dispense
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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 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 verb /dɪsˈkleɪm/

disclaim

否定する
Meaning
to deny responsibility or connection with something
Example
The company disclaimed responsibility for the accident.
その会社は事故に対する責任を否定しました。
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, noun /dɪsˈkrɛdɪt/

discredit

信用を失わせる
Meaning
To harm the reputation of someone or something; loss of respect or credibility.
Example
The scandal discredited the politician in the eyes of the public.
スキャンダルは公衆の目で政治家を信用を失わせました。
C1 adjective ˈdɪs.pər.ət

disparate

異なる
Meaning
containing elements very different from one another.
Example
Their opinions were disparate, leading to debates.
彼らの意見は異なり、討論を引き起こしました。
C1 noun /dɪˌsem.ɪˈneɪ.ʃən/

dissemination

拡散
Meaning
The action or fact of spreading something, especially information, widely.
Example
The dissemination of false information is a major issue.
偽の情報の拡散は大きな問題です。
C1 verb /dɪˈstɪl/

distill

Meaning
To purify a liquid by heating and cooling; to extract the essential meaning or most important aspects.
Example
The factory distills water to make it safe for drinking.
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 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 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 verb /dɪsˈɡrʌntl/

disgruntle

不満にさせる
Meaning
to make someone dissatisfied or discontented
Example
The unfair treatment disgruntled the workers.
不公平な扱いが労働者を不満にさせた。
C1 noun ˌdɪs.æmˌbɪɡ.juˈeɪ.ʃən

disambiguation

曖昧さの解消
Meaning
The removal of ambiguity by making something clear and unambiguous.
Example
The AI system applies disambiguation to refine text understanding.
AIシステムはテキスト理解を精緻化するためにディスアンビギュエーションを適用します。
C1 noun /djuːˈɛt/

duet

デュエット
Meaning
a musical performance by two singers or instrumentalists
Example
They sang a beautiful duet together on stage.
彼らはステージで一緒に美しいデュエットを歌った。
C1 verb /dɪsˈmæntəl/

dismantle

解体する
Meaning
to take apart; to remove or destroy the parts of
Example
Workers will dismantle the old bridge next month.
作業員たちは来月古い橋を解体します。
C1 verb /dɪˈnəʊt/

denote

示す
Meaning
To be a sign of; to indicate or mean something.
Example
A red flag denotes danger.
赤い旗は危険を示しています。
C1 verb /dɪˈsɛkt/

dissect

Meaning
to cut apart an animal, plant, or other organism to study its internal parts; to analyze something in detail
Example
In biology class, students had to dissect a frog to learn about its anatomy.
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 noun /ˌdɜːrməˈtɑːlədʒɪst/

dermatologist

皮膚科医
Meaning
A doctor who specializes in the treatment of skin diseases.
Example
She consulted a dermatologist for her skin allergy.
彼女は皮膚のアレルギーのために皮膚科医に相談した。
C1 adjective /dɪˈlɪriəs/

delirious

デリリアス
Meaning
in an extremely disturbed or excited state of mind, often due to illness or emotion
Example
He was delirious with fever and kept muttering nonsense.
彼は熱でデリリアスで、無意味なことを呟いていた。
C1 noun /ˈdɔːrˌkiːpər/

doorkeeper

門番
Meaning
A person whose job is to guard or manage the entrance of a building or room.
Example
The doorkeeper checked everyone’s passes before they entered the hall.
ドアキーパーは皆がホールに入る前に通行証を確認した。
C1 adjective /dɪˈvɪzəbl/

divisible

割り切れる
Meaning
Capable of being divided by another number without leaving a remainder.
Example
Twelve is divisible by three and four.
12は3と4で割り切れます。
C1 verb /dɪˈkraɪ/

decry

非難する
Meaning
to publicly criticize or express strong disapproval of something
Example
Many activists decry the destruction of the rainforest.
多くの活動家が熱帯雨林の破壊を非難しています。
C1 noun /ˈdɑːsieɪ/

dossier

ファイル
Meaning
A collection of documents about a particular person, event, or subject.
Example
The lawyer presented a dossier of evidence to the court.
弁護士は証拠のドシエを裁判所に提出しました。
C1 verb /dɪsˈɑːrm/

disarm

武装解除する
Meaning
to take weapons away from someone; to make someone feel less hostile
Example
The soldiers were ordered to disarm the rebels.
兵士たちは反乱者の武装を解除するよう命じられた。
C1 adjective /dɪsˈɪntrəstɪd/

disinterested

無関心
Meaning
not influenced by personal interest; impartial or neutral
Example
The judge remained disinterested in the case.
裁判官はその事件に無関心のままでした。
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 adjective /dɪˈplɔːrəbl/

deplorable

ひどい
Meaning
deserving strong condemnation; shockingly bad in quality
Example
The refugees were living in deplorable conditions.
難民はひどい状況で生活していた。
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 /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 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 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 /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 /ˌdɪsərˈteɪʃən/

dissertation

論文
Meaning
A long piece of writing on a particular subject, usually written for a university degree.
Example
She spent two years writing her doctoral dissertation.
彼女は博士論文を書くのに2年を費やしました。
C1 noun ˈdaɪ.nə.sti

dynasty

王朝
Meaning
A line of hereditary rulers of a country; a succession of people from the same family who play a prominent role in business, politics, or another field.
Example
The Ming dynasty ruled China for centuries.
明王朝は何世紀にもわたって中国を支配していました。
C1 verb /daʊs/

douse

消す / 注ぐ
Meaning
to pour liquid over; to extinguish a fire or light
Example
Firefighters doused the flames with water.
消防士たちは水で炎を消しました。
C1 adjective /ˌdɪfəˈrɛnʃəl/

differential

差別的
Meaning
Relating to or showing a difference; involving a distinction.
Example
There is a differential treatment between the two groups.
2つのグループ間に差別的な扱いがあります。
C1 verb /ˈdæb.əl/

dabble

軽く取り組む
Meaning
To take part in an activity in a casual or superficial way.
Example
He dabbled in painting during his college days.
彼は大学時代に絵を描くことを楽しんでいた。
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 verb /dɪˈɡreɪd/

degrade

Meaning
To lower in dignity, quality, or value; to treat with disrespect or to deteriorate.
Example
Harsh words can degrade a person's confidence.
C1 noun /ˈdæn.drʌf/

Dandruff

フケ
Meaning
small white or grey flakes of dead skin that form on the scalp and fall from the hair
Example
He used a special shampoo to treat his persistent dandruff problem.
彼は慢性的なフケの問題を治すために、特別なシャンプーを使った。
C1 verb /ˈduːdəl/

doodle

Meaning
To draw or scribble absentmindedly, often while thinking about something else.
Example
She doodled flowers in the corner of her notebook during class.
C1 verb /diːm/

deem

みなす, 判断する
Meaning
to regard or consider in a specified way
Example
The project was deemed a success by the board.
そのプロジェクトは理事会によって成功だと見なされました。
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 /ˈdɛmənˌstreɪtər/

demonstrator

デモンストレーター, 抗議者
Meaning
a person who shows how something works or takes part in a public protest
Example
The demonstrators marched peacefully through the city streets.
デモ参加者は平和的に街の通りを行進しました。
C1 adjective /ˈdɛkədənt/

decadent

堕落的, 贅沢な
Meaning
Characterized by or reflecting a state of moral or cultural decline; excessively self-indulgent.
Example
The party was filled with decadent luxury and excess.
パーティーは堕落的な贅沢と過剰で満たされていました。
C1 noun /ˌdɪsəˈluːʃən/

dissolution

解散
Meaning
the act of formally ending or breaking apart something, such as an organization or marriage
Example
The dissolution of the company was announced yesterday.
会社の解散は昨日発表されました。
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 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 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 noun /ˈdʊr.i.ən/

Durian

ドリアン
Meaning
a large spiky tropical fruit known for its strong smell and creamy custard-like flesh
Example
Durian is known as the king of fruits in Southeast Asia despite its pungent odor.
ドリアンは強い匂いにもかかわらず、東南アジアで果物の王として知られている。
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 noun /ˈdaʊn.pɔːr/

Downpour

豪雨; 急な大雨
Meaning
a heavy fall of rain; a sudden heavy rainfall
Example
The sudden downpour caught everyone off guard and soaked the outdoor event.
突然の豪雨でみんなが驚き、屋外イベントはずぶ濡れになった。
C1 verb /dɪsˈhɑːrtn/

dishearten

落胆させる
Meaning
to cause someone to lose determination or confidence; to discourage
Example
The constant rejection letters began to dishearten the young writer.
継続的な拒否の手紙が若い作家を落胆させ始めた。
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 /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 /ˌdɪsˈmaʊnt/

dismount

降りる
Meaning
to get off or down from something, especially a horse, bicycle, or motorcycle
Example
The rider dismounted from the horse after a long journey.
長い旅の後、ライダーは馬から降りた。
C1 noun delˈteɪɪk ˈlændskeɪp

deltaic landscape

デルタ地形
Meaning
A geographical area formed by sediment deposits at the mouth of a river, creating a triangular land formation.
Example
Bangladesh has a unique deltaic landscape.
バングラデシュにはユニークなデルタ地形があります。
C1 verb /dɪsˈbænd/

disband

解散する
Meaning
to break up and stop functioning as a group or organization
Example
The club decided to disband after twenty years of activity.
クラブは20年の活動後に解散することを決定した。
C1 noun/verb /dɪsˈdeɪn/

disdain

Meaning
The feeling that someone or something is unworthy of respect; to regard with contempt.
Example
She looked at the messy room with open disdain.
C1 noun /dɪˌnɒmɪˈneɪʃən/

denomination

宗派, 価値
Meaning
a recognized autonomous branch of the Christian Church; a unit of value or currency
Example
The church belongs to a Protestant denomination.
その教会はプロテスタントの宗派に属しています。
C1 noun /daɪˈvɜː.ʃən/

Diversion

迂回
Meaning
the action of turning something aside from its course; an activity that diverts the mind
Example
The road closure forced a diversion through the countryside for all travelers.
道路の閉鎖により、すべての旅行者は田舎道を通って迂回することを余儀なくされました。
C1 noun /dɪn/

din

騒音
Meaning
a loud, unpleasant, and prolonged noise
Example
The din of traffic outside made it hard to concentrate.
外の交通の騒音が集中するのを困難にしていた。
C1 noun /ˌdaɪəˈrɑːmə/

diorama

ジオラマ
Meaning
a three-dimensional model representing a scene, often with miniature figures
Example
The museum displayed a diorama of an ancient village.
博物館に古代の村のジオラマが展示されていました。
C1 noun /ˌdiːˈmer.ɪt/

Demerit

欠点; 不利; 過ちや違反に対して与えられるマーク
Meaning
a fault or disadvantage; a mark given for a fault or offense
Example
The student received a demerit for arriving late to class repeatedly.
その生徒は繰り返し遅刻したため、デメリットを受けました。
C1 noun /ˈdɪm.pəl/

Dimple

えくぼ
Meaning
a small depression in the flesh, either one that exists permanently or one that forms when smiling
Example
Her charming dimples appeared whenever she smiled at the children.
彼女の魅力的なえくぼは、子供たちに微笑むたびに現れました。
C1 noun daɪˈkɒtəmi

dichotomy

二項対立
Meaning
A division or contrast between two things that are or are represented as being opposed or entirely different.
Example
The dichotomy between tradition and modernity is often debated.
伝統と現代の二分法はよく議論されます。
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 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 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 noun /dɪsˈɪntrəst/

disinterest

無関心
Meaning
lack of interest or concern
Example
His disinterest in the project was obvious.
そのプロジェクトへの無関心は明らかだった。
C1 noun /ˈdɪs.ə.nəns/

dissonance

不協和音
Meaning
Disagreement, lack of harmony, conflict between ideas or beliefs.
Example
The cultural dissonance created misunderstandings.
文化的な不協和音が誤解を生んだ。
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 /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 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/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 adjective draʊt rɪˈzɪs.tənt

drought-resistant

耐乾燥
Meaning
Able to survive and grow despite limited water availability or drought conditions.
Example
Drought-resistant crops can survive in arid conditions.
耐乾燥作物は乾燥した条件でも生き残ることができます。
C1 noun /ˈdeɪ.li.ə/

Dahlia

ダリア
Meaning
a garden plant with brightly colored flowers that bloom in summer and autumn
Example
She planted colorful dahlias in her garden last summer.
彼女は昨年の夏に庭にカラフルなダリアを植えました。
C1 noun /ˌdɛməˈlɪʃən/

demolition

解体
Meaning
the act or process of destroying a building or structure
Example
The demolition of the old factory took several weeks.
古い工場の解体には数週間かかりました。
C1 noun /ˈdaɪhɑːrd/

diehard

Meaning
A person who strongly resists change and remains loyal to a belief or cause.
Example
He is a diehard fan of classic rock music.
C1 verb /dɪˈflɛkt/

deflect

反らす / 避ける
Meaning
to cause something to change direction; to avoid answering directly
Example
The shield deflected the incoming arrow.
盾は飛んできた矢を反らした。
C1 verb /dɪˈfjuːz/

diffuse

Meaning
to spread over a wide area or among a large number of people
Example
The smell of fresh bread diffused through the entire house.
C1 noun /dɪˈprɛsənt/

depressant

抑制剤
Meaning
A drug that reduces functional or nervous activity in the body.
Example
Alcohol acts as a depressant on the central nervous system.
アルコールは中枢神経系に抑制剤として作用します。
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 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 noun /ˌdɒmɪˈneɪʃən/

domination

支配
Meaning
the exercise of control or influence over someone or something
Example
The empire sought domination over its neighbors.
帝国は隣国に対する支配を求めていた。
C1 verb /dɪˈpɔːrt/

deport

国外追放
Meaning
To expel a foreigner from a country, usually for legal or political reasons.
Example
The government decided to deport the illegal immigrants.
政府は不法移民をデポートすることを決定した。
C1 noun /dɜːrθ/

dearth

不足
Meaning
A scarcity or lack of something.
Example
There was a dearth of food during the famine.
飢饉の間に食料が不足していた。
C1 verb /dɪˈbeɪs/

debase

低下させる
Meaning
to reduce the quality, value, or dignity of something
Example
Corruption can debase the values of a society.
腐敗は社会の価値観を低下させる可能性があります。
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 verb /dɪsˈpærɪdʒ/

disparage

Meaning
to criticize someone or something in a way that shows a lack of respect
Example
It is unfair to disparage people for their opinions.
C1 noun /ˌdep.rɪˈveɪ.ʃən/

deprivation

剥奪, 欠乏, 不足
Meaning
The damaging lack of material benefits considered to be basic necessities in a society.
Example
Sleep deprivation affects cognitive function.
睡眠不足は認知機能に影響を与えます。
C1 noun /ˌdɪs.əˈreɪ/

disarray

混乱
Meaning
A state of disorganization or untidiness; confusion or disorder.
Example
His desk was in complete disarray.
彼の机は完全に混乱していました。
C1 noun, adjective /dɪˈfiːtɪst/

defeatist

敗北主義者
Meaning
A person who expects or is excessively ready to accept failure; showing a tendency to expect defeat.
Example
His defeatist attitude discouraged the rest of the team.
彼の敗北主義的な態度は、チームの他のメンバーを落胆させました。
C1 verb /dɪˈbɑːr/

debar

禁止する
Meaning
To officially prevent someone from doing something.
Example
He was debarred from entering the competition due to cheating.
彼は不正行為のため競技への参加が禁止されました。
C1 noun dɪˌlɪb.əˈreɪ.ʃən

deliberation

熟考
Meaning
Long and careful consideration or discussion.
Example
The agreement was finalized after much deliberation.
その合意は多くの熟考の末に最終決定されました。
C1 verb /dɪsˈlɒdʒ/

dislodge

追い出す
Meaning
To remove or force out from a position, especially one that is fixed or hard to move.
Example
The troops dislodged the enemy from the hill.
部隊は敵を丘から追い出した。
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, 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 noun /dɪˌlɪb.əˈreɪ.ʃənz/

deliberations

審議
Meaning
Careful consideration and discussion before making decisions.
Example
Deliberations on sustainability continued for hours.
持続可能性についての審議は何時間も続きました。
C1 adjective /ˌdɪsɪnˈdʒɛnjʊəs/

disingenuous

不誠実な
Meaning
not candid or sincere; giving a false appearance of honesty or openness
Example
She gave a disingenuous excuse for missing the meeting.
彼女は会議に出席しないために不誠実な言い訳をしました。
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 /daɪər/

Dire

深刻な; 緊急の; 恐ろしい
Meaning
extremely serious; urgent; terrible
Example
The country is facing a dire economic crisis.
その国は深刻な経済危機に直面している。
C1 adjective /dæft/

daft

ばか
Meaning
Silly or foolish.
Example
It was a daft idea to go hiking without water.
水なしでハイキングに行くのはばかげた考えでした。
C1 adjective /dɪˈsɪd.ju.əs/

deciduous

落葉樹
Meaning
Referring to trees that shed their leaves seasonally, typically in autumn.
Example
Oak and maple trees are deciduous, shedding leaves in autumn.
オークとカエデの木は落葉樹で、秋に葉を落とします。
C1 noun /ˈdɛsɪˌbɛl/

decibel

デシベル
Meaning
a unit used to measure the intensity of sound
Example
The noise level in the factory exceeded 90 decibels.
工場の騒音レベルは90デシベルを超えました。
C1 noun /ˈdɛljuːdʒ/

deluge

洪水
Meaning
A severe flood; an overwhelming quantity of something.
Example
The town was hit by a deluge of rain in just a few hours.
その町は数時間で豪雨の洪水に襲われました。
C1 noun /dɪˌpriː.ʃiˈeɪ.ʃən/

depreciation

減価償却
Meaning
A reduction in the value of an asset with the passage of time, due to wear and tear.
Example
The car's depreciation rate is high after five years.
車の減価償却率は5年後に高くなります。
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 verb /dʌb/

dub

吹き替え
Meaning
to give a name or label to something; to add a soundtrack to a film or recording
Example
The movie was dubbed into several languages for international release.
その映画は国際公開のためにいくつかの言語に吹き替えられました。
C1 noun /dɪˈfjuːʒən/

diffusion

Meaning
the spreading of something more widely or the movement of particles from high to low concentration
Example
The diffusion of information on social media is rapid.
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 /dɪˈfɪʃ.ən.si/

Deficiency

不足; 欠乏; 不足感
Meaning
a lack or shortage of something; inadequacy or insufficiency
Example
The doctor diagnosed a vitamin D deficiency in the patient's blood test.
医師は患者の血液検査でビタミンDの不足を診断しました。
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 ˈdɪk.ʃən

diction

発音と単語の選択
Meaning
The style of pronunciation and word choice in speaking or writing.
Example
A strong diction enhances communication skills.
強いディクションはコミュニケーション能力を向上させます。
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 noun /ˈdɪŋɡi/

dinghy

ディンギーボート
Meaning
a small boat, often carried or towed by a larger vessel, used for short trips or as a lifeboat
Example
They rowed the dinghy back to the yacht.
彼らはヨットに戻るためにディンギーを漕いだ。
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 /dɪˈmaɪz/

demise

死 / 終わり
Meaning
Death or end of something, especially the end of an institution or system.
Example
The sudden demise of the company shocked investors.
会社の突然の倒産は投資家を驚かせました。
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。