 noun /ˈkemɪst/

chemist

化学者; 薬剤師
Meaning
a scientist who studies chemistry; a person trained to prepare and dispense medicines
Example
The chemist analyzed the sample to determine its composition.
化学者は成分を特定するために試料を分析した。
B2 noun /ˌkɑː.bəʊˈhaɪ.dreɪts/

carbohydrates

炭水化物
Meaning
Organic compounds consisting of carbon, hydrogen, and oxygen, serving as a primary source of energy for the body.
Example
Whole grains are a great source of healthy carbohydrates.
全粒穀物は健康的なカーボハイドレートの素晴らしい源です。
C2 noun /ˈkuː.li/

Cooly

クーリー
Meaning
a laborer who does physical work for wages
Example
The cooly carried heavy bags at the railway station.
クーリーは駅で重い荷物を運んでいました。
B2 noun /ˈsɜːrkɪt/

circuit

回路 / 電気回路
Meaning
A roughly circular line, route, or movement that starts and ends at the same place; also an electrical pathway.
Example
The runners completed the circuit around the park.
ランナーは公園の周りの回路を完了しました。
C1 noun /ˌkɔr.diˈæl.ɪ.ti/

Cordiality

友情; 優しさ
Meaning
sincere affection and kindness; warm and friendly behavior
Example
The host's cordiality made all the guests feel welcome and comfortable.
ホストのコーディアリティはすべてのゲストが歓迎され、快適に感じさせました。
A2 verb /ˈtʃeɪndʒɪŋ/

changing

変化
Meaning
The act of becoming different; ongoing process of change.
Example
The weather is changing rapidly.
天気は急速に変化しています。
C2 noun /ˌkɒntrəpəˈzɪʃən/

contraposition

対比配置
Meaning
the act of placing two things in opposition for contrast or comparison
Example
The contraposition of the two theories highlighted their differences.
二つの理論の対比配置は、彼らの違いを強調した。
B2 noun /kleɪ/

clay

粘土
Meaning
a natural material made of fine earth that becomes hard when baked, used for making pottery
Example
The artist molded the wet clay into a beautiful vase.
アーティストは湿った粘土を使って美しい花瓶を作りました。
B2 noun /ˌkɒn.tɪˈnjuː.ɪ.ti/

continuity

継続性
Meaning
the state of being continuous or connected; consistency over time
Example
Maintaining continuity in leadership is essential for organizational stability.
リーダーシップにおける継続性の維持は、組織の安定性にとって不可欠です。
C2 noun /kənˈfɛsər/

confessor

告白者
Meaning
A person who confesses sins or secrets, especially to a priest.
Example
The confessor listened patiently to the troubled man.
告白者は困っている男性の話を忍耐強く聞いた。
C1 noun /ˈkʌvənənt/

covenant

契約
Meaning
a formal agreement or promise, often legally binding
Example
The landlord and tenant signed a covenant to maintain the property.
家主と借家人は財産を維持するために契約に署名しました。
C2 verb /kɔːk/

calk

ボートのひび割れを塞ぐ
Meaning
To make a boat or ship watertight by filling seams or cracks.
Example
The workers calked the seams of the old boat to prevent leaks.
作業員たちは古いボートの継ぎ目をコーキングして漏れを防いだ。
B2 verb, noun /ˈkɒntɛst/

contest

競技, 挑戦
Meaning
verb: to compete or challenge; noun: a competition or dispute
Example
She decided to contest the election against the incumbent.
彼女は現職に対して選挙に挑戦することを決定しました。
B2 adjective /kəmˈpʌlsəri/

compulsory

義務的
Meaning
Required by law or a rule; obligatory.
Example
Wearing seat belts is compulsory in most countries.
ほとんどの国でシートベルトを着用することは義務的です。
B2 adjective ˈkʌtɪŋ ˌɛdʒ

cutting-edge

最先端, 革新的, 最先端技術
Meaning
The most advanced or innovative; at the forefront of development.
Example
This company develops cutting-edge technology.
この会社は最先端技術を開発しています。
C1 noun /ˈkæmi.oʊ/

cameo

カメオ
Meaning
a small but significant role in a play, film, or show, often performed by a well-known person
Example
The actor made a surprise cameo in the movie.
その俳優は映画でサプライズのカメオを果たした。
C2 noun /kəˈleɪʃən/

collation

コレクション
Meaning
the act of collecting, comparing, and arranging in proper order
Example
The librarian spent hours on the collation of old manuscripts.
図書館員は古い手稿のコレクションに数時間を費やしました。
C1 adjective, noun /ˈkɑːr.dɪ.nəl/

cardinal

基本的な / 重要な
Meaning
As an adjective: of prime importance; as a noun: a high-ranking Catholic clergyman or a type of bird.
Example
Honesty is a cardinal virtue in life.
正直は人生における重要な美徳です。
C1 verb /ˈkælɪˌbreɪt/

calibrate

Meaning
To adjust or mark something so it can be used accurately; to standardize.
Example
The technician calibrated the machine before starting the experiment.
C1 verb /kənˈtraɪv/

contrive

考案する
Meaning
to plan or devise cleverly or skillfully
Example
She contrived a clever plan to surprise her friends.
彼女は友達を驚かせるために賢い計画を思いついた。
A2 verb /tʃɪər/

cheer

応援する
Meaning
to shout in encouragement or support; to make someone feel happier
Example
The fans cheered loudly when their team scored a goal.
ファンはチームがゴールを決めたとき、大声で応援した。
B2 verb /saɪt/

cite

引用する
Meaning
to quote; to mention as an example or proof
Example
The lawyer cites relevant case law.
弁護士は関連する判例法を引用します。
C2 adjective /krʌˈsteɪʃəs/

crustaceous

硬い殻のある
Meaning
relating to or having a hard shell like a crustacean
Example
The scientist studied the crustaceous fossils.
科学者は硬い殻のある化石を研究しました。
A2 noun /ˈkɒnsət/

concert

コンサート
Meaning
A musical performance given by one or more singers or musicians.
Example
We went to a concert last night and enjoyed the live music.
私たちは昨晩コンサートに行き、ライブ音楽を楽しみました。
B2 noun /ˈkrɪstəl/

crystal

クリスタル
Meaning
a clear, transparent mineral or glass that forms a solid structure with regular patterns
Example
She wore a necklace made of sparkling crystal.
彼女はきらめくクリスタルのネックレスを身につけていました。
C2 verb /kruːn/

croon

優しく低く穏やかな声で歌うまたは歌うこと
Meaning
to sing or hum in a soft, low, and gentle voice
Example
She crooned a lullaby to help the baby fall asleep.
彼女は赤ちゃんを寝かしつけるために子守唄を歌った。
C2 noun /ˈsɜːrtɪˌtjuːd/

certitude

確信
Meaning
Absolute certainty or conviction about something.
Example
She spoke with certitude about the outcome of the case.
彼女は事件の結果について確信を持って話しました。
A2 adverb /kəˈrɛktli/

correctly

正しく
Meaning
in a way that is true, accurate, or without mistakes
Example
She answered all the questions correctly.
彼女はすべての質問に正しく答えました。
C1 verb ˌsɝː.kəmˈvent

circumvent

巧妙に回避する、または障害や規則を回り道する方法を見つける
Meaning
To cleverly avoid or find a way around obstacles or rules.
Example
He tried to circumvent the security system.
彼はセキュリティシステムを回避しようとした。
C1 adjective /kəˈmɛmərətɪv/

commemorative

記念の
Meaning
Serving as a reminder or in honor of a person or event.
Example
They issued a commemorative coin for the independence anniversary.
彼らは独立記念日を祝うために記念コインを発行しました。
A2 verb /kaʊnt/

count

数える
Meaning
to determine the total number of something
Example
She carefully counted the money on the table.
彼女はテーブルの上のお金を慎重に数えた。
B1 noun ˈkɒn.fər.əns

conference

会議
Meaning
A formal meeting of people with a shared interest, typically one that takes place over several days.
Example
The climate conference emphasized renewable energy.
気候会議では再生可能エネルギーが強調されました。
A1 verb /keɪm/

came

来た
Meaning
past tense of 'come'
Example
She came to the party on time.
彼女はパーティーに時間通りに来た。
C1 noun /ˈkroʊ.bɑːr/

Crowbar

バール
Meaning
a heavy iron bar with a curved end used as a lever for prying things apart
Example
He used a crowbar to remove the old nails.
彼は古い釘を取り除くためにクローバーを使いました。
B2 adjective /ˈklɪn.ɪ.kəl/

clinical

臨床的
Meaning
Related to the observation and treatment of patients rather than theoretical study.
Example
The doctor conducted a clinical examination.
医師は臨床検査を行った。
A2 verb /tʃɑːrdʒ/

charge

請求する/告発する
Meaning
to demand payment; to formally accuse; to rush forward aggressively
Example
The store charges extra for home delivery.
その店はホームデリバリーに追加料金を課します。
B2 adjective /kəmˈpætəbl/

compatible

互換性のある
Meaning
Able to exist or work together without conflict; harmonious.
Example
This software is compatible with both Windows and Mac systems.
このソフトウェアはWindowsとMacの両方のシステムと互換性があります。
C2 noun /ˈkɔːrpəskəl/

corpuscle

小さな粒子または細胞、特に赤血球
Meaning
a small particle or cell, especially a blood cell
Example
Red corpuscles carry oxygen throughout the body.
赤血球は体内で酸素を運ぶ。
C2 noun /kəˈnaɪ.vəns/

connivance

共謀
Meaning
the act of secretly allowing or being involved in wrongdoing
Example
The theft happened with the connivance of the security guard.
その窃盗は警備員の共謀で起こった。
C1 noun /ˈklɛmənsi/

clemency

寛容
Meaning
mercy, leniency, or forgiveness shown towards someone
Example
The judge showed clemency and reduced his sentence.
裁判官は寛容を示し、彼の判決を軽減しました。
B2 noun /ˈkɒmpɪtəns/

competence

能力
Meaning
the ability to do something successfully or efficiently
Example
Her competence as a manager impressed the board.
マネージャーとしての彼女の能力は、取締役会に感銘を与えました。
C2 noun /krəˈdjuːlɪti/

credulity

信じやすさ
Meaning
A tendency to be too ready to believe that something is real or true.
Example
The scam succeeded because of the victim's credulity.
詐欺は被害者の信じやすさのおかげで成功した。
C1 noun /ˈtʃaɪ.nə.weər/

China-ware

チャイナウェア
Meaning
dishes, plates, cups, and other tableware made of porcelain or fine ceramic
Example
The expensive china-ware was displayed in the cabinet.
高価なチャイナウェアはキャビネットに展示されていました。
C2 noun /ˈklæŋər/

clangor

音、騒音
Meaning
A loud, resonant, and continuous noise, often metallic.
Example
The clangor of the church bells filled the town square.
教会の鐘の音が町の広場に響き渡った。
C1 noun /ˈsɪtrɪk ˈæsɪd/

Citric Acid

クエン酸
Meaning
a natural acid found in citrus fruits, used as a food preservative and flavoring agent
Example
Add a pinch of citric acid to preserve the color of the fruit jam.
果物ジャムの色を保つためにクエン酸をひとつまみ加えてください。
C1 noun /ˌkɒnfləˈɡreɪʃən/

conflagration

大規模な破壊的な火災
Meaning
A large, destructive fire that destroys a great deal of land or property.
Example
The forest was devastated by a massive conflagration that lasted for days.
その森は数日間続いた巨大な火災によって壊されました。
B2 noun ˌkɒn.fɪ.den.ʃiˈæl.ɪ.ti

confidentiality

機密性
Meaning
The state of keeping or being kept secret or private
Example
Confidentiality is crucial in data security.
機密性はデータセキュリティにおいて重要です。
B2 adjective /ˈkaʊntləs/

countless

数えきれない
Meaning
too many to be counted; innumerable
Example
There are countless stars in the sky.
空には無数の星があります。
C1 adjective /kənˈkluː.sɪv/

Conclusive

決定的な; 最終的な; 問題を完全に解決する
Meaning
final; decisive; settling a matter completely
Example
The evidence was conclusive and left no room for doubt.
その証拠は決定的であり、疑う余地を残さなかった。
B1 noun/verb /ˈkɒmplɪmənt/

compliment

賛辞
Meaning
a polite expression of praise or admiration; to politely praise someone
Example
She complimented him on his excellent presentation.
彼女は彼の素晴らしいプレゼンテーションを褒めました。
C1 noun /ˈkrɛvɪs/

crevice

亀裂
Meaning
a narrow crack or opening, especially in a rock or wall
Example
The lizard hid in a crevice between the stones.
トカゲは石の間の亀裂に隠れていた。
A2 noun/verb /ˈkɒntækt/

contact

接触
Meaning
Communication or connection with someone.
Example
You should contact your doctor if symptoms persist.
症状が続く場合は、医師にコンタクトを取るべきです。
C1 noun /kuː/

coup

クーデター
Meaning
a sudden, decisive action that brings about a change, especially in government
Example
The military staged a coup to overthrow the existing regime.
軍隊は現政権を倒すためにクーデターを起こしました。
A2 noun, verb /kɔɪn/

coin

Meaning
A flat piece of metal used as money; as a verb, to invent a new word or phrase.
Example
The government decided to coin a new term for the program.
B2 adjective /kəʊˈɒpərətɪv/

cooperative

協力的
Meaning
willing to work or act together with others for a common purpose
Example
She was very cooperative during the interview process.
彼女は面接の過程で非常に協力的でした。
C2 noun /ˌkəʊ.əˈles.əns/

coalescence

統合, 結合
Meaning
The process of coming together to form one mass or whole.
Example
The coalescence of different cultures creates diversity.
異なる文化のコアレッセンスは多様性を生み出します。
B2 noun /kənˈfɛkʃəneri/

confectionery

菓子類
Meaning
sweets, candies, and other food items made with sugar
Example
The shop sells a wide variety of confectionery.
その店はさまざまなお菓子を販売しています。
C1 noun /kənˈfɛdərəsi/

confederacy

連邦
Meaning
a group of states, people, or organizations united for a common purpose
Example
The southern states formed a confederacy during the civil war.
南部の州は南北戦争中に連邦を結成しました。
A2 noun kɒsts

Costs

コスト
Meaning
An amount that has to be paid or spent to buy or obtain something.
Example
Reducing costs improves profit margins.
コストを削減すると、利益率が向上します。
B2 adverb /ˈkæʒ.u.ə.li/

Casually

カジュアルに; リラックスして非公式に
Meaning
in a relaxed and informal way; without much thought or preparation
Example
He casually mentioned that he was leaving.
彼はカジュアルに出発することを言った。
B1 noun /ˈkɒtɪdʒ/

cottage

小屋
Meaning
a small simple house, typically in the countryside
Example
They spent their vacation in a cozy cottage by the lake.
彼らは湖のそばの快適な小屋で休暇を過ごしました。
B1 verb /ˈkælkjəˌleɪt/

calculate

計算する
Meaning
to determine by mathematical computation; to estimate
Example
I need to calculate the total cost.
総費用を計算する必要があります。
C1 verb /ˌkaʊntərˈækt/

counteract

反作用
Meaning
to act against something in order to reduce its effect
Example
The medicine helps counteract the side effects of the treatment.
その薬は治療の副作用をカウンターアクトするのに役立ちます。