volatility
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C1 noun ˌvɒl.əˈtɪl.ɪ.ti

volatility

変動性
Meaning
Liability to change rapidly and unpredictably, especially for the worse; instability.
Example
The stock market's volatility makes investment risky.
株式市場の変動性は投資を危険にする。
C2 noun /ˌfɑːrməkəˈpiːə/

pharmacopoeia

薬典
Meaning
An official book listing medicinal drugs, their effects, and directions for use.
Example
The doctor referred to the pharmacopoeia to check the drug's proper dosage.
医師は薬典を参照して、薬の適切な用量を確認しました。
C2 verb /dʒaɪb/

gibe

嘲笑する
Meaning
To make insulting or mocking remarks; to taunt.
Example
The fans gibed at the losing team.
ファンは負けたチームを嘲笑しました。
B1 adjective /ˈblʌdi/

bloody

血まみれ
Meaning
covered in, involving, or containing blood; also used informally for emphasis in British English.
Example
The soldier returned from battle with a bloody arm.
兵士は戦いから血まみれの腕で帰還しました。
C1 noun, verb /ˈliːvər/ or /ˈlɛvər/

lever

てこの原理, かたくなな棒
Meaning
a rigid bar used to move or lift heavy objects; to move something using leverage.
Example
He used a lever to lift the heavy stone.
彼は重い石を持ち上げるためにレバーを使いました。
C2 adjective /ˈlɪsəm/

lissome

細く、しなやかで優雅な動き
Meaning
Thin, supple, and graceful in movement.
Example
The dancer moved with a lissome elegance.
ダンサーはリソムな優雅さで動いていました。
B2 noun /mɪnt/

Mint

ミント; 金貨の鋳造所
Meaning
An aromatic plant used for flavoring; also a place where money is manufactured
Example
She added fresh mint leaves to the tea for a refreshing taste.
彼女はお茶に新鮮なミントの葉を加えて、さわやかな味を加えました。
C1 verb /rɪˈklaɪn/

recline

リクライニングする
Meaning
To lean or lie back in a relaxed position.
Example
She reclined on the sofa with a book.
彼女はソファで本を持ってリクライニングしていた。
C1 noun /ˈæŋɡwɪʃ/

anguish

苦悩
Meaning
Severe mental or physical pain or suffering.
Example
She was in deep anguish after hearing the tragic news.
悲しい知らせを聞いて、彼女は深い苦悩に沈んだ。
B1 verb /əˈrɛst/

arrest

逮捕する
Meaning
to catch and hold by legal authority; to stop suddenly
Example
The police will arrest the suspect tomorrow.
警察は明日容疑者を逮捕する予定です。
A2 verb /rɪˈdjuːs/

reduce

減らす
Meaning
to make smaller in size, amount, or degree; to decrease
Example
We need to reduce our expenses this month.
今月は支出を減らす必要があります。
C1 noun /sɪˈnɪləti/

senility

老衰
Meaning
The state of being old and showing the weaknesses of age, especially mental decline.
Example
His forgetfulness was attributed to senility.
彼の忘れっぽさは老衰によるものとされました。
C2 adverb /əˈmʌk/

amuck

無秩序に
Meaning
in a frenzied, uncontrolled, or chaotic manner
Example
The bull ran amuck through the village.
雄牛は村を無秩序に走り回った。
B2 verb /ɪnˈfɜːr/

infer

Meaning
to conclude or deduce something from evidence and reasoning rather than from explicit statements
Example
From his silence, I inferred that he was not happy with the decision.
C1 adjective /ˌʌnprɪˈtɛnʃəs/

unpretentious

控えめな
Meaning
modest; not attempting to impress others with appearance or importance
Example
She lives in an unpretentious home but is very happy.
彼女は控えめな家に住んでいますが、とても幸せです。
C1 noun /ˈɛspiənɑːʒ/

espionage

スパイ活動
Meaning
The practice of spying or using spies to gather secret information, usually for political or military purposes.
Example
The agent was arrested on charges of espionage against the state.
そのエージェントは国家に対するスパイ活動の容疑で逮捕されました。
B2 verb /ʃʌv/

shove

押す
Meaning
to push someone or something roughly
Example
He shoved the box into the corner.
彼は箱を隅に押し込んだ。
B2 noun /ˈliːf.lət/

Leaflet

チラシ; 広告
Meaning
a printed sheet of paper containing information or advertising and usually distributed free
Example
She handed out leaflets about the environmental campaign.
彼女は環境運動についてのチラシを配布しました。
B2 noun ˈtraɪəmf

triumph

勝利
Meaning
A great victory or achievement.
Example
The novel is considered one of Dickens' greatest triumphs.
その小説はディケンズの最も偉大な勝利の一つと見なされています。
C2 noun /ˌkɒnfəˈriː/

conferee

会議参加者
Meaning
a person who takes part in a conference
Example
Each conferee received a badge at the registration desk.
各会議参加者は登録デスクでバッジを受け取りました。
B2 preposition /əˈmɪd/

amid

中で
Meaning
in the middle of or surrounded by something
Example
The team stayed calm amid the chaos.
チームは混乱の中で冷静を保った。
C2 noun /ˈfrɛs.koʊ/

fresco

フレスコ画
Meaning
A painting done rapidly in watercolor on wet plaster so that the colors penetrate the surface
Example
The church walls were decorated with beautiful frescoes.
教会の壁は美しいフレスコ画で飾られていました。
C2 noun /ˈkɪldʒɔɪ/

killjoy

空気を壊す人
Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
パーティーで空気を壊す人にならないで。
C1 adverb /ˈpiːs.miːl/

Piecemeal

少しずつ; 一度に一部分
Meaning
done or made gradually, one piece at a time; fragmentary; unsystematic
Example
The renovation was done piecemeal over several years due to budget constraints.
予算制約のため、改修工事は数年にわたって少しずつ行われました。
A2 adverb /bɪˈjɒnd/

Beyond

超えて; 定められた範囲を越える;
Meaning
further away than; exceeding; more than
Example
The mountains stretched beyond the horizon.
山々は地平線を越えて広がっていた。
C1 noun /ˈtoʊ.pæz/

Topaz

トパーズ
Meaning
a precious stone, typically colorless, yellow, or blue, used in jewelry
Example
The queen's crown was adorned with a magnificent blue topaz.
女王の王冠は素晴らしい青いトパーズで飾られていました。
B2 verb ˈɪmplɪmentɪd

implemented

実施された
Meaning
Put a decision or plan into effect; carried out or executed.
Example
The master plans were partially implemented.
マスタープランは部分的に実施されました。
C1 adjective /ˈmeʒ.ər.ə.bəl/

Measurable

測定可能な; 定量的な
Meaning
able to be measured; quantifiable
Example
The project's success was measurable by increased sales.
プロジェクトの成功は売上の増加で測定可能でした。
C1 adjective /ˈdaɪ.si/

dicey

危険な
Meaning
Risky or unpredictable; potentially dangerous.
Example
Investing in that company looks pretty dicey right now.
その会社への投資は今、かなり危険なように見える。
B2 noun /ˈbækdrɒp/

backdrop

背景
Meaning
a painted cloth or other structure used behind a stage
Example
The backdrop for the play was a beautiful mountain scene.
その舞台の背景は美しい山の景色でした。
B2 verb /bɪˈfrɛnd/

befriend

友達になる
Meaning
to act as a friend to someone; to make friends with
Example
She befriended the new student at school.
彼女は学校で新しい生徒と友達になった。
C2 verb /ɪkˈspʌndʒ/

expunge

削除
Meaning
To erase or remove completely, often something unwanted.
Example
He managed to expunge the embarrassing memory from his mind.
彼は恥ずかしい記憶を心から消し去ることに成功しました。
C1 adjective /dɪˈraɪsɪv/

derisive

軽蔑的な
Meaning
Expressing contempt or ridicule.
Example
She gave a derisive laugh at his attempt to sing.
彼女は彼の歌おうとする試みに対して軽蔑的な笑い声を上げた。
C2 adjective /ˈbɪliəs/

bilious

胆汁の
Meaning
Relating to bile or an ill-tempered, irritable disposition.
Example
He became bilious after hearing the unfair criticism.
不公平な批判を聞いた後、彼は怒りっぽくなった。
B2 noun /ˈʃɔːrt.kʌm.ɪŋ/

Shortcoming

欠点; 不足; 短所
Meaning
a fault or failure to meet a certain standard; a deficiency
Example
Despite his many talents, he has some shortcomings.
彼の多くの才能にもかかわらず、いくつかの欠点があります。
B1 noun /soʊl/

Soul

魂
Meaning
the spiritual or immaterial essence of a human being or animal; a person's emotional or intellectual nature
Example
She poured her heart and soul into her artwork.
彼女は芸術作品に心と魂を込めました。
C2 noun ˌɛr.jʊˈdɪʃ.ən

erudition

博学
Meaning
The quality of having or showing great knowledge or learning; scholarship.
Example
His erudition in history impressed the entire audience.
彼の歴史に関する博学は全ての聴衆を感心させた。
C1 adjective /ˈɡʌsti/

gusty

風の強い
Meaning
characterized by strong, sudden bursts of wind
Example
It was a cold, gusty day by the sea.
海辺では寒くて風の強い日でした。
C2 verb /fɔːrˈboʊd/

forebode

予兆する
Meaning
To predict or have a strong inner feeling of a future misfortune or evil.
Example
Dark clouds forebode a coming storm.
暗い雲が来る嵐を予兆している。
B2 noun /ˌæk.wɪˈzɪʃ.ən/

Acquisition

獲得, 取得
Meaning
An asset or object bought or obtained, typically by a library or museum.
Example
The company's acquisition strategy boosted growth.
会社の獲得戦略は成長を促進しました。
B2 verb /kənˈsɒl.ɪ.deɪt/

consolidate

統合する
Meaning
To combine things in order to make them more effective or easier to handle.
Example
The company aims to consolidate its market position.
会社は市場の地位を統合することを目指しています。
C1 noun /ˈpiːɒn/

peon

ピオン
Meaning
a low-ranking worker, often performing menial tasks
Example
The office peon delivered the files to each department.
オフィスのピオンは各部署にファイルを届けました。
B2 noun kəˌlæbəˈreɪʃən

collaboration

協力
Meaning
The action of working with someone to produce or create something
Example
International collaboration is necessary to fight pollution.
国際的な協力は汚染と戦うために必要です。
B2 noun /ˈtriːti/

Treaty

条約
Meaning
a formally concluded and ratified agreement between countries or states
Example
The peace treaty was signed after years of negotiations.
平和条約は長年の交渉後に署名されました。
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。
C1 noun /ˈsɪləbəl/

syllable

音節
Meaning
A unit of pronunciation having one vowel sound, with or without surrounding consonants, forming the whole or part of a word.
Example
The word 'computer' has three syllables.
‘コンピュータ’という言葉は3つの音節から成り立っています。
C2 noun /ˈdɛkəˌɡræm/

decagram

デカグラム
Meaning
A metric unit of mass equal to ten grams.
Example
The package weighed exactly one decagram.
そのパッケージはちょうど1デカグラムの重さでした。
B2 adjective /ˈstɜːrdi/

sturdy

頑丈
Meaning
strongly and solidly built; not easily weakened
Example
The carpenter made a sturdy wooden table.
大工は頑丈な木製のテーブルを作った。
C2 adjective /ˈpɔːntʃi/

paunchy

ぽっこりお腹
Meaning
Having a large or protruding belly.
Example
The paunchy man struggled to button his shirt.
ぽっこりお腹の男はシャツのボタンを留めるのに苦労していた。
B1 noun /ˈvæk.siːn/

Vaccine

ワクチン
Meaning
a substance that is put into the body to prevent a disease
Example
The COVID-19 vaccine has helped reduce severe illness.
COVID-19ワクチンは重篤な病気を減少させるのに役立っています。
B2 noun /kæf/

Calf

子牛
Meaning
a young cow or bull; young of various large mammals
Example
The calf stayed close to its mother.
子牛は母親の近くにいました。
B1 noun /pɑːrˌtɪsɪˈpeɪʃən/

participation

参加
Meaning
the action of taking part in something
Example
Her participation in the competition was commendable.
彼女の競技会への参加は称賛に値しました。
C1 adjective /ɪnˈflæməbəl/

Inflammable

可燃; 発火性
Meaning
easily set on fire; flammable; combustible
Example
The inflammable material caught fire quickly.
その可燃性材料はすぐに火をつけました。
C1 noun /prəˈvaɪzoʊ/

proviso

条件
Meaning
a condition or stipulation attached to an agreement
Example
He accepted the job offer with the proviso that he could work remotely twice a week.
彼は、週に2回リモートで働けるという条件で仕事のオファーを受け入れました。
C1 noun ɪˌræd.ɪˈkeɪ.ʃən

eradication

根絶
Meaning
The complete destruction or elimination of something unwanted.
Example
Carbon eradication is a key goal of the project.
カーボンの根絶はプロジェクトの重要な目標です。
B2 adjective /praɪm/

prime

最優先, 重要な
Meaning
Of the best quality; most important; peak condition.
Example
She is in the prime of her career.
彼女はキャリアの最良の時期にいます。
C2 adjective /ʌnəˈpiːzd/

unappeased

満足していない
Meaning
Not satisfied or calmed; still feeling discontent or anger
Example
Despite the apology, she remained unappeased.
謝罪にもかかわらず、彼女は満足していなかった。
A1 noun /bæk/

Back

背中
Meaning
the rear surface of the human body from the shoulders to the hips; the spine
Example
She hurt her back while lifting heavy boxes.
彼女は重い箱を持ち上げているときに背中を痛めました。
C1 verb /ˈiːvzdrɒp/

eavesdrop

盗み聞き
Meaning
to secretly listen to a conversation
Example
She stood near the door to eavesdrop on their conversation.
彼女はその会話をこっそり聞くためにドアの近くに立っていました。
C2 verb /ˌdɪskəmˈbɑːbjuleɪt/

discombobulate

混乱させる
Meaning
to confuse or disconcert; to upset the normal order
Example
The sudden question seemed to discombobulate him.
突然の質問が彼を混乱させたようだ。
C1 adjective /ˌʌnəˈdɔːrnd/

unadorned

シンプルな、飾りのない
Meaning
Plain and simple; not decorated.
Example
The room was unadorned, with only a table and a chair.
部屋はシンプルで、テーブルと椅子だけがありました。
C2 noun /daɪˈvɛstɪtʃər/

divestiture

事業売却
Meaning
the action of selling off or disposing of business interests or assets
Example
The divestiture of the subsidiary was completed last year.
子会社の事業売却は昨年完了しました。
C1 verb /ˌdɪsəˈlaʊ/

disallow

許可しない
Meaning
to refuse to allow or accept something
Example
The referee disallowed the goal for offside.
審判はオフサイドのためゴールを認めませんでした。
C2 verb /dɪˈdʒɛkt/

deject

落胆させる
Meaning
to make someone feel sad, depressed, or dispirited
Example
The news of his failure seemed to deject him deeply.
彼の失敗のニュースは彼を深く落胆させたようだ。
B1 adjective ˈsteɪbl

stable

安定した
Meaning
Not likely to change or fail; firmly established.
Example
Strong nuclear force keeps the nucleus stable.
強い核力は原子核を安定させる。
B1 verb /ˈkɒnsəntreɪt/

concentrate

集中する
Meaning
to focus all one's attention or mental effort on a particular object or activity
Example
She tried to concentrate on her studies despite the noise.
騒音にもかかわらず、彼女は勉強に集中しようとした。
A1 noun /ˈiːv.nɪŋ/

evening

夕方
Meaning
the part of the day between afternoon and night
Example
We went for a walk in the cool evening.
私たちは涼しい夕方に散歩に行きました。
C1 adjective /dræb/

drab

地味な
Meaning
Dull, lacking brightness or interest; monotonous.
Example
The room looked drab with its gray walls and dim lighting.
灰色の壁と薄暗い照明でその部屋は地味に見えた。
C2 noun /ˈrɪp.lɪt/

ripplet

小さな波
Meaning
a small or tiny ripple
Example
Tiny ripplets appeared on the lake as the fish moved.
魚が動くと湖に小さな波が現れました。
C1 noun /ˈrɪpəl/

Ripple

波紋
Meaning
a small wave on the surface of water; a spreading effect or influence
Example
The stone created ripples across the calm pond.
石が静かな池に波紋を作った。
B2 verb /dɪˈtekt/

detect

検出する
Meaning
to discover or identify the presence or existence of something; to notice something that is not immediately obvious
Example
The security system can detect movement in the building.
セキュリティシステムは建物内の動きを検出できます。
B2 noun /ˈpæʃ.ən/

Passion

情熱
Meaning
strong enthusiasm or excitement for something; intense emotion or feeling
Example
Her passion for music led her to become a professional singer.
音楽への情熱が彼女をプロの歌手に導いた。
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 noun /kənˈsaɪnər/

consignor

発送者
Meaning
a person or company that sends goods to be sold or transported
Example
The consignor shipped the goods to the warehouse.
発送者は商品を倉庫に送った。
C2 noun /daɪˈɡrɛʃən/

digression

逸脱
Meaning
A temporary departure from the main subject in speech or writing.
Example
Her story was full of interesting digressions.
彼女の話は面白い逸脱で満ちていました。
A2 noun /vəˈkæbjʊləri/

vocabulary

語彙
Meaning
the set of words known and used by a person, group, or language; the words used in a particular field or subject
Example
Reading every day helps improve your vocabulary.
毎日読むことは語彙力を高めます。
A1 conjunction /ðæn/

than

より
Meaning
used to introduce the second element in a comparison
Example
She is taller than her brother.
彼女は彼女の兄よりも背が高い。
C1 noun /ˈpɛndənt/

pendant

ペンダント
Meaning
a piece of jewelry that hangs from a chain worn around the neck
Example
She wore a silver pendant around her neck.
彼女は首に銀のペンダントをつけていました。
C2 noun /ˈmɛtəfɔːrm/

metaphorm

隠喩の形
Meaning
A coined or rare term sometimes used to describe a hybrid form of metaphor and form in literature or art.
Example
The poet introduced a metaphorm to blend imagery with structure.
詩人はイメージと構造を結びつけるためにメタフォームを導入しました。
C2 noun /ˌɔːrəˈtɔːri.oʊ/

oratorio

宗教音楽作品
Meaning
A large-scale musical composition for orchestra, choir, and soloists, usually on a sacred theme, performed without costumes or scenery.
Example
Handel's 'Messiah' is one of the most famous oratorios ever written.
ヘンデルの『メサイア』は最も有名なオラトリオの1つです。
A1 noun /ˈmɔːrnɪŋ/

morning

幸福
Meaning
the early part of the day, typically from sunrise until noon
Example
I like to go for a run in the morning.
彼女は賞を受け取ったとき、自分の幸福を隠すことができませんでした。
B1 noun /ˈsʌn.raɪz/

Sunrise

日の出
Meaning
the time in the morning when the sun appears above the horizon
Example
We watched the beautiful sunrise from the mountain top.
私たちは山頂から美しい日の出を見ました。
A2 verb /riːtʃ/

reach

到達する
Meaning
to arrive at a destination; to extend one's arm to touch something
Example
We will reach the station in ten minutes.
私たちは10分以内に駅に到着します。
B1 adjective /ˈsɪvəl/

civil

市民の
Meaning
Relating to ordinary citizens and their concerns, or being polite and courteous.
Example
They settled the matter through civil discussion.
彼らは市民的な議論を通じて問題を解決しました。
C2 noun /ˌsɪləbɪˈkeɪʃən/

syllabication

音節分け
Meaning
The division of words into syllables.
Example
Proper syllabication helps in correct pronunciation.
適切な音節分けは正しい発音に役立ちます。
C1 noun /ˈʌndərˌstʌdi/

understudy

アンダースタディ
Meaning
An actor who learns another's role to act as a replacement if needed.
Example
The understudy performed when the lead actor fell ill.
主役の俳優が病気になったとき、アンダースタディが演じました。
C1 noun ˈkɒnfluəns

confluence

合流
Meaning
An act or process of merging.
Example
The confluence of ideas from different cultures created a rich discussion.
異なる文化からのアイデアの合流は、豊かな議論を生み出しました。
A1 noun /tə'meɪ.toʊ/

Tomato

トマト
Meaning
a red or yellow edible fruit that is typically eaten as a vegetable
Example
She added fresh tomatoes to the salad.
彼女はサラダに新鮮なトマトを加えました。
B2 noun /fɪˈlɒs.ə.fi/

philosophy

哲学
Meaning
the study of the fundamental nature of knowledge, reality, and existence
Example
Her philosophy emphasizes kindness and empathy.
彼女の哲学は親切さと共感を強調しています。
B1 verb /əˈsɪst/

assist

助ける
Meaning
to help or support someone in doing something
Example
The nurse will assist the doctor during the surgery.
看護師は手術中に医者をアシストします。
C1 verb, noun /mɛʃ/

mesh

メッシュ, 絡ませる
Meaning
To fit or work together properly; or a material made of interlaced threads.
Example
The two gears mesh perfectly to keep the machine running smoothly.
二つの歯車が完璧に噛み合って、機械がスムーズに動く。
C1 noun /mɔːrˈfɑːlədʒi/

morphology

形態学
Meaning
the study of the form and structure of things, especially in language and biology
Example
Morphology studies the structure of words and how they are formed.
形態学は、単語の構造とその形成方法を研究します。
A1 verb /pʊt/

put

置く
Meaning
to place something in a particular position; to move to a location
Example
Please put the book on the table.
本をテーブルに置いてください。
B2 noun ɪnˈhɑːns.mənt

enhancement

向上
Meaning
An increase or improvement in quality, value, or extent.
Example
Enhancement of education quality is vital.
教育の質の向上は非常に重要です。
C1 adjective /ˈtɪp.tɒp/

Tiptop

最高の; 完璧な状態
Meaning
of the highest quality; excellent; in perfect condition
Example
The car is in tiptop condition.
車は最高の状態です。
B2 verb /kənˈtɛnd/

contend

争う、主張する
Meaning
to strive or compete for something; to assert earnestly
Example
Athletes from around the world contend for the championship.
世界中のアスリートがチャンピオンシップを争っています。
C2 noun /ˈɡæliən/

galleon

ガレオン船
Meaning
A large sailing ship used mainly by Europeans from the 16th to 18th centuries.
Example
The Spanish galleon carried treasures across the Atlantic.
スペインのガレオン船は大西洋を越えて財宝を運んだ。
C2 adjective /læŋk/

lank

高くて細い
Meaning
Tall, thin, and often awkward in appearance.
Example
The lank teenager towered over his classmates.
その高くて細いティーンエイジャーはクラスメートよりも高かった。
C1 adjective /aʊtˈmoʊdɪd/

outmoded

時代遅れ
Meaning
No longer in fashion or useful; outdated.
Example
That old computer is completely outmoded.
その古いコンピューターは完全に時代遅れです。
C1 adjective /ɪɡˈzæspəˌreɪtɪd/

exasperated

非常にいらいらした
Meaning
greatly annoyed or irritated
Example
She gave him an exasperated look after his repeated mistakes.
彼女は繰り返しのミスの後、彼に非常にいらいらした視線を送った。
C1 noun /ˈæpəθi/

apathy

無関心
Meaning
a lack of interest, enthusiasm, or concern
Example
The students showed apathy towards the new rules.
学生たちは新しいルールに無関心を示しました。
C1 noun /ˈfreɪlti/

frailty

脆弱
Meaning
The condition of being weak, delicate, or easily broken.
Example
Old age often comes with physical frailty.
老化はしばしば身体的な脆弱さと共に訪れます。
C2 adjective /əˌnækrəˈnɪstɪk/

anachronistic

時代錯誤の
Meaning
belonging to a period other than that being portrayed; old-fashioned or outdated
Example
His views on gender roles are considered anachronistic.
彼の性別役割に関する見解は時代遅れと見なされている。
A2 noun, verb /tʃɪp/

chip

Meaning
A small piece broken off from something; or to cut or break a small piece from something.
Example
He accidentally chipped the edge of the table.
B2 noun /ˌɑb.zɚˈveɪ.ʃən/

Observation

観察
Meaning
the action of watching something carefully; a comment or remark
Example
The scientist made careful observations of the experiment.
科学者は実験を慎重に観察しました。
C2 noun /ˈdeɪ.ɪs/

Dais

演壇
Meaning
a raised platform, typically at one end of a room or hall, for speakers or honored guests
Example
The principal stood on the dais to address the entire school assembly.
校長は演壇に立ち、全校集会に話しかけました。
C1 adjective /rɪˈsɔːrs ɪˈfɪʃ.ənt/

resource-efficient

資源効率的
Meaning
Using resources in a way that minimizes waste and maximizes productivity.
Example
Resource-efficient farming conserves water and energy.
資源効率的な農業は、水とエネルギーを節約します。
B2 noun ˈbænd.wɪdθ

bandwidth

帯域幅
Meaning
A range of frequencies within a given band, in particular that used for transmitting a signal; the maximum amount of data that can be transmitted in a fixed amount of time.
Example
Increasing bandwidth enhances internet speed.
帯域幅を増やすとインターネットの速度が向上します。
C1 noun ˌes.kəˈleɪ.ʃən

escalation

急激な増加; 上昇。
Meaning
A rapid increase; a rise.
Example
The escalation of production costs impacts profitability.
生産コストの増加は収益性に影響を与えます。
B1 noun /ˈbaɪər/

buyer

買い手
Meaning
a person who makes a purchase
Example
The buyer inspected the car before making payment.
買い手は支払い前に車を検査しました。
C2 noun/verb /ɡraʊs/

grouse

不平を言う / 鳥の一種
Meaning
A type of bird; or to complain or grumble persistently.
Example
He always grouses about the long hours at work.
彼はいつも長時間働くことに不平を言います。
C1 verb /koʊˈhæbɪt/

cohabit

同棲する
Meaning
To live together, often as partners without being married.
Example
They decided to cohabit before getting married.
彼らは結婚前に同居することを決めました。
C1 noun /ˈstætʃuːt/

statute

法律
Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
新しい法律は労働者の権利を保護します。
B1 noun ˌhjuː.mən ˈraɪts

human rights

人権
Meaning
A right that is believed to belong justifiably to every person.
Example
Human rights protect individual freedoms.
人権は個人の自由を守ります。
C2 noun /pəˈlæv.ər/

palaver

無駄な議論 / 騒動
Meaning
prolonged and idle discussion; fuss or unnecessary talk
Example
After much palaver, they finally agreed on the plan.
長時間無駄な議論の後、彼らは最終的に計画に同意しました。
B1 noun /ˈkætəɡɔːri/

category

カテゴリー
Meaning
a class or division of things regarded as having particular shared characteristics
Example
Books are arranged by category in the library.
本は図書館でカテゴリーごとに整理されています。
C1 adjective /ˈprɒdɪɡəl/

prodigal

浪費家
Meaning
spending money or resources freely and recklessly; wastefully extravagant
Example
The prodigal son returned home after wasting his inheritance.
浪費家の息子は、遺産を浪費した後、家に帰りました。
C2 noun /haɪˈdrɒl.ɪ.sɪs/

hydrolysis

加水分解
Meaning
A chemical process that breaks down compounds by adding water, splitting complex molecules into simpler forms.
Example
Hydrolysis breaks down complex molecules into simpler forms.
加水分解は複雑な分子をより単純な形に分解します。
A2 adjective /ˈrɪtən/

written

書かれた
Meaning
expressed in writing rather than spoken; composed or recorded in written form
Example
The agreement must be in written form to be valid.
その契約は有効であるために書面でなければならない。
B2 noun /kəˈtæstrəfi/

catastrophe

災害
Meaning
A sudden and widespread disaster or misfortune.
Example
The earthquake was a catastrophe for the entire region.
地震は地域全体にとって災害でした。
C2 verb /əˈkɒst/

accost

強引に話しかける
Meaning
to approach and speak to someone boldly or aggressively
Example
The reporter was accosted by protesters outside the courthouse.
報道陣は裁判所の外で抗議者にアコストされた。