descendent
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B2 adjective /dɪˈsɛndənt/

descendent

下降する
Meaning
Moving downward; going down or descending.
Example
The river followed a descendent course toward the valley.
川は谷に向かって下降するコースをたどった。
C2 adjective /dɪˈkrɛpɪt/

decrepit

老朽
Meaning
worn out or weakened by age or neglect
Example
The decrepit old house was on the verge of collapse.
その老朽化した家は崩壊寸前でした。
C2 noun /ˈdɛvɪltrɪ/

deviltry

悪魔的な行為
Meaning
Cruel or malicious behavior; mischief with an evil aspect.
Example
The villain’s deviltry terrified the townsfolk.
悪党の悪魔的な行為は町の人々を恐れさせました。
B1 noun ˌdɪsədˈvæntɪdʒ

disadvantage

不利
Meaning
An unfavorable circumstance or condition that reduces the chances of success or effectiveness.
Example
Urdu's dominance placed Bengalis at a disadvantage.
ウルドゥー語の支配がベンガル語話者を不利な立場に追い込んだ。
B1 adjective /dɪsˈɡʌstɪŋ/

disgusting

嫌な
Meaning
extremely unpleasant or offensive; causing strong dislike or revulsion
Example
The smell coming from the trash can was absolutely disgusting.
ゴミ箱からの臭いは完全に嫌なものでした。
C2 adjective /ˌdɒktrɪˈnɛər/

doctrinaire

教条主義者
Meaning
stubbornly devoted to a theory or doctrine without regard to practical considerations
Example
His doctrinaire approach to politics alienated many supporters.
彼の教条主義的な政治アプローチは、多くの支持者を遠ざけた。
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。
B2 noun /ˌdɪstrɪˈbjuːʃən/

distribution

配布
Meaning
the act of sharing or delivering something to multiple people or places
Example
The company manages the distribution of food supplies to rural areas.
その会社は農村地域への食品供給の配布を管理しています。
A1 noun /dɛsk/

desk

机
Meaning
a piece of furniture with a flat surface used for writing or working
Example
The books are on the desk.
本は机の上にあります。
C2 verb /deɪn/

deign

自分の尊厳を損ねて何かをする
Meaning
to do something considered beneath one's dignity
Example
The king did not deign to reply to the commoner.
王は平民に返答することをしなかった。
C2 verb /dɔːb/

daub

塗る
Meaning
to spread a thick or sticky substance carelessly on a surface
Example
The children daubed paint all over the walls.
子供たちは壁にペンキを塗り広げました。
B2 verb /drɪft/

drift

漂う
Meaning
to move slowly, especially by air or water currents
Example
The boat began to drift away from the shore.
ボートは岸から離れ始めた。
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 /ˈdɔː.tər/

Daughter

娘
Meaning
a female offspring; a young woman in relation to her parents
Example
Their daughter graduated from medical school with top honors.
彼らの娘は医学校を優秀な成績で卒業しました。
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 /ˈduːmz.deɪ/

Doomsday

世界の終わり; 最後の審判の日
Meaning
the last day of the world's existence; a time of catastrophic destruction
Example
The preacher spoke about doomsday and the importance of preparing spiritually.
伝道師は世界の終わりと霊的な準備の重要性について話しました。
B1 adjective /def/

Deaf

耳が聞こえない; 聴覚障害がある
Meaning
unable to hear; having a hearing impairment
Example
The deaf child learned to communicate using sign language.
そのろうの子供は手話を使ってコミュニケーションを学びました。
B2 verb /dɪˈstɪŋɡwɪʃ/

distinguish

区別する
Meaning
to recognize or show the differences between two or more things; to set apart as different
Example
It can be difficult to distinguish between truth and rumor.
真実と噂を区別するのは難しいかもしれません。
A1 noun /dɔːr/

Door

ドア
Meaning
a movable barrier used to close an entrance to a building or room
Example
Please close the door when you leave the room.
部屋を出るときはドアを閉めてください。
A2 verb /drɔː/

draw

描く
Meaning
to create pictures or designs with a pencil or pen
Example
She draws beautiful landscapes in her spare time.
彼女は余暇に美しい風景を描きます。
C1 noun /dɪˈsɜːn.mənt/

discernment

洞察力
Meaning
The ability to judge well or understand something correctly; keen insight.
Example
His discernment in business decisions made him successful.
彼のビジネスの決定における洞察力は彼を成功させた。
C2 adjective /ˈdɪfɪdənt/

diffident

Meaning
Shy or lacking confidence in one's own abilities.
Example
He was too diffident to ask a question in class.
B2 adjective /dɪˈraɪvd/

derived

派生した
Meaning
Developed or obtained from something else; not original.
Example
The word is derived from Latin.
その単語はラテン語から派生しています。
B1 adjective /ˈdiːsənt/

decent

立派
Meaning
conforming to standards of propriety, good taste, or morality
Example
He found a decent job after months of searching.
彼は数ヶ月の探しの後、立派な仕事を見つけました。
B1 adjective /drʌŋk/

drunk

酔っ払った
Meaning
affected by alcohol to the point of losing control of one's faculties or behavior
Example
He was too drunk to walk straight.
彼は酔っ払って、まっすぐ歩けなかった。
C1 verb /dɪsˈpruːv/

disprove

反証する
Meaning
to show that something is false or wrong
Example
The scientist worked hard to disprove the old theory.
科学者は古い理論を反証するために一生懸命働いた。
B2 noun /doʊs/

dose

用量
Meaning
a measured amount of a medicine or drug taken at one time
Example
The doctor prescribed one dose of the medicine every six hours.
医者は6時間ごとに1回薬のドーズを処方しました。
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。
C2 verb /dɪsˈpɔːrt/

disport

楽しむ
Meaning
To amuse oneself in a lively or playful way.
Example
The children disported themselves in the garden.
子供たちは庭で楽しんでいました。
C2 verb /ˈdɛpɪleɪt/

depilate

脱毛する
Meaning
to remove hair from the skin, especially by mechanical or chemical means
Example
She decided to depilate her legs before the event.
彼女はイベントの前に足を脱毛することに決めました。
C2 noun /ˌdɛkləˈmeɪʃən/

declamation

朗読
Meaning
a formal speech delivered with rhetorical or dramatic effect
Example
Her declamation captivated the audience at the competition.
彼女の朗読は競技会で観客を魅了しました。
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。
B2 adjective /dɪˈsɛptɪv/

deceptive

騙すような
Meaning
Giving an appearance or impression different from the truth; misleading.
Example
Appearances can be deceptive.
外見は騙すようなものかもしれません。
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。
B2 noun /depθ/

Depth

深さ; 深いまたは深遠な特質
Meaning
the distance from the top or surface to the bottom; the quality of being intense or profound
Example
The depth of the ocean in this area reaches over three thousand meters.
この地域の海の深さは3,000メートルを超えています。
C2 noun /dɪˈtrækʃən/

detraction

非難
Meaning
The act of belittling or taking away from the value of something.
Example
Her constant detraction of others made her unpopular.
他人に対する彼女の絶え間ない非難は、彼女を不人気にした。
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.
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。
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 noun /ˌdel.ɪˈɡeɪ.ʃən/

delegation

代表団
Meaning
A group of people chosen to represent others in negotiations or discussions.
Example
The delegation presented their country's agenda.
代表団は自国の議題を提示しました。
C2 adjective /dɪˈmoʊniˌæk/

demoniac

悪魔的な
Meaning
possessed, produced, or influenced by a demon; frenzied or violent
Example
The soldiers fought with demoniac fury.
兵士たちは悪魔的な怒りで戦った。
B2 adjective /dɪˈstrɛst/

distressed

苦しんでいる
Meaning
feeling or showing extreme anxiety, sorrow, or pain
Example
She looked distressed after hearing the bad news.
悪い知らせを聞いた後、彼女は苦しんでいるように見えました。
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。
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。
C2 prefix /dɪs-/

dys-

異常、悪い、困難、または欠陥を意味する接頭辞
Meaning
A prefix meaning abnormal, bad, difficult, or impaired.
Example
Words like 'dysfunction' and 'dyslexia' use the prefix dys- to indicate difficulty or impairment.
'ディスファンクション'や'ディスレクシア'のような言葉は、困難や障害を示すためにディス-という接頭辞を使用します。
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 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 noun /dɪˌnʌnsiˈeɪʃən/

denunciation

非難 / 公共の告発
Meaning
the public condemnation or accusation of someone or something
Example
The journalist's article was a strong denunciation of corruption.
ジャーナリストの記事は腐敗に対する強い非難でした。
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。
C2 verb /dɪˈræsɪˌneɪt/

deracinate

根こそぎ引き抜く
Meaning
To uproot something completely; to displace people from their native environment or culture.
Example
The conflict deracinated many families from their homeland.
その紛争は多くの家族を故郷から追い出しました。
A2 verb /ˈdraɪvɪŋ/

driving

運転
Meaning
the act of controlling and operating a vehicle; guiding or motivating something forward
Example
She loves driving along the coast on weekends.
彼女は週末に沿岸をドライブするのが大好きです。
B2 noun /ˈdɔːr.mæt/

Door-mat

ドアマット
Meaning
a mat placed in front of a door for wiping feet
Example
Please wipe your feet on the door-mat before entering the house.
家に入る前にドアマットで足を拭いてください。
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。
B2 noun /ˈdeɪ.tə briːtʃ/

data breach

データ漏洩
Meaning
Unauthorized disclosure of sensitive information through security violation
Example
A data breach exposed millions of users' passwords.
データ漏洩により何百万人ものユーザーのパスワードが公開されました。
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 verb /dɔːnt/

daunt

脅す
Meaning
to make someone feel intimidated, discouraged, or less confident
Example
The steep climb did not daunt the experienced hikers.
急な登りは経験豊富なハイカーを怖がらせませんでした。
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 /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 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。
C2 adjective /daɪˈdæktɪk/

didactic

教育的な
Meaning
Intended to teach, often with a moral lesson.
Example
The novel is not just entertaining but also didactic in nature.
その小説はただの娯楽ではなく、教育的な性質も持っている。
C2 verb /dɪˈlæpɪdeɪt/

dilapidate

荒廃する
Meaning
To cause something, especially a building, to fall into ruin or disrepair.
Example
The abandoned house began to dilapidate over the years.
廃墟になった家は年月を経て崩壊し始めました。
A2 noun /ˈdɑrk.nəs/

Darkness

暗闇; 無知;
Meaning
the partial or total absence of light; wickedness or evil; ignorance or lack of knowledge
Example
The power outage plunged the entire city into darkness.
停電で町全体が暗闇に包まれた。
B2 adjective /dɪsˈɡreɪsfəl/

Disgraceful

恥ずべき; 不名誉な; 非難に値する
Meaning
shameful; bringing dishonor; worthy of condemnation
Example
His disgraceful behavior shocked everyone at the party.
彼の恥ずべき行動はパーティーでみんなを驚かせました。
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。
C2 verb /diːˈpɒpjʊˌleɪt/

depopulate

人口減少
Meaning
To reduce the number of people living in a place.
Example
The war threatened to depopulate the once-thriving town.
戦争はかつて繁栄していた町を人口減少させる脅威を与えた。
C2 noun /ˈdɛkəˌɡɒn/

decagon

十角形
Meaning
A polygon with ten sides and ten angles.
Example
The geometry teacher drew a perfect decagon on the board.
数学の先生は黒板に完璧な十角形を描きました。
C2 verb /ˈdiːɪfaɪ/

deify

神格化する
Meaning
to treat or worship someone or something as a god
Example
Some fans deify their favorite celebrities.
一部のファンはお気に入りの有名人を神のように崇拝します。
B2 adjective /ˈdɛntəl/

dental

歯科の
Meaning
relating to teeth or dentistry
Example
She goes for a dental checkup every six months.
彼女は6か月ごとに歯科検診を受けます。
C1 verb /dɪˈluːd/

delude

だます
Meaning
To mislead someone into believing something that is not true.
Example
He deluded himself into thinking he could win the race without training.
彼は訓練なしでレースに勝てると思い込み、自分をだました。
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。
B2 noun /dɪˈsep.ʃən/

Deception

欺瞞
Meaning
the action of deceiving someone; the state of being deceived
Example
The magician's deception amazed the audience with seemingly impossible tricks.
魔法使いの欺瞞は、観客を一見不可能なトリックで驚かせた。
B2 verb /dɪˈmɪnɪʃ/

diminish

Meaning
to make or become less; to reduce in size, importance, or value
Example
Over time, his influence in the company began to diminish.
C1 adjective /dɪˈfɪʃənt/

Deficient

不足している
Meaning
not having enough of a specified quality or ingredient; lacking or inadequate
Example
His diet was deficient in essential vitamins.
彼の食事は必要なビタミンが不足していた。
B2 noun /dɪˈpen.dəns/

Dependence

依存
Meaning
the state of relying on or needing someone or something for support; addiction
Example
His dependence on technology made it difficult for him to work without internet.
テクノロジーへの依存がインターネットなしでは仕事を困難にした。
C2 noun /dɪˈpɑːzɪtər/

depositor

預金者
Meaning
a person who places money in a bank or financial institution
Example
The bank provides insurance to protect depositors’ funds.
銀行は預金者の資金を保護するために保険を提供しています。
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。
B2 noun /dɪˈpen.dənt/

Dependent

依存している; 扶養されている
Meaning
a person who relies on another for financial support; someone who depends on others
Example
As a tax dependent, she could not file her own tax return separately.
税金の扶養控除対象者として、彼女は自分の税務申告を別々に提出することができませんでした。
A2 noun /ˈdaɪnɪŋ/

dining

食事
Meaning
the act of eating a meal, especially in a formal setting
Example
We enjoyed fine dining at the new restaurant.
私たちは新しいレストランで素晴らしい食事を楽しみました。
B2 noun ˈdɒmɪnəns

dominance

支配
Meaning
Power and influence over others; control or command.
Example
The dominance of Urdu was evident.
ウルドゥ語の支配は明らかだった。
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。
B2 verb /dɪˈsɛnd/

descend

Meaning
To move or fall downward; to come or go down from a higher place.
Example
The hikers descended the steep mountain path.
C2 verb /diːˈmoʊbəlaɪz/

demobilize

解散する
Meaning
To release from military service or to disband troops.
Example
The government decided to demobilize the army after the war.
政府は戦争後に軍隊を解散することを決定しました。
B2 verb, noun /dɑːrt/

dart

ダート/急に走る
Meaning
to move suddenly and quickly; a small pointed missile thrown at a target
Example
The cat darted across the street to avoid the car.
猫は車を避けるために急いで道路を横切りました。
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。
B1 noun /dʌst/

dust

ほこり
Meaning
Fine particles of matter.
Example
Road dust is a major pollutant in urban areas.
道路のほこりは都市部で主要な汚染物質です。
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。
B1 noun /ˌdek.əˈreɪ.ʃən/

Decoration

装飾; 飾り; 賞;
Meaning
the process or art of decorating something; ornamental items used to beautify
Example
The Christmas decoration transformed the ordinary room into a festive wonderland.
クリスマスのデコレーションは、普通の部屋をお祝いのワンダーランドに変えました。
C2 adjective /dɪsˈkɒnsələt/

disconsolate

慰めようのない
Meaning
very unhappy and unable to be comforted
Example
She was disconsolate after hearing the bad news.
悪い知らせを聞いた後、彼女は慰めようのない状態でした。
B2 adjective /ˈduː.əl/

Dual

二重の
Meaning
having two parts or consisting of two elements; double
Example
She has dual citizenship of both countries.
彼女は二つの国の二重国籍を持っています。
B2 noun /ˈdɪɡ.nə.ti/

Dignity

尊厳, 名誉, 自尊
Meaning
the state of being worthy of honor or respect; composure and self-respect
Example
Despite facing hardships, she maintained her dignity throughout the ordeal.
困難に直面しても、彼女は試練を通して尊厳を保ち続けました。
C2 verb /dɪˈskraɪ/

descry

遠くで見る
Meaning
to catch sight of something, especially something distant or obscure
Example
From the hilltop, they descried a small village in the distance.
丘の頂上から、彼らは遠くの小さな村を見た。
C1 adjective /dɪˈsɜːrnəbl/

discernible

明白な
Meaning
able to be seen, recognized, or understood
Example
There was a discernible change in his behavior.
彼の行動には明らかな変化があった。
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。
A2 noun /ˈdɪkʃəˌnɛri/

dictionary

辞書
Meaning
A reference book or electronic resource containing words, usually arranged alphabetically, with information about their meanings, pronunciations, etymologies, and usage.
Example
I looked up the word in the dictionary to understand its meaning.
意味を理解するために辞書でその単語を調べました。
A2 verb /diːl/

deal

幸せ
Meaning
to distribute or give out something; to handle or manage
Example
He had to deal with many problems at work.
彼女は賞を受け取ったとき、幸せを隠すことができませんでした。
C1 noun /ˈded.lɑk/

Dead-lock

行き詰まり; 停滞
Meaning
a situation in which no progress is possible; complete standstill
Example
The negotiations reached a deadlock when neither side would compromise.
交渉は行き詰まりに達し、どちらの側も妥協しようとしませんでした。
B2 noun /dɪsˈmɪsl̩/

dismissal

解雇, 拒否
Meaning
the act of removing someone from their job; the act of treating something as unimportant
Example
His unfair dismissal led to a lawsuit against the company.
彼の不当な解雇は、会社に対する訴訟を引き起こしました。
C2 verb /dɪˈbɪlɪteɪt/

debilitate

弱める
Meaning
to weaken or make someone or something infirm
Example
The long illness debilitated his strength.
長い病気が彼の力を弱めた。
C2 verb /dɒf/

doff

帽子を脱ぐ（敬意の印として）
Meaning
to take off an item of clothing, especially a hat, as a sign of respect
Example
He doffed his hat as the procession passed.
彼は行列が通り過ぎるときに帽子を脱いだ。
B2 adjective /dɪˈpɛndəbl/

dependable

信頼できる
Meaning
able to be trusted or relied on; consistently reliable
Example
She is a dependable colleague who always meets deadlines.
彼女はいつも締め切りを守る信頼できる同僚です。
C2 noun /dɪˈmeɪn/

demesne

邸宅に付属する土地
Meaning
Land attached to a manor and retained for the owner's use.
Example
The castle was surrounded by its vast demesne.
その城は広大な邸宅に付属する土地に囲まれていました。
C2 adjective /dɪˈluːsəri/

delusory

幻想的な
Meaning
Based on illusion; not real.
Example
He was filled with delusory hopes of becoming famous overnight.
彼は一夜にして有名になるという幻想的な希望に満ちていた。
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 /ˈdaɪəˌlɛkt/

dialect

方言
Meaning
A particular form of a language spoken in a specific region or by a specific group.
Example
He speaks a dialect of Bengali that is common in rural areas.
彼は田舎で一般的なベンガル語の方言を話します。
C2 verb /ˌdɪskəˈmoʊd/

discommode

邪魔する
Meaning
To cause inconvenience or trouble to someone.
Example
I hope my request does not discommode you.
私のリクエストがあなたに不便をかけないことを願っています。
B2 adjective /dɪm/

Dim

薄暗い; 少ない光; 弱い
Meaning
not bright; having little light; faint
Example
The room was dim with only a small candle for light.
部屋は薄暗く、ライトとして小さなキャンドルだけがありました。
C2 noun /ˈdʌblɪt/

doublet

ダブレット / タイトジャケット
Meaning
a close-fitting jacket worn by men in the Renaissance; also, a pair of similar things
Example
The actor wore a velvet doublet for the Shakespearean play.
俳優はシェイクスピア劇のためにベルベットのダブレットを着ました。
C2 noun /ˈdʌlərd/

dullard

愚か者
Meaning
a slow or stupid person
Example
He was considered a dullard by his classmates.
彼はクラスメートによって愚か者だと考えられていた。
B1 verb /dɪɡ/

dig

掘る
Meaning
to break up and move earth with a tool or machine, or with hands, paws, etc.
Example
They decided to dig a hole for the new tree.
彼らは新しい木のために穴を掘ることを決めました。
C2 noun /ˈdrɪvəl/

drivel

戯言
Meaning
silly or nonsensical talk
Example
The politician’s speech was full of meaningless drivel.
政治家の演説は意味のない戯言でいっぱいだった。
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.
B2 verb /daɪˈvɜːrt/

divert

Meaning
to turn aside from a course; to redirect or entertain
Example
The police diverted traffic to a side road.
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 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。
C2 adjective /ˈdʌlsɪt/

dulcet

甘美
Meaning
sweet and soothing (often used ironically)
Example
She was enchanted by his dulcet voice.
彼女は彼の甘美な声に魅了されていた。
C2 noun /ˌdaɪəˈlɛktɪk/

dialectic

Meaning
A method of argument or reasoning by dialogue, especially as a means of investigating truth.
Example
The philosopher used dialectic to challenge his students' assumptions.
B2 noun daɪˈlem.ə

dilemma

ジレンマ, 困難な選択
Meaning
A situation in which a difficult choice has to be made between two or more alternatives.
Example
She faced a moral dilemma at work.
彼女は職場で道徳的なジレンマに直面していた。
C2 noun /ˈdɛswɪˌtuːd/

desuetude

廃止
Meaning
a state of disuse or inactivity
Example
The old law has fallen into desuetude.
古い法律は廃止されました。
C2 noun /dɪˈdʒɛnərəsi/

degeneracy

退化
Meaning
The state of decline or deterioration, often in moral, cultural, or physical qualities.
Example
The novel portrays the moral degeneracy of a corrupt society.
その小説は腐敗した社会の道徳的退化を描いています。
B2 adjective /dɪˈbeɪtəbl̩/

debatable

議論の余地がある
Meaning
open to discussion or doubt; not certain
Example
It is debatable whether the policy will work.
その政策が機能するかどうかは議論の余地がある。
A2 noun /dɪˈsɪʒ.ən/

Decision

決定
Meaning
a conclusion or resolution reached after consideration; the action of deciding
Example
Making the right decision required careful analysis of all available options.
正しい決定を下すには、利用可能なすべての選択肢を慎重に分析する必要がありました。