perpetuity
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C2 noun ˌpɜː.pɪˈtʃuː.ɪ.ti

perpetuity

永続性、永遠、継続性
Meaning
Permanence, eternity, continuity.
Example
The contract ensures payments in perpetuity.
契約は永続的な支払いを保証します。
C2 adjective /ʌnəˈpiːzd/

unappeased

満足していない
Meaning
Not satisfied or calmed; still feeling discontent or anger
Example
Despite the apology, she remained unappeased.
謝罪にもかかわらず、彼女は満足していなかった。
C1 adjective /ʌnˈvaɪəbl/

unviable

実現不可能
Meaning
Not capable of working successfully; not feasible or practical.
Example
The project was deemed unviable due to high costs.
高額なコストのため、このプロジェクトは実現不可能と見なされました。
C1 noun /ˈtʃʌk.əl/

Chuckle

軽い笑い
Meaning
a quiet or suppressed laugh; to laugh quietly or with amusement
Example
He gave a soft chuckle when he heard the funny joke.
彼は面白いジョークを聞いて軽くクスクス笑った。
B2 verb /ˈrendər/

render

提供する
Meaning
to provide or give; to make or cause to become
Example
The artist renders the scene beautifully.
アーティストはシーンを美しく表現します。
A2 noun/verb /ˈsaɪkl/

cycle

サイクル / 自転車
Meaning
a series of events that repeat in the same order; or to ride a bicycle
Example
She cycles to school every day.
彼女は毎日自転車で学校に行きます。
B2 verb /ˌriː.kənˈsɪd.ər/

reconsider

再考する
Meaning
to think about something again, especially to change a decision or opinion
Example
She decided to reconsider her decision about moving abroad.
彼女は海外に引っ越すという決断を再考することに決めました。
B2 verb /kənˈvɜːs/

converse

会話する
Meaning
to have a conversation; to talk together
Example
They conversed about literature for hours.
彼らは何時間も文学について話し合った。
A1 pronoun /ɪt/

it

それ
Meaning
used to refer to a thing, animal, or idea previously mentioned or easily identified
Example
It is raining outside.
外では雨が降っています。
B1 verb /trænsˈleɪt/

translate

翻訳する
Meaning
to express words or text in another language
Example
She can translate five languages.
彼女は五カ国語を翻訳できます。
C1 adjective /kəˈnɒnɪkəl/

canonical

カノニカル / 受け入れられた
Meaning
Conforming to a general rule or accepted standard; officially recognized.
Example
Shakespeare’s works are considered canonical in English literature.
シェイクスピアの作品は英文学においてカノニカルと見なされています。
A2 noun /ˈtiːtʃɪŋ/

teaching

教育
Meaning
the profession or practice of teaching
Example
Teaching is a noble profession.
教育は崇高な職業です。
C1 noun/verb /ˈbɔɪ/ or /ˈbuːi/

buoy

ブイ, 浮かべる
Meaning
A floating marker on water; to keep something afloat or encourage someone.
Example
The news buoyed their spirits after the loss.
ニュースは喪失後、彼らの気持ちを高めました。
B2 noun /θɔːn/

Thorn

とげ
Meaning
a sharp pointed part of a plant; something that causes pain or annoyance
Example
Be careful of the thorns on the rose bush.
バラの茂みの中のとげに気をつけてください。
A2 verb /ˌrɛkəˈmɛnd/

recommend

勧める
Meaning
to suggest or advise something as being good or suitable
Example
I recommend trying the new restaurant downtown.
私はダウンタウンの新しいレストランを試すことをリコメンドします。
C1 adjective /ˈrɛzənənt/

resonant

響く
Meaning
Deep, clear, and continuing to sound or echo.
Example
The resonant voice of the speaker filled the hall.
スピーカーの響く声がホールに響き渡った。
B2 noun /ˌklærɪfɪˈkeɪʃən/

clarification

明確化
Meaning
The action of making a statement or situation less confused and more clearly comprehensible.
Example
The manager requested clarification on the project details.
マネージャーはプロジェクトの詳細に関する明確化を求めました。
C2 adjective /ˈlɪɡ.ni.əs/

ligneous

木質の
Meaning
having the texture or appearance of wood; woody
Example
The ligneous stem supported the heavy flowers.
木質の茎が重い花を支えました。
B1 verb /ˈɒnər/

honour

敬う
Meaning
to show respect; to keep a promise
Example
We honour our veterans for their service.
私たちは退役軍人をその奉仕のために敬意を表します。
C2 adjective /ˈɪm.pi.əs/

Impious

不敬な; 冒涜的
Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
不敬な行為は宗教コミュニティを驚かせました。
C1 verb /ˈsʌkɪŋ/

sucking

吸う
Meaning
Drawing in a liquid, air, or other substance through the mouth or a tube by creating a vacuum; also used figuratively for something unpleasant or ineffective
Example
The baby is sucking on a pacifier.
赤ちゃんが乳首を吸っています。
B2 adjective /ˌmæθəˈmætɪkəl/

mathematical

数学的
Meaning
relating to mathematics or the use of mathematics
Example
The mathematical equation was difficult to solve.
その数学的な方程式は解くのが難しかった。
C2 adjective /ˈtɔːrʃəs/

tortious

不法行為
Meaning
Relating to or involving a wrongful act leading to legal liability.
Example
The company was found guilty of tortious interference with contracts.
その企業は契約への不法干渉で有罪判決を受けた。
B2 verb /əˈpɔɪnt/

appoint

任命する
Meaning
to choose someone for a job or position
Example
The board will appoint a new director.
ボードは新しいディレクターを任命します。
C1 adjective /ˌsʌbˈkɒn.ʃəs/

subconscious

潜在意識
Meaning
Of or concerning the part of the mind which one is not fully aware of but which influences actions and feelings.
Example
Fears often come from the subconscious mind.
恐怖はしばしば潜在意識から生まれます。
C2 adjective /rɪˈfræktəri/

refractory

反抗的
Meaning
Stubborn or resistant to control, authority, or treatment.
Example
The refractory child refused to follow the teacher's instructions.
反抗的な子供は教師の指示に従うのを拒否した。
B2 noun, adjective /tɑːrt/

tart

Meaning
A small pie with a sweet or savory filling; or having a sharp, sour taste.
Example
She served a delicious apple tart for dessert.
C2 noun /mʌsk/

Musk

ムスク
Meaning
a strong-smelling substance secreted by certain animals, used in perfumes and traditional medicine
Example
The perfume contained natural musk that gave it an exotic fragrance.
その香水には天然のムスクが含まれており、エキゾチックな香りを与えました。
C2 noun /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

予知
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
預言者はその出来事の予知をしていると主張した。
A2 noun /ˈtrævələr/

traveler

旅行者
Meaning
a person who is traveling or who often travels
Example
The traveler rested at a small inn after a long journey.
旅行者は長い旅の後、小さな宿屋で休憩しました。
C1 verb, noun /ɡɔːrdʒ/

gorge

貪欲に食べる / 山間の狭い谷
Meaning
to eat greedily; a narrow valley between mountains or hills
Example
They gorged themselves on pizza after the hike.
ハイキング後に彼らはピザをむさぼり食べました。
C1 noun /ˈlɔː.meɪ.kər/

Lawmaker

立法者
Meaning
a person who writes and passes laws, especially a member of a legislative body
Example
The lawmakers voted on the new education bill.
立法者たちは新しい教育法案に投票しました。
C2 adjective /prəˈvaɪzəri/

provisory

仮の
Meaning
conditional; depending on certain terms being met
Example
The arrangement was only provisory until the final contract was signed.
その取り決めは、最終契約が署名されるまで仮のものでした。
C1 verb /rɪˈpiːl/

repeal

Meaning
To officially cancel or revoke a law or decision.
Example
The government decided to repeal the outdated law.
B2 adjective /ˈɡrʌm.pi/

Grumpy

不機嫌な; イライラした;
Meaning
bad-tempered and irritable; easily annoyed
Example
He was grumpy all morning because he didn't sleep well.
彼は朝からずっと不機嫌でした、よく眠れなかったからです。
C2 noun /ˈɑːrtləsnəs/

artlessness

素朴さ, 自然さ
Meaning
The quality of being natural and simple without deceit or pretension.
Example
Her artlessness made her beloved by all.
彼女のartlessnessは、彼女をみんなに愛される存在にした。
C1 adjective /rɪˈtæl.i.ə.tɔːr.i/

retaliatory

報復的
Meaning
Taking action in response to another's action, characterized as punitive, revengeful, or counteractive.
Example
The country imposed retaliatory tariffs in response to trade sanctions.
その国は貿易制裁に対して報復的な関税を課しました。
A2 noun /ˈprɛzɪdənt/

president

大統領
Meaning
the elected head of a republican state
Example
The president addressed the nation last night.
大統領は昨晩、国民に向けて演説を行いました。
A1 noun /ɡɜːrl/

girl

女の子
Meaning
a female child or young woman
Example
The girl was playing with her friends in the park.
その女の子は公園で友達と遊んでいました。
C1 noun /sɛˈseɪʃən/

cessation

停止
Meaning
The fact or process of ending or being brought to an end.
Example
There was a temporary cessation of hostilities.
敵対行為は一時的に停止しました。
A2 noun /ɪmˈplɔɪər/

employer

雇用者
Meaning
A person or organization that hires and pays people to work.
Example
The employer promised better benefits to attract skilled workers.
雇用者は熟練した労働者を引き付けるために、より良い福利厚生を約束しました。
C2 noun /brɪˈtæniə/

britannia

ブリタニア
Meaning
the personification of Britain, often shown as a woman with a helmet and shield
Example
Britannia has been a symbol of Britain since Roman times.
ブリタニアはローマ時代からイギリスの象徴です。
C2 noun /ˈmoʊlə ˈkɑrplɪt/

Mola carplet

モラ魚
Meaning
a small freshwater fish of the carp family, commonly found in South Asian rivers and ponds
Example
The mola carplet is a popular small fish used in Bengali cuisine.
モラ魚はベンガル料理でよく使われる人気の小さな魚です。
C2 adjective /ˈlæŋɡwɪd/

Languid

無気力な; 怠け者の; 弱い
Meaning
lacking energy or vitality; slow and relaxed; weak or faint
Example
After the long journey, she felt languid and needed to rest.
長い旅の後、彼女は無気力に感じ、休む必要があった。
C2 adjective /baɪˈkæmərəl/

bicameral

二院制
Meaning
Having two branches or chambers, especially in a legislature.
Example
The United States has a bicameral legislature consisting of the Senate and the House of Representatives.
アメリカ合衆国には上院と下院から成る二院制の立法機関があります。
B2 noun /ˈɔːkʃən/

Auction

オークション
Meaning
a public sale in which goods or property are sold to the highest bidder
Example
The antique furniture was sold at an auction last weekend.
アンティーク家具は先週末のオークションで売られました。
B2 noun ˈʃɔːtkʌmɪŋz

shortcomings

欠点
Meaning
A fault or failure to meet a certain standard; deficiencies.
Example
Institutional shortcomings affect student behavior negatively.
制度的な欠点は学生の行動に悪影響を与える。
C1 noun /ˈzɛnəˌfoʊb/

xenophobe

外国人恐怖症者
Meaning
a person who dislikes or fears people from other countries or cultures
Example
The politician was criticized as a xenophobe due to his anti-immigrant policies.
その政治家は反移民政策のため、外国人恐怖症者として批判されました。
C2 verb /ˈɒsɪfaɪ/

ossify

骨化する
Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
年を重ねると、一部の組織が骨化する傾向があります。
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 /ˌɪm.ɪˈteɪ.ʃən/

Imitation

模倣; コピー; レプリカ
Meaning
the action of using someone or something as a model; a copy of something original
Example
His imitation of the famous actor was so good that everyone burst into laughter.
彼の有名な俳優のイミテーションはとても上手で、みんなが笑い出しました。
C1 noun /nɒb/

Knob

ドアや引き出しの丸い取っ手; 機械の小さな丸いスイッチ
Meaning
a rounded handle on a door or drawer; a small rounded switch on a machine
Example
He turned the brass knob to open the old wooden door.
彼は古い木の扉を開けるために真鍮のノブを回した。
C1 verb /per/

pare

皮をむく
Meaning
to cut away the outer covering or reduce something gradually
Example
She pared the apple before eating it.
彼女はリンゴを食べる前に皮をむいた。
B2 noun /ˈpɪk.səl/

pixel

デジタル画像またはディスプレイの最小単位
Meaning
the smallest unit of a digital image or display
Example
The image is blurry because some pixels are missing.
画像がぼやけているのは、いくつかのピクセルが欠けているからです。
C2 noun /ˈmɒnəkl/

monocle

Meaning
A single round lens for one eye, used to correct or enhance vision.
Example
The old gentleman wore a monocle at formal events.
B2 verb /blɛnd/

blend

混ぜる
Meaning
to mix things together smoothly; to combine harmoniously
Example
She blends the ingredients carefully.
彼女は慎重に材料を混ぜます。
B1 verb /rɪˈflekt/

reflect

反映する
Meaning
to think deeply about; to mirror back light or image
Example
The mirror reflects her beautiful face.
鏡は彼女の美しい顔を反映しています。
C1 noun /krʌst/

crust

外皮
Meaning
the hard outer surface of something, especially bread or the Earth's outer layer
Example
He cut off the crust of the bread before eating.
彼は食べる前にパンの外皮を切り取った。
A2 noun /tent/

Tent

テント
Meaning
a portable shelter made of cloth or canvas; military accommodation
Example
The soldiers set up their tent in the military camp.
兵士たちは軍のキャンプでテントを設置した。
B2 noun prəˈtæɡənɪst

protagonist

主人公
Meaning
The leading character or one of the major characters in a drama, movie, novel, or other fictional text.
Example
Charles Darnay is one of the protagonists of the story.
チャールズ・ダーネイは物語の主要な登場人物の一人です。
A2 noun /ˈsɪŋ.ər/

Singer

歌手
Meaning
a person who sings, especially as a job or profession
Example
The singer performed beautifully at the concert last night.
そのシンガーは昨晩のコンサートで素晴らしいパフォーマンスをしました。
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。
B2 noun trænˈzɪʃ.ən

transition

移行
Meaning
The process or a period of changing from one state or condition to another.
Example
The transition from fossil fuels to renewables is vital.
化石燃料から再生可能エネルギーへの移行は重要です。
C2 verb /ɪˈluːmɪn/

illumine

照らす
Meaning
to light up or make clear
Example
The rising sun illumined the mountain peaks.
昇る太陽が山頂を照らした。
B2 adjective /ˈvaɪəbəl/

viable

実行可能, 実現可能
Meaning
Capable of working successfully; feasible.
Example
A viable solution is necessary for long-term success.
長期的な成功には実行可能な解決策が必要です。
A2 verb /ɪnˈkluːd/

include

含む
Meaning
to have as part of a whole; to contain or comprise
Example
The price includes all taxes.
価格にはすべての税金が含まれています。
B2 verb /ɪmˈbɑːrkɪŋ/

embarking

旅行を始める
Meaning
Beginning a journey or enterprise.
Example
The group is embarking on a long journey.
グループは長い旅行を始めるところです。
B2 noun /pɔːrtʃ/

porch

ポーチ
Meaning
a covered area at the entrance of a building, often with a roof and open sides
Example
We sat on the porch and enjoyed the evening breeze.
私たちはポーチに座って、夕方の風を楽しみました。
C1 noun/verb /rɪˈpriːz/

reprise

繰り返し
Meaning
A repetition or return to an earlier theme, role, or action.
Example
The actor reprised his role in the sequel.
俳優は続編で自分の役を再演しました。
B1 noun /ˈhʌntər/

hunter

ハンター
Meaning
a person or animal that hunts animals for food or sport
Example
The hunter tracked the deer through the forest.
ハンターは森を通って鹿を追跡しました。
B2 noun /əˈkʌmplɪʃmənt/

accomplishment

達成
Meaning
something that has been achieved successfully
Example
Graduating from university was a major accomplishment for him.
大学を卒業することは彼にとって大きな達成でした。
C2 verb /kənˈsɪlieɪt/

conciliate

Meaning
to stop someone from being angry; to win over by friendly acts
Example
He tried to conciliate the angry customer with an apology.
B1 adverb /ˈfɜːrstli/

firstly

まず
Meaning
used to introduce the first point or reason in a discussion or argument
Example
Firstly, we need to address the budget issue before proceeding.
まず、予算の問題に対処する必要があります。
C1 adjective,noun /kənˈtɪn.dʒənt/

contingent

依存する / 代表団
Meaning
dependent on something else; a group of people representing an organization
Example
Attendance is contingent on prior registration. / A contingent of students attended the conference.
出席は事前登録に依存しています。 / 学生の代表団が会議に出席しました。
B1 noun /kruː/

crew

乗組員
Meaning
A group of people working together, especially on a ship, aircraft, or project.
Example
The ship's crew worked tirelessly during the storm.
船のクルーは嵐の間、休むことなく働いた。
A1 adjective /ˈfeɪ.məs/

famous

有名
Meaning
Known about by many people; renowned.
Example
This area is famous for its unique heritage.
この地域はそのユニークな遺産で有名です。
B2 adjective ˈræd.ɪ.kəl

radical

伝統的な信念やシステムに反する根本的な変化をもたらす能力がある
Meaning
Capable of bringing fundamental changes opposite to conventional beliefs or systems.
Example
The leader proposed radical economic reforms.
リーダーはラディカルな経済改革を提案しました。
C2 noun lɑːˈʒɛs

largesse

寛大さ
Meaning
Generosity in bestowing money or gifts upon others.
Example
His largesse towards the charity was greatly appreciated.
彼のチャリティーへの寛大さは大いに評価されました。
A2 adjective /ˈkraʊdɪd/

crowded

幸せ
Meaning
filled with too many people or things
Example
The bus was so crowded that I could hardly move.
彼女は賞を受け取ったとき、自分の幸せを隠すことができなかった。
C2 noun /ˈbrɛviˌɛri/

breviary

祈祷書
Meaning
A book containing the service for each day, used in Christian liturgy.
Example
The monk read from the breviary during morning prayers.
修道士は朝の祈りの間に祈祷書から読んでいました。
B2 noun ˈdʒes.tʃərz

gestures

ジェスチャー
Meaning
Body movements, especially of hands, face, or body when speaking.
Example
Effective gestures add emphasis to a speech.
効果的なジェスチャーはスピーチに強調を加えます。
A2 verb /prəˈvaɪd/

provide

提供する
Meaning
to give or supply something that is needed or wanted
Example
The teacher will provide extra materials for the students.
教師は学生に追加の資料を提供するでしょう。
C1 adjective /ˌzɛnəˈfoʊbɪk/

xenophobic

外国人恐怖症
Meaning
having or showing a dislike or fear of people from other countries
Example
The leader’s xenophobic comments sparked outrage across the country.
リーダーの外国人恐怖症に関するコメントは、全国で憤りを引き起こした。
A1 adjective strɒŋ

strong

強い
Meaning
Having the power to move heavy weights or perform other physically demanding tasks.
Example
A strong defense secures victory.
強い防御は勝利を確実にする。
C1 adjective /ˈniːd.ləs/

Needless

不必要な
Meaning
unnecessary; not required; without purpose
Example
The argument was needless and could have been avoided.
その議論は不必要で、避けることができたはずだ。
B2 noun /ˌvɪz.ɪˈbɪlɪti/

visibility

可視性
Meaning
The state of being able to see or be seen; exposure or prominence.
Example
Increased visibility on social media can help businesses grow.
ソーシャルメディアでの可視性の向上は、ビジネスの成長に役立ちます。
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。
B1 noun /prəˌnʌnsiˈeɪʃən/

pronunciation

発音
Meaning
the way a word or language is spoken; the act or result of pronouncing words
Example
Her pronunciation of French words has improved significantly.
彼女のフランス語の単語の発音は大きく向上した。
C1 adjective /ˈskɪtɪʃ/

skittish

神経質な
Meaning
easily frightened or nervous; unpredictable
Example
The horse was too skittish to ride.
その馬は乗るには神経質すぎた。
C1 adjective /ˈflæʃi/

flashy

派手な, 目立つ
Meaning
ostentatious or showy in a way that attracts attention
Example
He drove a flashy sports car through the city streets.
彼は市街地を派手なスポーツカーで走った。
B1 noun /ˈnaɪt.meər/

Nightmare

悪夢
Meaning
a frightening or unpleasant dream; a very unpleasant experience
Example
The exam was a complete nightmare for unprepared students.
試験は準備不足の学生にとって完全な悪夢でした。
C2 noun /liːən/

lien

留置権
Meaning
A legal right to keep possession of property until a debt is paid.
Example
The bank placed a lien on the house until the mortgage was cleared.
銀行は住宅にリース権を設定しました、住宅ローンが清算されるまで。
C1 adjective /ʌnˈsɪvəlaɪzd/

Uncivilized

未開の; 野蛮な;
Meaning
not developed in terms of civilization; lacking social organization and culture; barbarous
Example
The explorers encountered an uncivilized tribe deep in the Amazon rainforest.
探検家たちはアマゾンの雨林の奥深くで未開の部族に出会った。
C2 noun /əˈmɛrɪkəˌnɪzəm/

americanism

Meaning
A word, phrase, or practice characteristic of American English or culture.
Example
The term 'sidewalk' is an Americanism, while 'pavement' is used in British English.
B1 noun /ɪkˈspens/

Expense

費用; 支出;
Meaning
the cost required for something; money spent on something
Example
The travel expense for the business trip was covered by the company.
出張費用は会社が負担しました。
C2 noun əˈdrɔɪt.nəs

adroitness

巧みさ
Meaning
Cleverness or skill, especially in using the hands or mind; skillful dexterity.
Example
His adroitness in negotiations secured the deal.
彼の交渉での巧みさが契約を成立させた。
C1 noun prəˈpɛn.sə.ti

propensity

傾向または自然な傾向
Meaning
An inclination or natural tendency to behave in a particular way.
Example
He has a propensity for taking risks in business.
彼はビジネスでリスクを取る傾向がある。
C2 adjective /ˌsuːdəˈrɪfɪk/

sudorific

発汗促進剤
Meaning
causing or increasing sweating
Example
The doctor prescribed a sudorific drug to help reduce the fever.
医者は発熱を下げるために発汗を促進する薬を処方しました。
C1 adjective /əˌpɒk.əˈlɪp.tɪk/

apocalyptic

終末的
Meaning
Describing the end of the world, or something catastrophic and disastrous.
Example
The movie depicts an apocalyptic future after a nuclear war.
映画は核戦争後の終末的な未来を描いています。
A2 adverb /ˈnoʊwɛr/

Nowhere

どこにも
Meaning
not anywhere; in no place
Example
I searched everywhere but the keys were nowhere to be found.
私はあらゆる場所を探しましたが、鍵はどこにも見つかりませんでした。
A2 adjective /ˈsʌðərn/

southern

南の
Meaning
located in or facing the south; southern regions
Example
She moved to a southern city for work.
彼女は仕事のために南の都市に引っ越した。
C1 verb koʊˈɜrs

coerce

強制する
Meaning
To force someone to do something against their will using threats or intimidation.
Example
The manager tried to coerce the employees into working overtime.
マネージャーは従業員を強制的に残業させようとしました。
C1 noun /ˈhɑː.mɪdʒ/

Homage

敬意; 尊敬; 追悼
Meaning
special honor or respect shown publicly; tribute paid to someone in recognition of their merit
Example
The memorial service was a touching homage to the brave soldiers who sacrificed their lives.
追悼式は、命を捧げた勇敢な兵士たちへの感動的な敬意でした。
C2 noun /ˈɛərəˌstæt/

aerostat

エアロスタット
Meaning
A lighter-than-air craft, such as a balloon, that is lifted by gas.
Example
The military used an aerostat for surveillance over the border.
軍隊は国境監視のためにエアロスタットを使用しました。
C1 noun /ɔːˈtɒmətən/

automaton

自動機械
Meaning
A machine that works automatically; also refers to a person who behaves like a machine, without thinking.
Example
He worked like an automaton, without showing any emotion.
彼は感情を見せずにオートマトンのように働いていました。
C1 noun /ˈɡæmbɪt/

gambit

ギャンビット
Meaning
a calculated move or remark intended to gain an advantage, especially in chess or conversation
Example
His opening gambit in the debate caught everyone by surprise.
彼の討論でのギャンビットは、みんなを驚かせました。
B2 verb /bɪˈfrɛnd/

befriend

友達になる
Meaning
to act as a friend to someone; to make friends with
Example
She befriended the new student at school.
彼女は学校で新しい生徒と友達になった。
B2 noun ˈtreɪd.ɒf

trade-off

トレードオフ
Meaning
A situation where accepting one advantage means giving up another benefit.
Example
There is always a trade-off between price and quality.
価格と品質の間には常にトレードオフがあります。
C1 noun ˌvɜː.səˈtɪl.ɪ.ti

versatility

多才
Meaning
Ability to adapt or be adapted to many different functions or activities; having many different skills.
Example
His versatility made him successful in multiple fields.
彼の多才さは、複数の分野で彼を成功させました。
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。
C1 adjective /ˈnjuː.ɑːnst/

nuanced

微妙な
Meaning
Characterized by subtle shades of meaning or expression; having fine gradations of meaning, tone, or feeling.
Example
His analysis of the novel was highly nuanced.
彼の小説の分析は非常に微妙でした。
C2 verb /ˈtæri/

tarry

遅れる
Meaning
To delay or linger; to stay longer than intended.
Example
Do not tarry, or you will miss the train.
遅れないで、さもないと電車に乗り遅れるよ。
C2 adjective /ɪnˈdɛkərəs/

indecorous

不作法
Meaning
Not in keeping with good taste and propriety; improper.
Example
His indecorous behavior shocked the audience.
彼の不作法な振る舞いは観客を驚かせた。
C1 noun ˈrɔɪəl ˈbɛŋɡəl ˈtaɪɡər

Royal Bengal Tiger

ロイヤルベンガルタイガー
Meaning
A subspecies of tiger found primarily in India and Bangladesh, known for its distinctive orange coat with black stripes.
Example
The Royal Bengal Tiger is an iconic species of the Sundarbans.
ロイヤルベンガルタイガーはスンダルバンスの象徴的な種です。
B2 noun /ˈbænər/

banner

Meaning
a large printed sign used for advertisements or announcements
Example
The company displayed a banner to advertise their new product.
C1 adverb /əˈlɜːrtli/

alertly

注意深く
Meaning
in a watchful, attentive, and quick-to-notice manner
Example
She listened alertly to every sound in the dark forest.
彼女は暗い森であらゆる音を注意深く聞いていた。
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

過少に請求する
Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
店主は私に食料品を過少に請求しました。
C1 noun /ˈrɒndɪvuː/

rendezvous

会合
Meaning
a meeting or appointment at an agreed time and place
Example
They arranged a secret rendezvous at the café.
彼らはカフェで秘密の会合を手配しました。
C1 adjective /ˈdjuːtɪfəl/

Dutiful

義務感のある; 尊敬すべき; 従順な
Meaning
conscientiously fulfilling one's duty; obedient; respectful
Example
She is a dutiful daughter who always helps her parents.
彼女はいつも両親を助ける義務感のある娘です。
C2 noun /ˈrɪp.lɪt/

ripplet

小さな波
Meaning
a small or tiny ripple
Example
Tiny ripplets appeared on the lake as the fish moved.
魚が動くと湖に小さな波が現れました。
C2 noun /ˈɛpɪˌsaɪkl/

epicycle

外周上の小円
Meaning
a small circle whose center moves around the circumference of a larger one, used in ancient astronomy
Example
The concept of the epicycle was used to explain planetary motion.
エピサイクルの概念は惑星の運動を説明するために使用されました。