disarm
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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 /ˈdɔːr.mənt/

Dormant

非アクティブ; 眠っている; 一時的に保留された; 現在アクティブではない
Meaning
inactive; sleeping; temporarily suspended; not currently active
Example
The volcano has been dormant for over a century.
火山は1世紀以上の間休眠状態です。
C1 noun /ˈdrʌdʒəri/

drudgery

退屈で骨の折れる仕事
Meaning
Hard, menial, or dull work.
Example
She wanted to escape the drudgery of her daily routine.
彼女は日常の退屈なルーチンから抜け出したかった。
C1 noun /dɪsˈɒn.ər/

Dishonour

不名誉
Meaning
a state of shame or disgrace; lack of honor or integrity; failure to fulfill obligations
Example
Breaking his promise brought dishonour to his name and family legacy.
約束を破ったことが彼の名前と家族の遺産に不名誉をもたらした。
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 verb /dɪˈteɪn/

detain

Meaning
to keep someone from proceeding; to hold back, especially by official authority
Example
The police detained the suspect for questioning.
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 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 verb /dɪsˈsætɪsfaɪ/

dissatisfy

不満にさせる
Meaning
to fail to please or meet expectations; to make someone unhappy
Example
The poor service dissatisfies many customers.
悪いサービスは多くの顧客を不満にさせます。
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 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 /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 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 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 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 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 noun, verb /dɪsˈɑːnər/

dishonor

Meaning
a state of shame or loss of respect; to bring shame upon someone or something
Example
The soldier felt he had brought dishonor to his family.
C1 noun /ˌdɪstɪˈleɪʃən/

distillation

蒸留
Meaning
The process of purifying a liquid by heating and cooling; the extraction of the essential meaning.
Example
Distillation is commonly used to produce alcoholic beverages.
蒸留はアルコール飲料の製造によく使用されます。
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 /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 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 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 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 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 adjective /dɪˈspɪkəbl/

despicable

卑劣な
Meaning
Deserving hatred and contempt; vile or shameful.
Example
His despicable actions shocked the entire community.
彼の卑劣な行動はコミュニティ全体を驚かせました。
C1 noun /dɪˈfen.dənt/

Defendant

被告
Meaning
an individual, company, or institution sued or accused in a court of law
Example
The defendant pleaded not guilty to all charges brought against him.
被告は、彼に対するすべての告発に対して無罪を主張しました。
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 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 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 noun /ˈdaɪnəˌmoʊ/

dynamo

電気を発生させる機械; 大きなエネルギーと熱意を持つ人物
Meaning
A machine that generates electricity; a person with great energy and enthusiasm.
Example
She is the real dynamo behind the success of the company.
彼女は会社の成功の背後にある本物のダイナモです。
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 /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 /dɪsˈsɜːrvɪs/

disservice

害
Meaning
A harmful action; something that does damage rather than help.
Example
Spreading false information is a disservice to the community.
偽の情報を広めることは、コミュニティに害を与えることです。
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。
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 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 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 /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 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 /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。
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 adjective /dɪsˈsɪmɪlər/

dissimilar

異なる
Meaning
Not alike; different.
Example
Though they are twins, their personalities are dissimilar.
彼らは双子だが、性格は異なる。
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 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 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 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 /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 noun /ˌdɛrɪˈveɪʃən/

derivation

派生
Meaning
The origin or development of something from a source.
Example
The derivation of the word comes from Latin.
その単語の起源はラテン語から来ている。
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 /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 noun /ˈdɛspətɪzəm/

despotism

専制政治
Meaning
absolute power exercised in a cruel and oppressive way
Example
The people revolted against the era of despotism.
人々は専制政治の時代に反乱を起こしました。
C1 noun /diːˈkrɪp.ʃən/

decryption

復号
Meaning
The process of converting encrypted data back into its original form so it can be understood.
Example
Hackers attempted decryption of classified data.
ハッカーは分類されたデータの復号を試みました。
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 phrase ˌdɪp.ləˈmæt.ɪk rɛz.əˈluː.ʃən

diplomatic resolution

外交的解決
Meaning
A peaceful solution to conflicts through negotiation and diplomatic channels.
Example
A diplomatic resolution is necessary for peace.
平和には外交的解決が必要です。
C1 noun /ˌdɛsɪˈmeɪʃən/

decimation

壊滅
Meaning
The act of destroying or killing a large proportion of something.
Example
The decimation of the city left thousands homeless.
都市の壊滅により、何千人もの人々が家を失った。
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 /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/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 /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 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。
C1 adjective /dɪˈskrɪmɪˌneɪtɪŋ/

discriminating

選り好みする
Meaning
Having refined taste or good judgment; able to recognize subtle differences.
Example
She is known for her discriminating taste in art.
彼女は芸術における選り好みの味で知られています。
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 verb /ˈdɪs.ɪ.peɪt/

dissipate

徐々に消失する
Meaning
To disappear or cause to disappear gradually.
Example
The tension in the room slowly dissipated.
部屋の中の緊張感は徐々に消えていった。
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 adjective /ˈdɒɡɪd/

dogged

執拗
Meaning
showing stubborn determination and persistence
Example
She succeeded through dogged determination.
彼女は執拗な決意で成功を収めました。
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 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。
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 dɪsˈfʌŋkʃənl

dysfunctional

機能不全の
Meaning
Not operating normally or properly.
Example
The dysfunctional system led to numerous delays and errors.
機能不全のシステムは多くの遅延とエラーを引き起こしました。
C1 adjective /ˌdɪktəˈtɔːriəl/

dictatorial

独裁的
Meaning
Having or showing a tendency to tell people what to do in an autocratic way.
Example
His dictatorial style made him unpopular among colleagues.
彼の独裁的なスタイルは、同僚たちの間で不人気だった。
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 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 adjective /dɪˈɡreɪdɪd/

degraded

劣化した
Meaning
Reduced in quality, dignity, or condition.
Example
The villagers were forced to live in degraded conditions.
村人たちは劣化した状態で暮らさざるを得なかった。
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 verb diːˈsɛn.sɪ.taɪz

desensitize

脱感作
Meaning
To make someone less sensitive or reactive to something through repeated exposure.
Example
Constant exposure to violence can desensitize people.
継続的な暴力の露出は人々を鈍感にする可能性があります。
C1 verb /daɪˈvɛst/

divest

Meaning
to strip away possessions, rights, or assets; to rid oneself of
Example
The company decided to divest its unprofitable division.
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 /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 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 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 /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 /dɪsˈfɪɡjər/

disfigure

変形させる
Meaning
to spoil or damage the appearance of something
Example
The fire disfigured the old building.
火事は古い建物を変形させた。
C1 adjective /dɪˈrɒɡətɔːri/

derogatory

侮辱的
Meaning
Showing a critical or disrespectful attitude.
Example
The article contained derogatory comments about the politician.
その記事には政治家について侮辱的なコメントが含まれていました。
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 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 /ˈdrɪəri/

dreary

陰気な / 退屈な
Meaning
dull, bleak, and lifeless; depressing
Example
The long, dreary winter made everyone feel gloomy.
長くて退屈な冬は、皆を憂鬱にさせた。
C1 verb dɪˈsɜːn

discern

識別する
Meaning
To perceive or recognize something; to distinguish with difficulty by sight or with the other senses.
Example
He could barely discern the distant figure in the fog.
彼は霧の中で遠くの姿をほとんど識別できなかった。
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 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 ˈdɛtrɪ.mənt

detriment

損害、害、障害
Meaning
Harm, damage, impairment.
Example
Smoking is a detriment to health.
喫煙は健康に対するデトリメントです。
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 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 /druːp/

droop

垂れる
Meaning
to bend or hang downward; to become weak or tired
Example
The flowers began to droop in the heat.
花は暑さで垂れ始めました。
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 /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 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 /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 /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 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 noun /dɪˈsaɪ.pəl/

Disciple

弟子; 信者
Meaning
a follower and student of a teacher, leader, or philosopher; devoted follower
Example
The famous philosopher had many disciples who spread his teachings worldwide.
その有名な哲学者には多くの弟子がいて、彼の教えを世界中に広めました。
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 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 /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 /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 noun /ˈdɛməɡɒɡ/

demagogue

デマゴーグ
Meaning
A political leader who seeks support by appealing to popular desires and prejudices rather than by using rational argument.
Example
The crowd was swayed by the fiery speeches of the demagogue.
群衆はデマゴーグの情熱的な演説に影響された。
C1 verb /dɪˈfaɪl/

defile

汚す
Meaning
to pollute, corrupt, or make dirty
Example
The river was defiled by industrial waste.
川は工業廃水によって汚された。
C1 noun ˈdɪskɔrd

discord

不和
Meaning
Disagreement or conflict between people or ideas.
Example
Discord among people disrupts societal stability.
人々の間の不和は社会の安定を乱す。
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 adjective daɪˈvɜː.dʒənt

divergent

異なる
Meaning
Tending to be different or develop in different directions
Example
Divergent policies create challenges in collaboration.
異なる政策は協力に挑戦を生み出します。
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 verb ˈdiː.vi.eɪt

deviate

逸脱する
Meaning
To depart from an established course or normal pattern.
Example
He tends to deviate from the original plan.
彼は元の計画から外れる傾向がある。
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 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 /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 /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 /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 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 /dɪˈfɔː.mə.ti/

Deformity

変形; 身体的欠陥
Meaning
a distorted or unnatural shape or form; physical malformation
Example
The accident caused a permanent deformity in his left hand.
事故は彼の左手に永続的な変形を引き起こしました。
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。
C1 verb /dɪˈmiːn/

demean

侮辱する
Meaning
to cause someone to lose dignity or respect
Example
The manager demeaned his employees with rude remarks.
マネージャーは粗野なコメントで社員を侮辱しました。