delirium
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C1 noun /dɪˈlɪriəm/

delirium

錯乱
Meaning
An acutely disturbed state of mind characterized by restlessness, illusions, and incoherence.
Example
The patient experienced delirium after the surgery due to the strong medication.
患者は手術後、強い薬物の影響で錯乱状態を経験しました。
C2 adjective /dɪˈskrɛpənt/

discrepant

不一致の
Meaning
showing a difference or inconsistency
Example
The witnesses gave discrepant accounts of the incident.
目撃者たちは事件について食い違った証言をしました。
C2 noun /ˌdɛspəˈrɑːdoʊ/

desperado

Meaning
A bold, reckless, or dangerous person, often a criminal.
Example
The sheriff was determined to capture the desperado who terrorized the town.
C2 verb /dɪˈspɒnd/

despond

落ち込む
Meaning
to lose confidence or hope; to become dejected
Example
After repeated failures, he began to despond.
繰り返しの失敗の後、彼は落ち込むようになった。
A2 noun /ˈdʌzən/

dozen

ダース
Meaning
a group of twelve
Example
She bought a dozen eggs from the market.
彼女は市場でダースの卵を買いました。
B2 verb /dʌmp/

dump

何かを無駄に捨てるまたは放置する
Meaning
to drop or dispose of something carelessly; to end a relationship suddenly
Example
He dumped all the trash into the bin.
彼はゴミをすべてゴミ箱に捨てた。
B2 verb /dɪˈvaɪz/

devise

考案する
Meaning
To plan or invent something carefully.
Example
The engineers devised a new method to reduce costs.
エンジニアたちはコスト削減のために新しい方法を考案した。
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。
C2 noun /ˈdɛkəˌpɒd/

decapod

十脚目
Meaning
An arthropod with ten limbs, such as crabs, lobsters, and shrimps.
Example
The lobster is a well-known decapod.
ロブスターは有名な十脚目です。
B2 adjective /dɪˈstɪŋktɪv/

distinctive

特徴的
Meaning
having a quality or characteristic that makes something different and easily noticed
Example
The restaurant is known for its distinctive flavors.
そのレストランは独特の風味で知られています。
C2 noun /ˈdɪti/

ditty

短い歌
Meaning
a short, simple song or poem
Example
She sang a cheerful little ditty while cooking.
彼女は料理をしながら陽気な小さな歌を歌っていた。
B2 adjective /dæmp/

damp

湿った
Meaning
slightly wet, often in an unpleasant way
Example
The room felt cold and damp after the rain.
雨の後、部屋は冷たくて湿っていると感じました。
B2 noun /dɛk/

deck

デッキ / プラットフォーム
Meaning
A flat surface or platform, often on a ship or building.
Example
We enjoyed the sunset from the upper deck of the ferry.
私たちはフェリーの上デッキから夕日を楽しみました。
C1 adjective /dɪˈbeɪst/

debased

劣化した
Meaning
having lost quality, value, or moral character
Example
The debased currency lost the trust of the people.
劣化した通貨は人々の信頼を失った。
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。
B2 noun /dɪsˈtrɛs/

distress

苦痛
Meaning
extreme anxiety, sorrow, or pain
Example
He felt a deep sense of distress when he heard the bad news.
悪い知らせを聞いたとき、彼は深い苦痛を感じました。
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。
C2 noun /ˌdɪskənˈtɪnjʊəns/

discontinuance

中止
Meaning
the act of stopping something, especially permanently
Example
The discontinuance of the service disappointed many customers.
サービスの中止は多くの顧客を失望させました。
B2 noun /diːp ˈkʌlər/

Deep colour

深い色
Meaning
a rich, intense, or dark shade of any color
Example
The artist used deep colours to create a dramatic effect.
アーティストはドラマチックな効果を作り出すために深い色を使いました。
B1 adjective /ˈdaɪɪŋ/

Dying

死にかけている; 死亡している;
Meaning
approaching death; in the process of dying; fading away
Example
The dying plant needs water immediately.
死にかけている植物は直ちに水が必要です。
B2 noun/verb /dɪˈpɑːzɪt/

deposit

預金, 手付金
Meaning
to place money in a bank account, or a sum paid in advance as security; a layer of material left naturally
Example
She deposited $500 into her savings account.
彼女は貯金口座に500ドルを預けました。
C2 noun /dɪsˈtɛmpər/

distemper

犬に感染するウイルス性疾患
Meaning
a viral disease affecting animals, especially dogs; also refers to a state of disorder
Example
The dog was diagnosed with distemper and needed immediate care.
その犬はディステンパーと診断され、即座の治療が必要でした。
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 adjective /dɪˈskriːt/

discrete

離散的
Meaning
individually separate and distinct
Example
The course is divided into three discrete modules.
コースは3つの離散的なモジュールに分けられています。
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。
B1 noun /ˌdɛmənˈstreɪʃən/

demonstration

デモ, 示威
Meaning
the act of showing something clearly, or a public protest
Example
The workers organized a demonstration for better wages.
労働者たちはより良い賃金のためにデモを組織した。
A1 noun /dɔːɡ/

Dog

犬
Meaning
a domesticated carnivorous mammal that is typically kept as a pet or for work
Example
The loyal dog waited patiently for its owner to return home.
忠実な犬は、主人が家に帰るのを辛抱強く待っていました。
B2 noun /ˈdeɪtəbeɪs/

database

データベース
Meaning
a structured collection of data stored and accessed electronically
Example
The company's customer details are stored in a secure database.
会社の顧客情報は安全なデータベースに保存されています。
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。
B2 noun, verb /ˈdɪskɔːrs/

discourse

談話, 講義
Meaning
Written or spoken communication or debate.
Example
The professor gave a discourse on ancient philosophy.
教授は古代哲学についての講義を行った。
B2 verb /dɪˈpraɪv/

deprive

Meaning
to take something away from someone, or prevent them from having it
Example
The new law may deprive people of their rights.
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。
C2 verb /dɪˈmɜːr/

demur

異議を唱える
Meaning
to raise doubts, objections, or show reluctance
Example
She agreed to help without demur.
彼女は異議なく手伝うことに同意しました。
B1 noun /dɪˈskʌvəri/

discovery

発見
Meaning
The act of finding or learning something for the first time.
Example
The discovery of penicillin changed medical history.
ペニシリンの発見は医学の歴史を変えた。
A2 noun /dɒl/

doll

人形
Meaning
a small toy resembling a human figure, especially for children
Example
The little girl hugged her favorite doll tightly.
小さな女の子はお気に入りの人形をしっかり抱きしめました。
B2 adverb /ˈdʌbli/

doubly

二重に
Meaning
in a twofold manner; to twice the degree
Example
She felt doubly fortunate after winning the prize and getting a promotion.
彼女は賞を受賞し、昇進した後、二重に幸運だと感じました。
A2 verb dɪˈvɛləp

develop

発展させる
Meaning
To grow or bring to a more advanced or effective state; to start to exist, experience, or possess gradually.
Example
Develop a brand based on your passion and skills.
情熱とスキルに基づいてブランドを発展させましょう。
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。
A2 adjective /ˈdɜː.ti/

Dirty

汚い; よごれた; 不快な; 道徳的に堕落した
Meaning
not clean; covered with dirt; unpleasant; morally corrupt
Example
The kitchen was dirty after cooking.
料理後、台所は汚かった。
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。
A2 noun /ˈdɪs.təns/

Distance

距離
Meaning
the length of space between two points; remoteness in place, time, or relationship
Example
The distance between the two cities is approximately three hundred kilometers.
2つの都市間の距離は約300キロメートルです。
C2 verb /dɪˈsɛvər/

dissever

分ける
Meaning
To separate or cut apart.
Example
The treaty sought to dissever the two hostile regions.
条約は二つの敵対的な地域を分割しようとした。
B2 noun ˌdiː.fɒr.ɪˈsteɪ.ʃən

deforestation

森林伐採
Meaning
The action of clearing a wide area of trees; the permanent destruction of forests in order to make the land available for other uses.
Example
Deforestation accelerates the loss of biodiversity.
森林伐採は生物多様性の喪失を加速させます。
C2 verb /diːˈfrɑːk/

defrock

神父の職を剥奪する
Meaning
to officially remove a priest or minister from their position and authority
Example
The church decided to defrock the priest after the scandal.
教会はスキャンダルの後、神父を職務停止にしました。
C2 noun /ˌdaɪ.jʊˈret.ɪk/

diuretic

利尿剤
Meaning
A substance that promotes the production of urine.
Example
Coffee has a mild diuretic effect.
コーヒーは軽い利尿作用があります。
C2 verb /ˈdɛsɪkreɪt/

desecrate

冒涜する
Meaning
to treat a sacred place or object with disrespect or violation
Example
The vandals desecrated the ancient temple walls with graffiti.
ヴァンダルたちは古代の寺院の壁をグラフィティで冒涜しました。
B1 adjective /ˈdefɪnət/

Definite

明確な; はっきりした; 特定の
Meaning
clearly stated or decided; not vague or uncertain; specific
Example
We need a definite answer by tomorrow.
私たちは明日までに明確な答えが必要です。
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.
C2 adjective /dɪˈfjuːzəbl/

diffusible

拡散可能な
Meaning
able to spread or be spread through a medium
Example
Oxygen is diffusible through cell membranes.
酸素は細胞膜を通じて拡散することができます。
A2 noun /ˈdiː.teɪl/

detail

詳細
Meaning
An individual feature, fact, or item of information.
Example
She explained the plan in great detail.
彼女は計画を詳細に説明しました。
C1 adjective /ˌdaɪəˈbɒlɪkəl/

diabolical

悪魔的
Meaning
Wicked, cruel, or outrageously bad; resembling the devil.
Example
The dictator’s diabolical rule brought misery to the nation.
独裁者の悪魔的な支配は国に苦しみをもたらした。
B2 noun /ˈdrɔː.bæk/

Drawback

欠点; 不利な点; 問題
Meaning
a feature that renders something less acceptable; a disadvantage or problem
Example
The main drawback of living in the city is the high cost of housing.
都市での生活の主な欠点は高い住宅費です。
A2 noun /ˈdʌst.bɪn/

Dustbin

ゴミ箱
Meaning
a container for holding waste or garbage before disposal
Example
Please throw the paper into the dustbin after use.
使用後は紙をゴミ箱に捨ててください。
C2 adjective /ˈdoʊlfəl/

Doleful

悲しげな; 哀れな;
Meaning
sorrowful; mournful; expressing grief or sadness
Example
She gave him a doleful look when he left.
彼が去ったとき、彼女は悲しげな表情を彼に向けた。
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 noun /ˈdiːviəns/

deviance

逸脱
Meaning
Behavior that differs from accepted social or moral standards.
Example
The book studies deviance in urban youth culture.
その本は都市の若者文化における逸脱を研究しています。
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。
B2 verb dɪˈtɪəriəreɪt

deteriorate

悪化する
Meaning
To become progressively worse in quality, condition, or performance; to decline.
Example
Unplanned growth can deteriorate living conditions.
計画外の成長は生活環境を悪化させる可能性があります。
C2 noun /ˈdoʊneɪtər/

donator

寄付者
Meaning
A person who gives something, especially money or goods, as a donation.
Example
The donator wished to remain anonymous after contributing a large sum.
寄付者は大きな金額を寄付した後、匿名でいることを希望しました。
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 adjective /dɪˈfɛnsəbəl/

defensible

守ることができる / 正当化できる
Meaning
Capable of being protected against attack or criticism; justifiable.
Example
Her decision was legally defensible.
彼女の決定は法的に守ることができた。
C2 adjective /dɪˈstɛnsəbl̩/

distensible

伸縮可能な
Meaning
Capable of being stretched or expanded.
Example
The stomach is a distensible organ that can expand after eating.
胃は食後に膨らむことができる伸縮可能な器官です。
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 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 /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 adjective dɪˈskrɪmɪnətɔːri

discriminatory

差別的
Meaning
Making or showing an unfair or prejudicial distinction between different categories of people or things.
Example
Discriminatory policies triggered protests.
差別的な政策は抗議を引き起こしました。
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。
A2 noun /ˈdæn.sər/

Dancer

ダンサー
Meaning
a person who performs dance, typically as a profession or art form
Example
The dancer performed gracefully on the stage.
ダンサーはステージで優雅に踊った。
B1 noun, verb /ˈdɪskaʊnt/

discount

割引
Meaning
A reduction in the usual price of something; to reduce the price of something.
Example
The store offered a 20% discount on all electronics.
その店はすべての電子製品に20%の割引を提供しました。
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。
B2 verb /ˈdɑːrkən/

darken

暗くする
Meaning
to make or become dark; to reduce brightness or light
Example
The clouds began to darken the sky before the storm.
嵐の前に雲が空を暗くし始めた。
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。
B2 verb /dɪˈfaɪ/

defy

挑戦する
Meaning
to openly resist or refuse to obey someone or something; to challenge or dare someone to do something
Example
The protesters continued to defy the government's ban on public gatherings.
抗議者たちは政府の公共集会禁止令に対して引き続き挑戦しました。
B2 noun /dwɔːrf/

dwarf

小人
Meaning
a person, animal, or plant much smaller than average
Example
Snow White lived with seven dwarfs.
白雪姫は7人の小人と一緒に暮らしていました。
C2 verb /ˌdɪspəˈzɛs/

dispossess

没収する
Meaning
to deprive someone of land, property, or other possessions
Example
The new law threatened to dispossess many farmers of their land.
新しい法律は多くの農民から土地を奪うと脅迫していました。
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。
B2 verb /dɪsˈtʃɑːrdʒ/

discharge

退院
Meaning
to release or dismiss from duty; to emit or give off
Example
The hospital will discharge the patient tomorrow.
病院は明日患者を退院させる。
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 verb /dɪsˈoʊn/

disown

拒絶する
Meaning
to refuse to acknowledge or accept responsibility for someone or something
Example
He decided to disown his reckless brother.
彼は無謀な兄を拒絶する決断をしました。
B2 noun /ˈdræɡ.ən.flaɪ/

Dragon-fly

トンボ
Meaning
a large insect with four transparent wings that lives near water
Example
The dragonfly hovered over the pond.
トンボは池の上を飛んでいた。
A2 noun /ˈdeɪ.tə/

Data

データ
Meaning
facts and statistics collected together for reference or analysis; information in digital form
Example
Scientists analyzed the data from thousands of experiments to reach their conclusion.
科学者たちは、何千もの実験から得られたデータを分析して、結論に達しました。
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 /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。
C2 adjective /dɪˈsɛnʃəs/

dissentious

対立を引き起こす
Meaning
Causing or likely to cause disagreement and conflict.
Example
His dissentious remarks divided the group further.
彼の対立的な発言は、グループをさらに分裂させた。
C2 verb /daʊz/

dowse

水や鉱物を占いの棒で探す; または液体で浸すまたは消火する。
Meaning
To search for underground water or minerals using a divining rod; also to drench or extinguish with liquid.
Example
The farmer tried to dowse for water in the dry field.
農夫は乾燥した畑で水を探すためにダウズしようとした。
C2 noun /dɪˈspɔɪlər/

despoiler

略奪者
Meaning
A person who robs, plunders, or violently takes things from others.
Example
The despoilers left the city in ruins.
略奪者たちは街を廃墟にした。
C1 verb /ˌdɪsɪmˈbɑːrk/

disembark

降りる
Meaning
To leave a ship, aircraft, or other vehicle.
Example
The passengers disembarked from the plane after landing.
乗客は着陸後、飛行機から降りました。
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。
A2 verb /dɪˈskʌs/

discuss

話し合う
Meaning
To talk about something with another person or group in detail.
Example
We need to discuss the project before finalizing it.
プロジェクトを最終決定する前に、それを話し合う必要があります。
B2 verb /ˈdɛvəˌsteɪt/

devastate

荒廃させる
Meaning
to cause severe and overwhelming destruction or damage
Example
The hurricane devastated the coastal town.
ハリケーンは沿岸の町を荒廃させた。
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 /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。
B1 adjective /drəˈmæt.ɪk/

Dramatic

ドラマチック; 突然で驚くべき; 興奮させると印象的
Meaning
relating to drama; sudden and striking; exciting and impressive
Example
The dramatic sunset painted the sky in brilliant colors.
ドラマティックな夕焼けが空を明るい色で染めた。
B2 verb dɪˈspætʃt

dispatched

派遣された
Meaning
To send off to a destination or for a purpose.
Example
A team was dispatched quickly.
チームは迅速に派遣されました。
B2 noun /dɪsˈrʌp.ʃən/

disruption

混乱
Meaning
Barrier or interruption, sudden disturbance in any process or service.
Example
The road construction caused major disruption in traffic flow.
道路建設は交通の流れに大きな混乱を引き起こしました。
C2 noun /dɪˈklɪvɪti/

declivity

傾斜
Meaning
a downward slope of ground
Example
They carefully climbed down the declivity of the hill.
彼らは慎重に丘の傾斜を登った。
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.
C2 adjective /ˈdaʊ.di/

dowdy

時代遅れ / ださい
Meaning
unfashionable, dull, or shabby in appearance
Example
She wore a dowdy dress to the party.
彼女はパーティーに時代遅れのドレスを着ていた。
B1 adjective /ˌdɪs.əˈpɔɪn.tɪd/

Disappointed

がっかり
Meaning
sad because something has not happened or is not as good as expected
Example
She was disappointed with her exam results.
彼女は試験の結果にがっかりしていた。
C2 adjective /ˈdɛdˌpæn/

deadpan

無表情
Meaning
Deliberately impassive or expressionless in manner.
Example
She delivered the joke in a completely deadpan voice.
彼女は完全に無表情な声でジョークを言った。
B2 verb /dɪˈtɜːr/

deter

Meaning
to discourage someone from doing something by instilling doubt or fear
Example
High fines are meant to deter people from breaking the law.
C1 verb dɪˈsaɪ.fɚ

decipher

解読する, 暗号を解く, 翻訳する
Meaning
To convert something written in code into normal language; to succeed in understanding the meaning of something.
Example
It took hours to decipher the ancient script.
古代の文字を解読するのに何時間もかかりました。
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 /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 /ˈdaʊri/

dowry

持参金
Meaning
Property or money brought by a bride to her husband at marriage.
Example
The dowry tradition is still followed in some cultures.
いくつかの文化では、持参金の伝統が今でも守られています。
B2 adverb /ˈden.sli/

densely

密に
Meaning
In a closely compacted or crowded manner.
Example
The area is densely covered with trees.
その地域は密に木々で覆われています。
C2 noun /ˈduːti/

Dhuti

ドゥティ
Meaning
a traditional Indian garment for men consisting of a piece of unstitched cloth worn around the waist and legs
Example
The elderly man wore a white dhuti during the religious ceremony.
年配の男性は宗教的な儀式で白いドゥティを着ていた。
B2 verb /dɪˈzɒlv/

dissolve

Meaning
to melt or become liquid; to officially end or break up an agreement or organization
Example
The sugar will dissolve quickly in hot tea.
B1 noun /dɪsk/

disk

ディスク / データ保存装置
Meaning
a flat, circular object, often used to store data electronically
Example
All the data is saved on a hard disk.
すべてのデータはハードディスクに保存されています。
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。
B1 noun, verb /dɪˈzaɪər/

desire

欲望
Meaning
a strong feeling of wanting something or wishing for something to happen
Example
He has a strong desire to travel the world.
彼は世界を旅行したいという強い欲望を持っています。
C2 noun /ˈdɔɪən/

doyen

尊敬される人物
Meaning
The most respected or prominent person in a particular field.
Example
He is regarded as the doyen of modern literature in the country.
彼はその国の現代文学のドイエンと見なされています。
A1 noun /dɪˈsɛmbər/

december

12月
Meaning
the twelfth and last month of the year in the Gregorian calendar
Example
December is usually cold in many countries.
12月は多くの国で寒いです。
C2 adjective /ˈdɪsəluːt/

dissolute

放蕩
Meaning
lacking moral restraint; indulging excessively in sensual pleasures
Example
He led a dissolute life filled with parties and gambling.
彼はパーティーとギャンブルで満ちた放蕩の生活を送った。
C2 adjective /ˈdjuːtiəbl/

dutiable

課税対象
Meaning
subject to customs duty or tax
Example
Imported electronics are often dutiable at the border.
輸入された電子機器はしばしば国境で課税対象となります。
B2 noun /dɪsˈmeɪ/

Dismay

失望; 驚き
Meaning
concern and distress caused by something unexpected; consternation or alarm
Example
To our dismay, the concert was cancelled due to severe weather conditions.
私たちの失望の中、コンサートは悪天候のためキャンセルされました。
B2 verb /dɪˈtætʃ/

detach

分離する
Meaning
to separate or remove something from something else
Example
She detached the page from the notebook.
彼女はノートからページを切り離しました。
C2 noun /ˈdɛkəˌlɔːɡ/

decalogue

Meaning
The Ten Commandments in the Bible; a set of fundamental rules or principles.
Example
The priest gave a sermon on the importance of the Decalogue.
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。
B1 verb /dɪˈzɜːrv/

deserve

値する
Meaning
To be worthy of something, usually a reward or punishment.
Example
She worked hard and deserves recognition.
彼女は一生懸命働き、認められる価値がある。
B1 adjective /dʌl/

Dull

退屈な; つまらない; 無気力な; 愚かな;
Meaning
lacking interest or excitement; not bright; lacking intelligence; tedious
Example
The lecture was very dull and boring.
その講義はとても退屈で退屈でした。