teetotalism
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C2 noun /tiːˈtoʊtəlɪzəm/

teetotalism

アルコール完全断絶主義
Meaning
the practice or principle of abstaining completely from alcoholic drinks
Example
He practiced teetotalism throughout his life.
彼は一生涯ティートタリズムを実践した。
C2 noun ট্রোপোস্ফিয়ার

troposphere

対流圏
Meaning
The lowest layer of Earth's atmosphere where weather phenomena occur.
Example
The troposphere is where weather phenomena occur.
対流圏は天候現象が発生する場所です。
C2 adjective /ˌmɛtəˈfɪzɪkəl/

metaphysical

形而上学的
Meaning
Relating to the branch of philosophy that deals with the fundamental nature of reality and existence.
Example
He spent years studying metaphysical questions about life and being.
彼は人生と存在に関する形而上学的な問題を何年も研究しました。
C2 noun /ˌɪnkrʌˈsteɪʃən/

incrustation

硬化層
Meaning
a crust or hard coating formed on the surface of something
Example
The old pipes were blocked due to heavy incrustation of minerals.
古いパイプは鉱物の重い硬化層によって詰まっていました。
C2 adjective /ˌæk.si.əˈmæt.ɪk/

axiomatic

自明の，証明の必要のない明らかな真実
Meaning
Self-evident, obviously true without need for proof
Example
It is axiomatic that hard work leads to success.
一生懸命働くことは自明であり、成功につながります。
C2 noun /ˈkɔːfər/

coffer

金庫
Meaning
A strongbox or small chest for holding valuables, often used metaphorically for funds or financial reserves.
Example
The city's coffers were drained after the costly project.
高額なプロジェクトの後、都市の金庫は空になりました。
C2 verb /bɪˈdɔːb/

bedaub

塗る
Meaning
to smear or cover with a sticky or dirty substance
Example
The children bedaubed the wall with paint.
子供たちは壁にペンキを塗った。
C2 verb /ˈlaɪ.ə.naɪz/

lionize

賛美する
Meaning
to treat someone as a celebrity or give a lot of public attention
Example
The press began to lionize the young scientist after his discovery.
彼の発見の後、メディアは若い科学者をライオナイズし始めました。
C2 adjective /pərˈsɪpiənt/

percipient

鋭い洞察力を持つ
Meaning
Having good understanding or insight; able to perceive things clearly.
Example
As a percipient critic, she recognized the deeper meaning of the play.
鋭い洞察力を持つ批評家として、彼女は劇の深い意味を認識しました。
C2 noun /ˈboʊsən/

boatswain

船員長
Meaning
a ship's officer in charge of equipment and the crew
Example
The boatswain supervised the sailors on deck.
ボーツウェインはデッキで船員を監督しました。
C2 noun /ˌɡæskəˈneɪd/

gasconade

誇張, 自慢
Meaning
Extravagant boasting or bragging.
Example
His endless gasconade made him unpopular among his peers.
彼の終わりのない自慢は彼を仲間の中で不人気にした。
C2 adjective /vəˈreɪʃəs/

veracious

誠実な
Meaning
Truthful, honest; habitually speaking the truth.
Example
She gave a veracious account of what happened that day.
彼女はその日の出来事について誠実な説明をしました。
C2 adjective /ˈlaʊtɪʃ/

loutish

無礼な
Meaning
Clumsy, rude, or aggressive in behavior.
Example
His loutish remarks offended everyone at the meeting.
彼の無礼な発言は会議で皆を怒らせた。
C2 noun /spliːn/

spleen

脾臓; 怒り
Meaning
an organ in the body that produces lymphocytes and filters blood; also refers to bad temper or spite
Example
He vented his spleen on his coworkers after the meeting.
会議後、彼は同僚に対して怒りをぶつけました。
C2 adjective /ˈnjuː.trɪ.tɪv/

nutritive

栄養のある
Meaning
Relating to nutrition; having nourishing qualities.
Example
The nutritive value of the fruit is very high.
果物の栄養価は非常に高いです。
C2 noun /ˈmɒnəɡræm/

monogram

モノグラム
Meaning
A design consisting of two or more letters, typically a person's initials, combined or interwoven.
Example
The towel was embroidered with her monogram.
タオルには彼女のモノグラムが刺繍されていた。
C2 verb /ʌnˈkaʊtʃ/

uncouch

ソファから取り除く（稀な意味）
Meaning
to remove from a couch or to release from being laid down (rare/archaic usage)
Example
The surgeon attempted to uncouch the cataract.
外科医は白内障を取り除こうとしました。
C2 noun əˌdʌl.təˈreɪ.ʃən

adulteration

不正
Meaning
The action of making something poorer in quality by the addition of another substance.
Example
Adulteration of food is a serious health risk.
食品の不正は健康に対する深刻なリスクです。
C2 noun /kəˈbɑl/

Cabal

陰謀団体
Meaning
a secret political clique or faction
Example
The journalists exposed a cabal of corrupt politicians working together.
ジャーナリストたちは、共謀している腐敗した政治家たちの陰謀団体を暴露した。
C2 adjective /ˈpɪrɪk/

pyrrhic

ピリック勝利
Meaning
A victory won at such a great cost that it is almost equivalent to defeat.
Example
The general declared the battle a pyrrhic victory due to heavy losses.
将軍は大きな損失のため、この戦いをピリック勝利と宣言した。
C2 noun /ˌɪntərˈsɛʃən/

intercession

仲介
Meaning
the act of intervening or pleading on behalf of another person
Example
The prisoner was released due to the intercession of influential leaders.
囚人は影響力のあるリーダーたちの仲介で釈放されました。
C2 noun /ɪˌlɛkˈtrɑː.lə.sɪs/

electrolysis

電解
Meaning
A chemical decomposition produced by passing an electric current through a liquid or solution.
Example
Electrolysis is used to separate hydrogen from water.
電解は水から水素を分離するために使用されます。
C2 noun /staɪn/

stein

ビールジョッキ
Meaning
A large beer mug, typically made of glass or stoneware.
Example
He raised his stein to toast his friends.
彼は友達のために乾杯するためにシュタインを持ち上げました。
C2 noun /naɪˈdʒel.ə/

Nigella

ブラッククミン
Meaning
small black seeds with a nutty, slightly bitter flavor, also known as black cumin or black seed
Example
Sprinkle nigella seeds on top of the bread before baking.
パンの上にブラッククミンの種を振りかけてから焼きます。
C2 noun /ˈsʌbtərˌfjuːdʒ/

subterfuge

策略
Meaning
Deceit used to achieve one's goal; a trick or excuse to evade something.
Example
They used subterfuge to avoid paying taxes.
彼らは税金を回避するために策略を使った。
C2 noun /kəˈnɑːrd/

canard

Meaning
a false or unfounded story or rumor
Example
The article turned out to be nothing more than a canard.
C2 noun /dɪˈkæmɪtər/

decameter

デカメートル
Meaning
A metric unit of length equal to ten meters.
Example
The field was measured in decameters for accuracy.
そのフィールドは正確さのためにデカメートルで測定されました。
C2 noun /ˌdɪʃəˈbiːl/

dishabille

だらしない格好
Meaning
The state of being only partly or loosely dressed; casual or careless attire.
Example
She answered the door in a state of dishabille, wearing just a robe.
彼女はだらしない格好でドアに応答した、ローブだけを着て。
C2 noun ˌæɡ.roʊˈiː.koʊˌsɪs.təm

agroecosystem

農業生態系
Meaning
An ecological system centered on agricultural activities and processes.
Example
A healthy agroecosystem improves soil fertility.
健康な農業生態系は土壌の肥沃度を改善します。
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 /ˈoʊpiət/

opiate

Meaning
a drug containing opium or its derivatives, used to relieve pain or cause sleep
Example
The doctor prescribed an opiate to relieve the patient's pain.
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。
C2 noun /ɪnˈfrækʃən/

infraction

違反
Meaning
A violation or breach of a rule, law, or agreement.
Example
The student was punished for a minor infraction of the school rules.
学生は学校の規則の軽微な違反で罰せられました。
C2 adjective /ˌɔːfˈkiː/

off-key

外れた音
Meaning
out of tune; not in accordance with expected standards
Example
The singer was slightly off-key during the performance.
歌手はパフォーマンス中に少し外れた音だった。
C2 noun /ˈlɪbərˌtiːn/

libertine

Meaning
A person who behaves without moral principles, especially in sexual matters.
Example
The novel depicted the reckless life of a libertine in 18th century France.
C2 adjective /ˈhaɪdrəs/

hydrous

含水
Meaning
Containing water, especially water of crystallization.
Example
The mineral is hydrous because it contains water molecules in its structure.
その鉱物は水分を含んでいるため、構造内に水分子を含んでいます。
C2 noun /hɜːrˈbɛəriəm/

herbarium

標本館
Meaning
A collection of preserved plant specimens and associated data used for scientific study.
Example
The university maintains a large herbarium for research and education.
大学は研究と教育のために大きな標本館を維持しています。
C2 adjective /dɪˈstreɪ/

distrait

ぼんやりした
Meaning
deeply distracted or absent-minded, often due to worry or grief
Example
He looked distrait after hearing the sad news.
悲しい知らせを聞いた後、彼はぼんやりしているように見えた。
C2 adjective /ˈmiːli ˌmaʊðd/

mealy-mouthed

うわべだけの
Meaning
Unwilling to speak directly and honestly; insincere or evasive in speech.
Example
The manager gave a mealy-mouthed excuse instead of admitting the mistake.
マネージャーは間違いを認める代わりに、うわべだけの言い訳をしました。
C2 noun /ˌkʌmˈʌpəns/

comeuppance

報い
Meaning
A deserved punishment or fate; just deserts.
Example
The corrupt official finally got his comeuppance in court.
腐敗した役人は最終的に裁判所で自分の報いを受けた。
C2 verb /bɪˈleɪ/

belay

ロープを固定する
Meaning
to secure a rope by winding it around an object; to stop or cancel an order (nautical/military use)
Example
The climber asked his partner to belay the rope tightly.
クライマーはパートナーにロープをしっかりと確保するように頼んだ。
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

アイデア創出
Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
チームは新製品のアイデアを生み出すためにアイデーションセッションに取り組んだ。
C2 noun /ˌdɛrɪˈlɪkʃən/

dereliction

職務怠慢
Meaning
the state of being abandoned; neglect of duty
Example
The officer was charged with dereliction of duty.
その役人は職務怠慢で起訴された。
C2 noun /ˈsʌfrədʒɪst/

suffragist

女性参政権運動家
Meaning
a person advocating the extension of suffrage, especially to women
Example
The suffragists organized rallies to demand voting rights for women.
女性参政権運動家たちは女性の投票権を求めて集会を開いた。
C2 noun /ˈbeɪlɔːr/

bailor

寄託者
Meaning
a person who temporarily transfers possession of goods or property to another under a bailment agreement
Example
The bailor entrusted the valuable artwork to the museum for safekeeping.
寄託者は美術品を博物館に預けた。
C2 noun /rʌmp/

Rump

尻; お尻; 背中の下部
Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
その馬は転倒した際にお尻を痛めました。
C2 adjective /ˌɪndɪˈsɒljʊbl/

indissoluble

解消できない
Meaning
Unable to be destroyed, broken, or dissolved.
Example
Marriage was once considered an indissoluble bond.
結婚はかつて解消できない絆と見なされていました。
C2 adjective /ˈvɜːrnəl/

vernal

春の
Meaning
related to spring; fresh, youthful
Example
The garden was filled with vernal beauty after the long winter.
長い冬の後、庭は春の美しさで満たされていました。
C2 noun /ˈʃɛvrən/

chevron

V字型の記号
Meaning
A V-shaped pattern, often used in military insignia or design.
Example
The sergeant’s uniform displayed three chevrons on the sleeve.
軍曹の制服には袖に三つのシェブロンが表示されていました。
C2 adjective /ˌbiːəˈtɪfɪk/

beatific

至福の
Meaning
blissfully happy or showing great joy
Example
She had a beatific smile after hearing the good news.
彼女は良い知らせを聞いた後、至福の笑顔を浮かべていた。
C2 noun /ˈsɪlədʒɪzəm/

syllogism

三段論法
Meaning
A form of reasoning in which a conclusion is drawn from two given or assumed premises.
Example
The philosopher explained the concept of syllogism using simple examples.
哲学者は簡単な例を使って三段論法の概念を説明しました。
C2 noun /wɪt/

whit

ほんの少し
Meaning
a very small part or amount
Example
He doesn't care a whit about the outcome.
彼は結果について少しも気にしない。
C2 noun dʒɛsˌtɪk.jʊˈleɪ.ʃənz

gesticulations

ジェスチキュレーション
Meaning
Expressive hand or body movements while speaking to convey thoughts or emotions
Example
His energetic gesticulations made the speech more engaging.
彼のエネルギッシュなジェスチキュレーションズは、スピーチをさらに魅力的にしました。
C2 noun, verb /ˈtræməl/

trammel

制限
Meaning
A restriction or impediment to freedom of action; to restrict.
Example
The strict rules trammel the creativity of the students.
厳格な規則は学生の創造性を制限しています。
C2 noun /ˈpʌndʒənsi/

pungency

辛味
Meaning
The quality of having a strong, sharp taste or smell.
Example
The pungency of garlic filled the kitchen.
ニンニクの辛味がキッチンに充満した。
C2 noun /ˌdɛd ˈhiːt/

dead-heat

引き分け
Meaning
a race or contest in which two or more competitors finish exactly equal
Example
The race ended in a dead-heat between the two runners.
レースは二人のランナーの間で引き分けで終わった。
C2 verb /dɪsˈkʌmfɪt/

discomfit

困惑させる
Meaning
to make someone feel uneasy, embarrassed, or confused
Example
The interviewer’s tough questions discomfited the candidate.
インタビュアーの厳しい質問が候補者を困惑させた。
C2 verb /ˈdʒæbər/

jabber

おしゃべりする
Meaning
To talk quickly and excitedly but with little sense.
Example
The children jabbered happily after the show.
子供たちはショーの後に楽しそうにおしゃべりしました。
C2 verb /ˈwɪn.oʊ/

winnow

選別する；もみ殻から穀物を分ける
Meaning
to remove the less desirable parts from a group; originally, to separate grain from chaff by blowing air
Example
The committee will winnow the list of applicants to ten finalists.
委員会は応募者のリストを10人のファイナリストに絞り込む予定です。
C2 /ˈpæn.ə.pli/

panoply

全装備
Meaning
A complete or impressive collection of things; a full set of armor.
Example
The museum displayed a panoply of ancient weapons.
博物館は古代の武器の全装備を展示しました。
C2 adjective /pəˈlædʒ.ɪk/

pelagic

外洋に関連する
Meaning
Relating to the open sea or ocean water column, away from the shore.
Example
Pelagic fish like tuna are found far from the coast.
ツナのような外洋性の魚は海岸から遠くで見つかります。
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 noun /ˈhɑːdɪhʊd/

hardihood

勇気、大胆さ
Meaning
Courage, boldness, or daring behavior; also physical robustness.
Example
The mountaineer's hardihood impressed the entire team.
登山家のハーディフッドはチーム全体を感動させました。
C2 verb /ˈtɪpəl/

tipple

少し飲む
Meaning
to drink alcohol, especially regularly or in small amounts
Example
He likes to tipple at the local pub after work.
彼は仕事の後、地元のパブで少し飲むのが好きです。
C2 noun /ˈspɛndˌθrɪft/

spendthrift

浪費家
Meaning
A person who spends money extravagantly or wastefully.
Example
The young prince was known as a spendthrift, wasting his fortune on lavish parties.
若い王子は浪費家として知られ、贅沢なパーティーに財産を浪費していた。
C2 noun ˈhɑːrbərɪdʒ

harborage

避難所
Meaning
A place of shelter or refuge for pests or animals.
Example
Pests need a harborage site to survive and breed.
害虫は生き残り、繁殖するために避難所が必要です。
C2 noun /ˈhʌmbʌɡ/

humbug

詐欺, くだらないこと
Meaning
Deceptive or false talk or behavior; nonsense.
Example
He dismissed the idea as humbug.
彼はその考えをくだらないことだとして退けた。
C2 noun /ˈlæn.sɪt/

lancet

外科用ナイフ
Meaning
a small, sharp, two-edged surgical knife used for making small incisions
Example
The doctor used a lancet to prick the patient’s finger for a blood test.
医者は血液検査のために患者の指を刺すためにランセットを使用しました。
C2 adjective /ɪnˈdʒɛnjuəs/

ingenuous

無邪気
Meaning
Innocent, naive, and unsuspecting; showing childlike simplicity and sincerity.
Example
Her ingenuous smile revealed her genuine kindness.
彼女の無邪気な笑顔は彼女の本当の優しさを明らかにしました。
C2 noun /juːˌtɪlɪˈtɛəriənɪzəm/

utilitarianism

功利主義
Meaning
The ethical theory that actions are right if they are useful or for the benefit of the majority.
Example
Utilitarianism suggests that we should act to maximize overall happiness.
功利主義は、私たちが全体的な幸福を最大化するために行動すべきだと示唆しています。
C2 adjective /ˈvoʊlənt/

volant

飛べる
Meaning
able to fly or moving swiftly
Example
The volant bird soared gracefully across the sky.
その飛べる鳥は空を優雅に飛んでいました。
C2 noun /ˈfoʊ.nə.ɡræm/

phonogram

音声記号
Meaning
a written symbol representing a speech sound
Example
The teacher showed how each phonogram represents a particular sound.
教師は、各フォノグラムが特定の音を表す方法を示しました。
C2 verb /ˈɡɑːrbəl/

garble

混乱させる
Meaning
To reproduce a message in a confused, distorted, or unclear way.
Example
The poor phone connection garbled his words.
電話の接続不良で彼の言葉が聞き取れなかった。
C2 noun /ˈmaɪkrəˌkɒzəm/

microcosm

ミクロコスム
Meaning
A small, representative system having analogies to a larger system; a miniature version of something.
Example
The small town is a microcosm of the entire nation.
その小さな町は、国全体のミクロコスムです。
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

不確実性
Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
ロトで二回連続で当選する可能性の低さは、彼女がチケットを買うのを止めませんでした。
C2 noun /ˈflætʃələns/

flatulence

消化器系のガスの蓄積
Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
豆を食べると時々おならが出ることがあります。
C2 noun /ˌlɛksɪˈkɒɡrəfər/

lexicographer

辞書編纂者
Meaning
A person who compiles, writes, or edits dictionaries.
Example
The lexicographer spent years compiling the dictionary.
そのレキシコグラファーは辞書を編纂するのに数年を費やした。
C2 verb /ˈkɒd.l̩/

coddle

過保護にする
Meaning
to treat someone with excessive care or kindness, often in a way that is overprotective
Example
Parents should support their children without coddling them.
親は子供を甘やかさずにサポートすべきです。
C2 adjective /kənˈdʌktəbl̩/

conductible

導電性の
Meaning
capable of being conducted, especially electricity or heat
Example
Copper is highly conductible to electricity.
銅は電気を非常に導きやすい。
C2 noun /ˈɡlæsi fɪʃ/

Glassy fish

ガラスの魚
Meaning
a transparent freshwater fish with a glassy appearance, popular in aquariums
Example
The glassy fish is known for its transparent body and peaceful nature.
ガラスの魚はその透明な体と穏やかな性格で知られています。
C2 adjective /əˈstrɪndʒənt/

astringent

厳しい
Meaning
sharp or severe in manner or style; also describes a substance that contracts skin or body tissues
Example
Her astringent tone silenced the noisy class.
彼女の厳しい口調は、騒々しいクラスを静めた。
C2 noun /ˈtrɪbjuːn/

tribune

Meaning
a person or platform representing the people; historically, a Roman official elected to protect citizens' rights
Example
He was seen as a tribune of the common people.
C2 verb /əˈbɛt/

abet

Meaning
to encourage or assist someone to commit a crime or wrongdoing
Example
He was accused of abetting the criminals in their escape.
C2 adjective /ˈvækjuəs/

vacuous

空虚
Meaning
Having or showing a lack of thought or intelligence; mindless.
Example
She gave a vacuous smile during the serious discussion.
彼女は真剣な議論の中で空虚な笑顔を見せた。
C2 adjective /ˈlʌstrəs/

lustrous

光沢のある
Meaning
having a gentle sheen or soft glow
Example
Her hair looked smooth and lustrous.
彼女の髪は滑らかで光沢のあるように見えた。
C2 noun /ˈpær.ɪ.saɪd/

parricide

親殺し
Meaning
The act of killing one's father, mother, or other close relative.
Example
The court tried him for parricide after the tragic incident.
悲劇的な事件の後、裁判所は彼を親殺しの罪で裁いた。
C2 verb /ɛksˈhjuːm/

exhume

発掘する
Meaning
to dig out something buried, especially a body from the ground
Example
The archaeologists decided to exhume the ancient remains.
考古学者たちは古代の遺物を発掘することに決めました。
C2 noun /ˈmɒnəˌsɪləbəl/

monosyllable

単音節の言葉
Meaning
A word consisting of only one syllable.
Example
Words like 'yes' and 'no' are monosyllables.
'はい'や'いいえ'のような言葉は単音節の言葉です。
C2 adjective /ˈpruːdɪʃ/

prudish

堅苦しい
Meaning
having or revealing a tendency to be easily shocked by matters relating to sex or nudity
Example
She was too prudish to watch the movie with her friends.
彼女は友達と映画を見に行くにはあまりにも堅苦しかった。
C2 adjective /ˈæn.ə.daɪn/

anodyne

無害な、痛みを和らげる
Meaning
Not likely to cause offense; bland or harmless. Also refers to something that relieves pain.
Example
The speaker’s anodyne remarks avoided controversy.
スピーカーの無害なコメントは論争を避けました。
C2 adjective /ˌɑːrbəˈrɛsənt/

arborescent

樹木のような
Meaning
having the appearance or characteristics of a tree; tree-like
Example
The coral had an arborescent form that resembled a miniature forest.
サンゴは、小さな森に似た樹木のような形をしていた。
C2 adjective /ˈræŋ.kər.əs/

rancorous

恨みを持った
Meaning
Characterized by bitterness or resentment.
Example
Their rancorous debate lasted for hours.
彼らの恨みを持った議論は何時間も続いた。
C2 verb /ˌɪn.trəˈmɪt/

intromit

挿入する
Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
医者は慎重に器具を傷口に挿入しました。
C2 noun /ˈmɪsənˌθroʊp/

misanthrope

人間嫌い
Meaning
a person who dislikes or distrusts humankind
Example
The old man was considered a misanthrope who avoided all social gatherings.
その老人は、すべての社交的な集まりを避けるミサントロープと見なされていました。
C2 noun /ˈdeɪ.mæn/

day-man

日雇い労働者
Meaning
a worker employed by the day; a day laborer
Example
The farmer hired a day-man to help with the harvest.
農家は収穫を手伝うために日雇い労働者を雇いました。
C2 verb /flɪt/

flit

ひらひら舞う
Meaning
to move quickly and lightly from one place to another
Example
Butterflies flitted from flower to flower.
蝶が花から花へひらひらと舞った。
C2 noun /ˈhɔːrn.bɪl/

Hornbill

ホーンビル鳥
Meaning
a large tropical bird with a large curved beak and often a horn-like projection
Example
The colorful hornbill perched on the highest branch.
色とりどりのホーンビルが最も高い枝に止まった。
C2 adjective /ɪkˌstɛmpəˈreɪniəs/

extemporaneous

準備なしで行う
Meaning
Spoken or done without preparation.
Example
He gave an extemporaneous speech at the meeting.
彼は会議で即興のスピーチをしました。
C2 noun /ˈæktʃuˌɛri/

actuary

アクチュアリー
Meaning
A professional who analyzes financial risk using mathematics, statistics, and financial theory, especially in insurance and pensions.
Example
The actuary calculated the risk before finalizing the insurance policy.
アクチュアリーは保険契約を最終決定する前にリスクを計算しました。
C2 noun /tʃəˈmeɪ.li/

Chameli

ジャスミン
Meaning
a variety of jasmine flower with small white fragrant petals
Example
The chameli flowers are commonly used to make garlands and perfumes.
ジャスミンの花はよく花輪や香水を作るために使われます。
C2 noun /ˈhʌk.stər/

huckster

露天商人
Meaning
A person who sells small items aggressively, often in a showy or dishonest way.
Example
The huckster loudly promoted his goods in the busy marketplace.
その露天商人は賑やかな市場で自分の商品を大声で宣伝していました。
C2 adjective /hɛkˈsæŋɡjələr/

hexangular

六角形の
Meaning
Having six angles or corners.
Example
The artist designed a hexangular frame for the mirror.
アーティストは鏡のために六角形のフレームをデザインしました。
C2 noun /ˌdʒiː.niˈæl.ə.ti/

geniality

親しみやすさ
Meaning
the quality of being friendly and cheerful
Example
His geniality made him popular among his colleagues.
彼の親しみやすさは、同僚の間で彼を人気者にした。
C2 verb /əbˈtruːd/

obtrude

押し付ける
Meaning
to force oneself or one's ideas into a situation uninvited or inappropriately
Example
He didn’t want to obtrude into their private conversation.
彼は彼らのプライベートな会話に押し付けたくなかった。
C2 noun /bəˈlɛəroʊ/

bolero

ボレロ（スペインのダンスまたは前が開いた短いジャケット）
Meaning
A Spanish dance in slow triple time, or a short jacket open at the front.
Example
The dancers performed a passionate bolero at the festival.
ダンサーたちはフェスティバルで情熱的なボレロを演奏しました。
C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

解消されていない
Meaning
Not made less intense or relieved; unrelieved.
Example
His grief remained unassuaged despite the passage of time.
彼の悲しみは時間が経っても解消されていなかった。
C2 noun /ˈhænd ˌrɪŋɪŋ/

hand-wringing

過剰な心配
Meaning
excessive worry or concern expressed in a visible or dramatic way.
Example
There was much hand-wringing over the political crisis.
政治危機について多くの心配がありました。
C2 noun /ˈlɑːrsəni/

larceny

窃盗
Meaning
The unlawful taking of personal property with intent to deprive the rightful owner of it.
Example
He was arrested for committing larceny at the store.
彼は店で窃盗を行ったため逮捕されました。
C2 adjective /ˌrɒŋˈhɛd.ɪd/

wrongheaded

誤った考え方
Meaning
Having or showing bad judgment or stubbornly holding to wrong ideas.
Example
The policy was considered wrongheaded and harmful.
その政策は誤った考え方で有害だと見なされた。
C2 noun /kɛn/

ken

理解の範囲
Meaning
one's range of knowledge or understanding
Example
Quantum physics is beyond my ken.
量子物理学は私の理解を超えています。
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

非の打ち所がない
Meaning
Not open to objection; acceptable and unobjectionable
Example
His behavior was unexceptionable throughout the event.
彼の行動はイベント中ずっと非の打ち所がなかった。
C2 verb /ˈɡɑːɡəl/

goggle

目を見開いて見る
Meaning
to stare with wide open eyes, often in surprise or wonder
Example
The tourists goggled at the tall skyscrapers.
観光客は高い摩天楼を驚きながら見つめていた。
C2 adjective/adverb /ˌæ.prəˈpoʊ/

apropos

適切
Meaning
Appropriate to the situation; relevant. As an adverb, it means 'with reference to' or 'regarding'.
Example
His comments were not apropos of the discussion.
彼のコメントは議論には適切ではなかった。
C2 adjective /pərˈfɛktəbl/

perfectible

完璧にできる
Meaning
capable of being made perfect or improved
Example
Human nature is imperfect but perfectible.
人間の本性は不完全だが、完璧にできる。
C2 noun /ˌmɔːzəˈliːəm/

mausoleum

霊廟
Meaning
A large stately building that houses a tomb or several tombs.
Example
The king was buried in a grand mausoleum.
王は壮大な霊廟に埋葬されました。
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。
C2 adjective /ˈwɜːkmənˌlaɪk/

workmanlike

職人仕事
Meaning
Showing efficient, competent, and practical skill, but without flair or creativity.
Example
The carpenter delivered a workmanlike performance on the project.
大工はプロジェクトで職人仕事のようなパフォーマンスを発揮しました。
C2 noun /ˌnɒn ˈsɛkwɪtər/

non sequitur

論理的に関連しない発言
Meaning
a statement or conclusion that does not logically follow from the previous statement
Example
His comment about the weather was a complete non sequitur during the budget discussion.
予算の議論中、彼の天気に関するコメントは完全に論理的に関連しない発言だった。
C2 noun ˌsɜːkəmˈspekʃən

circumspection

慎重、リスクを避けること
Meaning
The quality of being wary and unwilling to take risks; prudence.
Example
His circumspection ensured no mistakes were made.
彼の慎重さが間違いを犯さないようにしました。
C2 noun /ˈbloʊˌhɑrd/

blowhard

自慢話をする人
Meaning
a person who brags a lot or talks in a boastful way
Example
Everyone avoided the blowhard at the party because he wouldn't stop bragging.
パーティーでみんなはその自慢話をする人を避けた。なぜなら、彼は自慢を止めなかったから。
C2 adjective /ˈpeɪli/

paly

縞模様
Meaning
striped with different colors, usually used in heraldry
Example
The knight’s shield was decorated with paly stripes of red and gold.
騎士の盾には赤と金の縞模様が飾られていた。