diva
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C1 noun /ˈdiːvə/

diva

有名な女性歌手
Meaning
a famous female singer; a woman who is admired or behaves like a star
Example
The pop diva performed her latest hit to a cheering crowd.
ポップディーバは観衆の前で最新のヒットを披露しました。
C1 verb/adjective /dɪˈdʒɛnəreɪt/

degenerate

堕落する
Meaning
To decline or deteriorate in quality, character, or condition; or someone with low moral standards.
Example
The once thriving empire began to degenerate into chaos.
かつて繁栄していた帝国は混沌に堕ち始めました。
C1 verb /ˈdɛprɪˌkeɪt/

deprecate

非難する
Meaning
to express disapproval of something
Example
The teacher deprecated the use of slang in academic essays.
教師は学術論文でのスラングの使用を非難しました。
C1 noun /ˈdɪsənˌtɛri/

dysentery

腸の病気（血液と粘液を伴う下痢）
Meaning
An infection of the intestines resulting in severe diarrhea with blood and mucus.
Example
Many soldiers suffered from dysentery during the war.
多くの兵士たちは戦争中にディスエントリーに苦しんだ。
C1 adjective /dɪsˈhɑːrtənd/

Disheartened

落胆した
Meaning
discouraged; feeling dejected; losing hope or confidence
Example
She felt disheartened after failing the exam twice.
彼女は試験に2回失敗した後、落胆していました。
C1 verb /daɪˈleɪt/

dilate

拡大する
Meaning
To make wider, larger, or more open.
Example
The doctor used drops to dilate the patient's pupils.
医者は患者の瞳孔を拡げるために点眼薬を使いました。
C1 noun /daɪˈsɛkʃən/

dissection

解剖
Meaning
the act of cutting apart or analyzing something in detail, especially a body or structure
Example
The dissection of the specimen revealed important details about its structure.
標本の解剖はその構造に関する重要な詳細を明らかにした。
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。
C1 noun ˌdjʊə.rəˈbɪl.ə.ti

durability

耐久性
Meaning
The ability to withstand wear, pressure, or damage; hard-wearing.
Example
The durability of materials affects performance.
素材の耐久性はパフォーマンスに影響を与えます。
C1 adjective /dɪˈmɪnjətɪv/

diminutive

非常に小さい
Meaning
extremely or unusually small
Example
Despite his diminutive size, he was a powerful leader.
その非常に小さい体格にもかかわらず、彼は強力なリーダーだった。
C1 adjective /dɪˈvɔɪd/

devoid

空虚
Meaning
Completely lacking or without something.
Example
His speech was devoid of any real emotion.
彼のスピーチは実際の感情が空虚だった。
C1 verb /diːˈhaɪdreɪt/

dehydrate

Meaning
to remove water from something; to lose water or body fluids
Example
Running in the heat can quickly dehydrate you.
C1 verb /diːˈfjuːz/

defuse

Meaning
To make a situation less dangerous, tense, or explosive; to remove a fuse from a bomb.
Example
The negotiator helped defuse the tense situation.
C1 verb /dɪsˈtrʌst/

distrust

不信
Meaning
to have no confidence or trust in someone or something
Example
Many people distrust politicians.
多くの人々は政治家を信用しません。
C1 noun dɪˈspær.ə.ti

disparity

格差
Meaning
A great difference or inequality.
Example
Disparity between countries must be reduced.
国々の間の格差は減少するべきです。
C1 adjective /dɪˈfaɪənt/

Defiant

反抗的な; 逆らう
Meaning
boldly resistant or challenging; disobedient
Example
The defiant student refused to follow the rules.
その反抗的な学生はルールに従うことを拒否しました。
C1 noun /diːˌtɒksɪfɪˈkeɪʃən/

detoxification

デトックス
Meaning
The process of removing toxic substances from a living organism.
Example
Detoxification helps to cleanse the body of harmful substances.
デトックスは体内の有害物質を排除するのに役立ちます。
C1 noun /ˌdɪsəˈbiːdiəns/

disobedience

不従順
Meaning
failure or refusal to obey rules, laws, or authority
Example
The child's disobedience worried his parents.
子供の不従順は両親を心配させました。
C1 adjective /dɪˈvaʊt/

devout

献身的
Meaning
Deeply religious or sincere.
Example
He is a devout believer who prays every day.
彼は毎日祈る献身的な信者です。
C1 verb /dɪˈtɛst/

detest

嫌う
Meaning
To dislike intensely or hate.
Example
I detest waking up early on weekends.
私は週末に早起きするのが嫌いです。
C1 verb /dɪˈfeɪs/

deface

傷つける
Meaning
to spoil the surface or appearance of something, especially by writing or drawing on it
Example
The vandals defaced the wall with graffiti.
ヴァンダルたちはグラフィティで壁を傷つけました。
C1 adjective /dɪˈfʌŋkt/

defunct

営業停止、廃止
Meaning
No longer existing, operating, or functioning.
Example
The company became defunct after the financial crisis.
その会社は金融危機の後で廃業しました。
C1 noun /daɪˈvɜː.dʒəns/

divergence

分岐
Meaning
The process or state of diverging; a difference or deviation between two or more things.
Example
The divergence in their opinions led to a heated debate.
彼らの意見の相違は激しい議論を引き起こしました。
C1 noun /ˈdel.ɪ.kə.si/

Delicacy

繊細さ; 高級な料理;
Meaning
fineness of texture or structure; a choice or expensive food; sensitivity in handling
Example
The chef prepared a local delicacy that was famous throughout the region.
シェフは地域全体で有名な地元のデリカシーを準備しました。
C1 verb /drɛntʃ/

drench

びしょ濡れにする
Meaning
to make someone or something completely wet
Example
The sudden rain drenched the players on the field.
突然の雨がフィールドの選手たちをびしょ濡れにした。
C1 adjective /drəˈkoʊniən/

draconian

ドラコニアン
Meaning
Extremely harsh and severe, especially laws or rules.
Example
The new regulations were criticized as draconian.
新しい規制はドラコニアンだと批判されました。
C1 adjective /dɪˈsɜːrnɪŋ/

discerning

鋭い
Meaning
having good judgment or insight; able to distinguish well
Example
He is a discerning reader who notices subtle details.
彼は鋭い読者で、微細な詳細に気づきます。
C1 noun ˌdɪm.ɪˈnjuː.ʃən

diminution

減少
Meaning
A reduction in the size, extent, or importance of something; decrease.
Example
There has been a diminution in air pollution.
大気汚染の減少がありました。
C1 noun /ˈdæɡ.ər/

Dagger

短剣
Meaning
a short knife with a pointed blade used as a weapon
Example
The ancient warrior carried a silver dagger.
古代の戦士は銀の短剣を携えていた。
C1 adjective /dɪˈlæpɪˌdeɪtɪd/

dilapidated

老朽化した
Meaning
Fallen into disrepair or ruin due to neglect or age.
Example
The family lived in a dilapidated house at the edge of town.
その家族は町の端にある老朽化した家に住んでいました。
C1 adjective /ˈdɪs.ə.plɪ.ner.i/

Disciplinary

懲戒的
Meaning
relating to discipline; intended to correct behavior
Example
The company took disciplinary action against the employee.
会社は従業員に対して懲戒措置を取りました。
C1 adjective /ˈdraʊ.zi/

Drowsy

眠い; 疲れた; 無気力な
Meaning
feeling sleepy and lethargic; half asleep; tired
Example
I felt drowsy after the heavy meal.
重い食事の後、眠気を感じました。
C1 noun /deɪˈbɑː.kəl/

debacle

失敗
Meaning
A sudden and ignominious failure; a fiasco.
Example
The company's poor management led to a financial debacle.
会社の不十分な管理が財務的な失敗を招いた。
C1 noun /ˌdɜːrməˈtɑːlədʒi/

dermatology

皮膚科学
Meaning
The branch of medicine concerned with the skin and its diseases.
Example
He studied dermatology at medical school.
彼は医学部で皮膚科学を学んだ。
C1 adverb /ˈduːli/

Duly

適切に, 時間通りに
Meaning
in accordance with what is required or appropriate; at the proper time
Example
The documents were duly signed and submitted.
書類は適切に署名され、提出されました。
C1 noun/verb /ˈdiːkɔɪ/

decoy

おとり
Meaning
something or someone used to lure or mislead
Example
The hunters used a wooden duck as a decoy.
狩人たちは木製のカモをデコイとして使った。
C1 adjective ˈdɔːn.tɪŋ

daunting

威圧的または挑戦的な
Meaning
Something that seems intimidating or challenging.
Example
The task seemed daunting, but she completed it successfully.
その仕事は威圧的に見えたが、彼女はそれを成功裏に終わらせた。
C1 noun /dɪˈrɪʒən/

derision

嘲笑
Meaning
Contemptuous ridicule or mockery.
Example
His ideas were greeted with derision by the audience.
彼のアイデアは観客によって嘲笑された。
C1 noun /dɪˈten.ʃən/

Detention

停学; 拘留
Meaning
the action of detaining someone or being detained in official custody
Example
The student received detention for repeatedly disrupting the class.
生徒は繰り返しクラスを乱したため、停学を受けました。
C1 noun /dɪˈvaɪzər/

divisor

除数
Meaning
A number by which another number is divided.
Example
In the equation 12 ÷ 3, the number 3 is the divisor.
方程式12 ÷ 3では、数字3が除数です。
C1 adjective /dɪsˈkwaɪətɪŋ/

disquieting

不安を引き起こす
Meaning
Causing worry, unease, or anxiety.
Example
The news report was deeply disquieting to the public.
そのニュース報告は公衆にとって非常に不安を引き起こすものでした。
C1 verb, noun /ˌdɪsɪˈluːʒən/

disillusion

幻滅
Meaning
to cause someone to realize that something is not as good as they believed
Example
The scandal disillusioned many voters.
そのスキャンダルは多くの有権者を幻滅させた。
C1 verb /daɪˈluːt/

dilute

薄める
Meaning
To make a liquid thinner or weaker by adding water or another solvent.
Example
You should dilute the juice with water before serving it to children.
子供たちに出す前にジュースを水で薄めるべきです。
C1 verb /dɪˈspɛns/

dispense

配布する
Meaning
To distribute or provide something, especially in portions.
Example
The machine dispenses clean drinking water.
その機械は清潔な飲料水を供給します。
C1 adjective /ˈdesələt/

Desolate

荒涼; 孤独; 不毛
Meaning
deserted; lonely; barren
Example
The abandoned village looked desolate and empty.
放棄された村は荒涼として空っぽに見えた。
C1 noun /ˌdiː.viˈeɪ.ʃən/

Deviation

逸脱；定められたコースから外れること
Meaning
the action of departing from an established course; a departure from usual standards
Example
Any deviation from the established procedure must be reported immediately.
定められた手順からの逸脱は直ちに報告されなければなりません。
C1 adjective /dɪˈsiːtfəl/

deceitful

欺瞞的な
Meaning
Deliberately misleading or dishonest.
Example
She gave a deceitful answer to hide the truth.
彼女は真実を隠すために欺瞞的な答えを出しました。
C1 noun, adjective /dɪˈrɪvətɪv/

derivative

派生物
Meaning
Something that is based on another source; in math, a measure of how a function changes.
Example
The film was criticized for being too derivative of earlier works.
その映画は、前の作品を模倣しすぎて批判されました。
C1 verb /dɪˈsɛləˌreɪt/

decelerate

減速する
Meaning
to reduce speed; to slow down
Example
The car began to decelerate as it approached the traffic light.
車は信号に近づくと減速し始めました。
C1 noun dɪˌtɪə.ri.əˈreɪ.ʃən

deterioration

劣化
Meaning
The process of becoming progressively worse; decline in quality, condition, or strength.
Example
Poor maintenance leads to material deterioration.
不十分なメンテナンスは材料の劣化を引き起こす。
C1 adjective /ˈdek.stər.əs/

dexterous

器用
Meaning
Showing or having skill, especially with the hands; mentally adroit and skillful.
Example
A dexterous programmer can write complex codes effortlessly.
器用なプログラマーは複雑なコードを楽々と書けます。
C1 verb /dɪˈsɛm.ɪ.neɪt/

disseminate

普及する
Meaning
To spread or give out something, especially news, information, ideas, etc., to a lot of people.
Example
Social media helps to disseminate information quickly.
ソーシャルメディアは情報を迅速に普及するのに役立ちます。
C1 noun /ˈdɛspɒt/

despot

暴君
Meaning
a ruler with absolute power, often ruling in a cruel or oppressive way
Example
The despot ruled the nation with fear and violence.
暴君は恐怖と暴力で国を支配した。
C1 verb /daɪˈɡrɛs/

digress

Meaning
To leave the main subject temporarily in speech or writing.
Example
The professor began to digress from the main topic of the lecture.
C1 noun /deɪˈtɒnt/

detente

緊張関係の緩和
Meaning
the easing of strained relations, especially between countries
Example
The treaty helped bring about a détente between the two nations.
その条約は、二国間の緊張関係を緩和するのに役立ちました。
C1 adjective /ˈdaʊ.ər/

dour

厳格
Meaning
relentlessly severe, stern, or gloomy in manner or appearance
Example
His dour expression made the meeting uncomfortable.
彼の厳格な表情は会議を不快にした。
C1 adjective /daɪˈvɜːrsɪfaɪd/

diversified

多様化された
Meaning
Made or having variety in form, nature, or content.
Example
The company adopted a diversified business strategy to reduce risks.
その会社はリスクを減らすために多様化されたビジネス戦略を採用した。
C1 verb /dɪˈspɜːrs/

disperse

解散する
Meaning
To scatter or spread widely in different directions.
Example
The police used tear gas to disperse the crowd.
警察は群衆を解散させるために催涙ガスを使用しました。
C1 adjective ˌdet.rɪˈmen.təl

detrimental

有害な
Meaning
Tending to cause harm; damaging or harmful.
Example
Pollution has detrimental effects on fertility.
汚染は生殖能力に有害な影響を与えます。
C1 adjective dɒɡˈmæt.ɪk

dogmatic

教条的
Meaning
Being inclined to lay down principles as incontrovertibly true; characterized by arrogant assertion of unproven principles.
Example
His dogmatic approach to politics made discussions difficult.
彼の教条的なアプローチは、議論を難しくしました。
C1 adjective /dɪˈmɒnstrətɪv/

demonstrative

表現的な
Meaning
openly showing feelings, especially affection or emotion
Example
She was very demonstrative with her affection towards her friends.
彼女は友達に対してとても表現的だった。
C1 noun /ˌdɪspɛnˈseɪʃən/

dispensation

Meaning
An exemption from a rule or usual requirement; a system of order, government, or control.
Example
The school granted him a special dispensation to skip the exam due to illness.
C1 verb /diːˈkoʊd/

decode

Meaning
to convert a coded message into a readable form; to interpret meaning
Example
The software can decode the hidden message within seconds.
C1 adjective /dɪsˈrɛpjətəbl̩/

disreputable

不名誉な
Meaning
having a bad reputation; not considered respectable or trustworthy
Example
The journalist avoided staying in the disreputable part of town.
ジャーナリストは町の不名誉な地区に泊まるのを避けました。
C1 verb dɪˈlɪnieɪt

delineate

詳細に描写する
Meaning
To describe or portray something precisely
Example
The artist delineated the scene in intricate detail.
アーティストはシーンを複雑な詳細で描写しました。
C1 noun /dɪˈsiːt/

Deceit

欺瞞; 詐欺; 嘘
Meaning
the action or practice of deceiving someone by concealing or misrepresenting the truth
Example
His deceit was discovered when the truth about his qualifications came to light.
彼の欺瞞は、彼の資格についての真実が明らかになったときに発覚しました。
C1 verb /ˌdiːˈbʌŋk/

debunk

虚偽を暴露する、神話を打破する
Meaning
Expose the falseness or hollowness of (a myth, idea, or belief).
Example
Scientists debunked the myth that vaccines cause autism.
科学者たちは、ワクチンが自閉症を引き起こすという神話を打破した。
C1 verb /deɪz/

daze

Meaning
to stun or confuse someone temporarily with a shock or surprise
Example
The bright lights dazed the runners as they entered the stadium.
C1 noun /ˌdiː.mɑːˈkeɪ.ʃən/

Demarcation

境界設定
Meaning
the action of fixing the boundary or limits of something; separation or division
Example
The demarcation between public and private land was clearly marked.
公共の土地と私有地の境界設定は明確に示されていた。
C1 noun ˌdɛməˈɡræfɪk trænˈzɪʃən

demographic transition

人口転換
Meaning
A shift in population patterns from high birth and death rates to low birth and death rates as a country develops economically
Example
The demographic transition indicates a shift towards an aging society.
人口転換は高齢化社会への移行を示しています。
C1 noun /ˈdjuːplɛks/

duplex

デュプレックスハウス
Meaning
A house or apartment divided into two separate residences.
Example
They live in a duplex near the city center.
彼らは市の中心近くのデュプレックスに住んでいます。
C1 adjective /ˈdjuːbiəs/

dubious

疑わしい
Meaning
Hesitating or doubting; not to be relied upon.
Example
She gave him a dubious look after hearing his excuse.
彼女は彼の言い訳を聞いた後、疑わしい目で彼を見ました。
C1 noun ˌdiːˌrɛɡ.jʊˈleɪ.ʃən

deregulation

規制緩和
Meaning
The removal or reduction of government regulations in an economic sector.
Example
Deregulation has increased competition in the telecommunications sector.
規制緩和は通信業界で競争を促進しました。
C1 noun /ˈdɪɡnɪˌtɛri/

dignitary

重要人物
Meaning
a person considered to be important because of high rank or office
Example
Several foreign dignitaries attended the state banquet.
数人の外国の重要人物が国の晩餐会に出席しました。
C1 adjective /dɪˈmɛntɪd/

demented

狂った / 非理性的
Meaning
behaving irrationally due to mental illness or extreme excitement
Example
He looked demented after hearing the shocking news.
彼は衝撃的なニュースを聞いた後、正気を失ったように見えました。
C1 verb /ˈdaʊn.pleɪ/

downplay

軽視する
Meaning
to make something seem less important than it really is
Example
The company tried to downplay the risks of the new product.
会社は新しい製品のリスクを軽視しようとしました。
C1 verb /ˈdɛnɪˌɡreɪt/

denigrate

貶める
Meaning
to criticize unfairly; to belittle or disparage someone or something
Example
He was quick to denigrate the achievements of his colleagues.
彼は同僚の業績をすぐに貶めました。
C1 verb /ˌdɪskənˈsɜːrt/

disconcert

動揺させる
Meaning
To unsettle, confuse, or disturb the composure of someone.
Example
The sudden change of plans disconcerted the team.
突然の計画変更がチームを混乱させた。
C1 noun/adjective /dɪˈtɜː.rənt/

deterrent

抑止力
Meaning
A thing that discourages or is intended to discourage someone from doing something.
Example
A strict law serves as a deterrent to crime.
厳格な法律は犯罪の抑止力として機能します。
C1 noun /ˌdez.ɪɡˈneɪ.ʃən/

Designation

任命; 役職; 職位; ステータス
Meaning
the action of choosing someone for a position; a name, title, or official status
Example
His designation as team leader came with additional responsibilities and authority.
チームリーダーとしての彼の任命は、追加の責任と権限を伴っていました。
C1 noun /ˈdek.ə.dəns/

decadence

堕落
Meaning
Moral or cultural decline characterized by excessive indulgence in pleasure or luxury.
Example
The novel describes the decadence of the wealthy elite.
その小説は裕福なエリートの堕落を描いています。
C1 verb /ˈdæmpən/

dampen

湿らせる, 和らげる
Meaning
to make something slightly wet; to make something less strong, active, or intense
Example
The rain dampened the excitement of the outdoor concert.
雨が屋外コンサートの興奮を和らげました。
C1 adjective /ˈdwɪndlɪŋ/

dwindling

減少
Meaning
Gradually reducing in number, size, or strength.
Example
The villagers relied on dwindling water supplies.
村人たちは減少していく水の供給に依存していた。
C1 noun dɪˌzɝː.t̬ə.fɪˈkeɪ.ʃən

desertification

砂漠化
Meaning
The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
Example
Deforestation accelerates desertification.
森林伐採は砂漠化を加速させます。
C1 noun /dɪˈluːʒən/

delusion

錯覚
Meaning
A false belief or impression maintained despite being contradicted by reality.
Example
He lived under the delusion that he was invincible.
彼は自分が無敵だという錯覚の中で生きていた。
C1 verb /dɪsˈpleɪs/

displace

置き換える
Meaning
to force someone or something out of their usual or original position; to replace or substitute
Example
The new technology will displace many traditional manufacturing jobs.
新しい技術は多くの伝統的な製造業の仕事を置き換えるでしょう。
C1 noun /drɑːft/ (UK), /dræft/ (US)

draught

Meaning
a current of cool air in a room or another confined space; also a portion of liquid, especially beer, served from a barrel or cask
Example
She closed the window to keep out the cold draught.
C1 verb /dəˈmɛstɪkeɪt/

domesticate

家畜化する
Meaning
to tame an animal for use by humans; to adapt something for domestic use
Example
Humans domesticated dogs thousands of years ago.
人間は数千年前に犬を家畜化しました。
C1 verb /ˌdiː.kəmˈprɛs/

decompress

リラックスする
Meaning
To relax and recover from stress or pressure.
Example
Taking deep breaths helps to decompress after a stressful day.
深呼吸は、ストレスの多い一日後にリラックスするのに役立ちます。
C1 verb /dɪˈraɪd/

deride

嘲笑する
Meaning
to mock or ridicule someone or something
Example
The critics derided the new movie for its poor script.
批評家たちはその新しい映画を悪い脚本のせいで嘲笑した。
C1 verb /daɪˈvɜːrdʒ/

diverge

分岐する
Meaning
to separate and go in different directions; to differ
Example
The two paths diverge at the fork in the road.
二つの道は交差点で分かれる。
C1 verb /dɪˈfrɔːd/

defraud

詐欺
Meaning
to illegally take money or valuables from someone by deception
Example
The company was accused of trying to defraud investors.
その会社は投資家をだまそうとしたとして告発されました。
C1 verb /dɛlv/

delve

Meaning
To investigate deeply; to dig into a subject or area.
Example
The researcher delved into ancient manuscripts to find clues.
C1 adjective /ˈdɑːsəl/ or /ˈdəʊsaɪl/

docile

従順な
Meaning
easily managed, taught, or controlled; submissive
Example
The docile puppy quickly learned new tricks.
従順な子犬はすぐに新しい技を覚えました。
C1 adjective /dɪˈspɒndənt/

despondent

Meaning
feeling or showing deep hopelessness or discouragement
Example
She felt despondent after losing her job.
C1 verb /dɪˈfeɪm/

defame

名誉毀損
Meaning
to harm someone's reputation by spreading false information
Example
He was defamed by malicious rumors.
彼は悪意のある噂で中傷されました。
C1 verb /dɪˈpliːt/

deplete

使い果たす
Meaning
to reduce the quantity or supply of something
Example
The long war has depleted the country's resources.
長引く戦争で国の資源は枯渇した。
C1 noun ˌdiː.sen.trə.laɪˈzeɪ.ʃən

decentralization

分権
Meaning
The transfer of authority from central to local government.
Example
Decentralization promotes regional autonomy.
分権は地域の自立を促進します。
C1 noun /draɪ fɪʃ/

Dry fish

干物
Meaning
fish that has been preserved by drying in the sun or by other dehydration methods
Example
Dry fish is a popular preserved food in many coastal regions.
干物は多くの沿岸地域で人気のある保存食です。
C1 verb /ˈdræm.ə.taɪz/

dramatize

ドラマ化する
Meaning
to present a story in a dramatic way, or to exaggerate something
Example
The novel was dramatized into a popular TV series.
その小説は人気のテレビシリーズにドラマタイズされました。
C1 adjective /dɪˈklærətɪv/

declarative

宣言的
Meaning
relating to a statement that declares something; in grammar, a sentence that makes a statement
Example
A declarative sentence simply states a fact or opinion.
宣言的な文は、単に事実や意見を述べるものです。
C1 noun /ˈdɒktrɪn/

doctrine

教義
Meaning
A set of beliefs or principles held and taught by a religious, political, or other group.
Example
The church follows a strict doctrine on moral values.
教会は道徳的価値に関する厳格な教義を遵守しています。
C1 verb /ˈdrɪbəl/

dribble

Meaning
to let liquid flow slowly in drops or to move a ball skillfully with repeated small kicks or bounces
Example
The baby dribbled milk on his shirt.
C1 noun ˌdep.əˈzɪʃ.ən

deposition

堆積、何かを堆積させるプロセス
Meaning
The action of depositing something; the laying down of matter by a natural process.
Example
River deposition leads to the formation of new landmasses.
河川の堆積は新しい大陸の形成をもたらします。
C1 noun /ˌdɛfəˈmeɪʃən/

defamation

名誉毀損
Meaning
the act of damaging someone's reputation by making false statements
Example
The newspaper was sued for defamation of character.
その新聞は名誉毀損で訴えられた。
C1 adjective /ˈdæʃ.ɪŋ/

Dashing

魅力的; スタイリッシュ; 自信に満ちた;
Meaning
stylish and confident; lively and energetic; attractive and charming
Example
He looked dashing in his new suit.
彼は新しいスーツで魅力的に見えました。
C1 noun /ˈdeɪˌbreɪk/

daybreak

夜明け
Meaning
The time in the morning when daylight first appears; dawn.
Example
They set out on their journey at daybreak.
彼らは夜明けに旅を始めました。
C1 noun /djuːn/

dune

砂丘
Meaning
A hill or ridge of sand formed by the wind, usually found in deserts or near beaches.
Example
The children played on the sand dune by the beach.
子供たちはビーチの砂丘で遊んでいました。
C1 noun /ˈdɪsɪdənt/

dissident

反体制派
Meaning
A person who opposes official policy, especially that of an authoritarian state.
Example
The dissident was arrested for speaking against the government.
反体制派は政府に対する発言で逮捕された。
C1 noun ˌdɪs.ɪnˈfek.ʃən

disinfection

消毒
Meaning
The process of destroying harmful microorganisms to prevent infection.
Example
Kitchen appliances require frequent disinfection.
キッチン用具は頻繁に消毒する必要があります。
C1 noun /ˈdrɛsˌmeɪkər/

dressmaker

洋裁師
Meaning
A person who makes or alters women's clothing professionally.
Example
The dressmaker crafted a beautiful gown for the bride.
洋裁師は花嫁のために美しいドレスを作った。
C1 verb /dɪˈdjuːs/

deduce

推測する
Meaning
to reach a conclusion by reasoning or inference
Example
From the evidence, the detective deduced that the suspect was lying.
証拠から、探偵は容疑者が嘘をついていることを推測しました。
C1 noun dɪˈskrep.ən.siz

discrepancies

不一致
Meaning
Differences between things that should be the same
Example
Discrepancies in regulations delay progress.
規則の不一致が進行を遅らせている。
C1 verb /dɪˈtrækt/

detract

Meaning
To reduce or take away the worth or value of something.
Example
His rude behavior will detract from his good reputation.
C1 noun /dɪsˈlɛksiə/

dyslexia

ディスレクシア
Meaning
A learning disorder characterized by difficulty reading due to problems identifying speech sounds and decoding words.
Example
The teacher used special methods to help the student with dyslexia.
先生はディスレクシアの学生を助けるために特別な方法を使いました。
C1 verb /dɪˈpoʊz/

depose

Meaning
to remove someone from office or power, especially suddenly and forcefully
Example
The rebels managed to depose the dictator after years of unrest.
C1 noun /ˈderˌdevəl/

daredevil

危険を冒す人
Meaning
A person who enjoys doing dangerous or risky things.
Example
The stunt was performed by a famous daredevil.
そのスタントは有名なデアデビルによって行われました。
C1 noun /dɪˈmiːnər/

demeanour

態度
Meaning
a person's outward behavior or appearance
Example
Her calm demeanour impressed everyone during the meeting.
会議中、彼女の落ち着いた態度は皆に印象を与えました。
C1 noun dɪˈtɜː.mɪ.nənt

determinant

決定的な要素
Meaning
A factor that decisively affects the nature or outcome of something.
Example
Education is a key determinant of success.
教育は成功の重要な決定的要素です。
C1 adjective /ˈdɪn.dʒi/

Dingy

汚れていて暗い; 色が鈍い
Meaning
dark and dirty; gloomy; dull in color
Example
The old building had dingy walls that needed painting.
古い建物は、塗装が必要な汚れた壁を持っていた。
C1 verb /daɪˈvʌldʒ/

divulge

明らかにする
Meaning
to make known something private, secret, or previously unknown
Example
She refused to divulge the source of her information.
彼女は情報の源を明らかにすることを拒否しました。