americanism
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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.
C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

偶然の
Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
彼らの出会いは完全に偶然でした。
C2 adjective /eɪˈrɪðmɪk/

arrhythmic

不整脈
Meaning
Lacking a regular rhythm or beat.
Example
The patient had an arrhythmic heartbeat.
患者は不整脈を持っていた。
C2 adjective /ɪkˈstɛnsəbl/

extensible

拡張可能
Meaning
able to be extended; capable of expansion.
Example
The software is designed to be extensible with new features.
そのソフトウェアは新しい機能で拡張可能なように設計されています。
C2 noun /ˈmɪlk pɒt/

Milk-pot

ミルクポット
Meaning
a container specifically used for storing or serving milk
Example
She poured fresh milk from the milk-pot into her glass.
彼女はミルクポットから新鮮なミルクをグラスに注いだ。
C2 verb /ɪmˈpeɪl/

impale

突き刺す
Meaning
to pierce or fix something with a sharp object
Example
The knight was impaled by the enemy’s spear.
騎士は敵の槍で突き刺さった。
C2 adjective /ˈpʌdʒi/

pudgy

ぽっちゃり
Meaning
slightly fat or chubby in a way that is often cute
Example
The baby had pudgy cheeks that everyone adored.
その赤ちゃんは、みんなが愛したぽっちゃりしたほっぺたを持っていました。
C2 adjective /ˌɪnsəˈpɔːrtəbl̩/

insupportable

耐えられない
Meaning
Too extreme or difficult to be endured.
Example
The heat was insupportable during the long journey.
長い旅の間、暑さは耐えられなかった。
C2 adjective, noun /ˈɡreɪtɪŋ/

grating

耳障りな音 / 金属の格子
Meaning
Harsh and unpleasant to the senses, especially sound; a framework of bars covering an opening.
Example
The teacher's grating voice made it hard to concentrate.
先生の耳障りな声で集中するのが難しかった。
C2 verb /hjuː/

hew

切る
Meaning
To chop or cut something, especially wood or stone, with a tool.
Example
The workers hewed logs to build the cabin.
労働者たちは小屋を建てるために丸太を切った。
C2 noun /ˈpɛtjʊləns/

petulance

気難しさ
Meaning
The quality of being childishly sulky or bad-tempered.
Example
His petulance during the meeting annoyed everyone.
会議中の彼のペチュランスはみんなをイライラさせた。
C2 noun /lɪˈvaɪəθən/

leviathan

巨大な海の怪物
Meaning
a huge sea monster or something very large and powerful.
Example
The ship looked like a leviathan on the horizon.
その船は地平線上で巨大な海の怪物のように見えました。
C2 adjective /ɪnˈvaɪələt/

inviolate

汚されていない
Meaning
free from violation, injury, or desecration; kept safe and untouched
Example
The ancient temple remained inviolate for centuries.
古代の寺院は何世紀にもわたって汚されることなく保たれました。
C2 adjective /ˌdeɪ.kɒlˈteɪ/

decollete

深い胸元の衣装
Meaning
of a woman's dress or top, cut low so as to reveal the neck and upper chest
Example
She wore a decollete gown to the party.
彼女はパーティーで深い胸元のドレスを着ていました。
C2 noun /dɪˈfoʊliənt/

defoliant

Meaning
a chemical that causes leaves to drop from plants, often used in warfare or agriculture
Example
The army sprayed defoliant to clear the forest cover.
C2 adjective /ˌækrəˈmætɪk/

achromatic

無彩色
Meaning
without color; free from color
Example
The designer chose an achromatic palette of black, white, and gray.
デザイナーは黒、白、灰色の無彩色なパレットを選びました。
C2 adjective /ˈneb.jə.ləs/

Nebulous

曖昧な; 不明瞭な; 霧のような
Meaning
vague or unclear; lacking definite form; hazy
Example
His plans for the future remain nebulous and unclear.
彼の未来の計画は依然として曖昧で不明確です。
C2 noun /θiˈɒsəfi/

theosophy

テオソフィー
Meaning
A religious or philosophical belief system that seeks direct knowledge of the mysteries of life and the divine.
Example
Theosophy attracted people interested in mysticism and spiritual growth.
テオソフィーは神秘主義や精神的成長に興味を持つ人々を引き寄せた。
C2 noun, adjective /ˌtætərdɪˈmeɪliən/

tatterdemalion

ぼろぼろの服を着た人
Meaning
A person dressed in ragged clothes; ragged or dilapidated in appearance.
Example
A tatterdemalion wandered the streets in search of food.
タッターデマリオンは食べ物を探して通りを歩いていました。
C2 adjective /əˈpɒ.krɪ.fəl/

apocryphal

疑わしい
Meaning
Of doubtful authenticity, though widely circulated as true.
Example
The story about him saving the village is probably apocryphal.
彼が村を救ったという話は、おそらく疑わしい。
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.
C2 noun /ˈbrɪk ə ˌbræk/

bric-a-brac

小さな装飾品
Meaning
Small decorative objects or ornaments, often of little value.
Example
The shelves were filled with old bric-a-brac from her travels.
棚は彼女の旅行から持ち帰った古い小さな装飾品でいっぱいだった。
C2 adjective /ˈbrækɪʃ/

brackish

塩水混合
Meaning
Slightly salty, often describing water that is a mix of fresh and seawater.
Example
The river estuary contained brackish water.
川の河口には塩水混合の水があった。
C2 adjective /dɪsˈkʌmfɪtɪŋ/

discomfiting

不快な
Meaning
Causing unease, embarrassment, or discomfort.
Example
His discomfiting questions made everyone shift uncomfortably in their seats.
彼の不快な質問は、皆が座席で不安そうに動かせるようにさせた。
C2 noun /ˈmɛtrəˌnoʊm/

metronome

メトロノーム
Meaning
A device that produces regular ticks or beats to help musicians maintain tempo.
Example
She practiced the piano with a metronome to keep steady timing.
彼女は安定したタイミングを保つためにメトロノームを使ってピアノを練習していた。
C2 noun /ˈpɛd.ən.tri/

pedantry

細かい詳細やルールへの過度なこだわり
Meaning
Excessive concern with minor details or rules.
Example
His pedantry made the meeting unnecessarily long.
彼のペダントリーは会議を不必要に長くした。
C2 verb /ɪˈmeɪʃieɪt/

emaciate

衰弱させる
Meaning
To make abnormally thin or weak, usually because of illness or lack of food.
Example
The prisoners were emaciated after months without proper food.
囚人たちは数ヶ月間適切な食事がなくて衰弱していました。
C2 noun /ˌpætrəˈnɪmɪk/

patronymic

父系姓
Meaning
a name derived from the name of a father or ancestor
Example
In many cultures, surnames are patronymic in origin.
多くの文化では、姓は父系姓に由来します。
C2 adjective /mæɡˈnɪləkwənt/

magniloquent

誇張した言葉
Meaning
using high-flown or pompous language
Example
The politician’s magniloquent speech impressed the crowd.
その政治家の誇張したスピーチは群衆に印象を与えた。
C2 adjective /ˈbɔːlki/

balky

頑固
Meaning
difficult, uncooperative, or stubborn
Example
The balky printer refused to work when needed most.
頑固なプリンターは最も必要な時に動作を拒否しました。
C2 noun /ˈpɑr.bəl/

Parbal

尖ったウリ
Meaning
A green vegetable also known as pointed gourd, commonly used in South Asian cuisine
Example
Mother prepared parbal curry with fish.
母は魚と一緒に尖ったウリのカレーを作りました。
C2 noun /ˌdiːnəʊˈteɪʃən/

denotation

指示
Meaning
The literal or primary meaning of a word, in contrast to the feelings or ideas that the word suggests.
Example
The denotation of the word 'rose' is a type of flower.
'ローズ'という単語のデノテーションは花の一種です。
C2 noun /pɪˈlɑːf/

Pillaw

ピラフ
Meaning
a dish of rice cooked in seasoned broth, often with meat and vegetables
Example
We enjoyed a delicious chicken pillaw for dinner.
私たちは夕食に美味しいチキンピラフを楽しみました。
C2 verb /ɛmˈbleɪzən/

emblazon

目立つ方法で飾る
Meaning
To decorate or display something in a noticeable or impressive way.
Example
The team's logo was emblazoned on their uniforms.
チームのロゴは彼らのユニフォームに鮮明に表示されていました。
C2 adjective /ˈmæn.laɪk/

manlike

男性的
Meaning
Having qualities or characteristics traditionally associated with a man; manly.
Example
His manlike courage impressed everyone in the village.
彼の男性的な勇気は村の皆に感動を与えました。
C2 adjective /ɡrɪˈɡɛəriəs/

gregarious

社交的
Meaning
Fond of company; sociable.
Example
She is a gregarious person who loves meeting new people.
彼女は新しい人々と会うのが好きな社交的な人です。
C2 verb /djuːp/

dupe

だます
Meaning
To deceive or trick someone into believing or doing something.
Example
He was duped into buying a fake watch.
彼は偽物の時計を買うようにだまされました。
C2 noun /ˈɡlʌtəni/

gluttony

暴食
Meaning
Excessive eating or drinking; overindulgence in food or drink.
Example
His gluttony during the festival left him feeling sick.
祭りの間の彼の暴食は、彼を病気にさせました。
C2 adjective /sɪmˈfoʊniəs/

symphonious

Meaning
Harmonious; producing a pleasant sound or agreement of sound.
Example
The choir's voices were symphonious and filled the hall with beauty.
C2 verb, noun /ɡaʊdʒ/

gouge

えぐる、不当に高く売る
Meaning
To cut or scoop out a deep hole or groove; to overcharge unfairly.
Example
He accidentally gouged a hole in the wooden table.
彼はうっかり木製のテーブルに穴を開けました。
C2 adjective /ˈsuːpaɪn/

supine

仰向けで横たわる
Meaning
Lying on the back, face upward; failing to act due to laziness or weakness.
Example
He lay supine on the grass, staring at the stars.
彼は草の上に仰向けで横たわり、星を見ていた。
C2 adjective ˌɪm.pəˈtɜː.bə.bəl

imperturbable

冷静沈着
Meaning
Unable to be upset or excited; not easily disturbed.
Example
His imperturbable nature made him a great leader.
彼の冷静沈着な性格は、彼を偉大なリーダーにした。
C2 adjective /ˈsʌmp.tʃuˌɛr.i/

sumptuary

贅沢品の個人的な支出を制限する法律または規制に関連する
Meaning
Relating to laws or regulations intended to limit personal spending on luxury goods.
Example
In medieval Europe, sumptuary laws restricted the wearing of expensive fabrics to the nobility.
中世ヨーロッパでは、贅沢品法が高価な布地の着用を貴族に限定していました。
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 /pəˈnʌmbrə/

penumbra

部分的な影
Meaning
a partially shaded area around the shadow of an object, especially during an eclipse
Example
The moon’s penumbra created a dim shadow over the Earth.
月のペヌンブラが地球上に薄暗い影を作り出しました。
C2 adjective /pʌɡˈneɪʃəs/

pugnacious

好戦的な
Meaning
Having a quarrelsome or combative nature; eager to fight.
Example
His pugnacious attitude often got him into trouble.
彼の好戦的な態度はしばしば彼を困難に陥れました。
C2 adjective /ˈtjuːtɪləri/

tutelary

守護神
Meaning
Relating to or serving as a guardian or protector, often used for deities or spirits.
Example
Athena was considered the tutelary goddess of Athens.
アテナはアテネの守護神と見なされていました。
C2 noun /ˈɒbsɪkwi/

obsequy

葬儀
Meaning
A funeral rite, usually used in plural form obsequies.
Example
The village gathered for the obsequy of their beloved teacher.
村人たちは、愛する教師の葬儀のために集まりました。
C2 noun /ɪkˈsɔːr.ə/

Ixora

イクソラ
Meaning
a tropical flowering shrub with clusters of small bright red, orange, or yellow flowers
Example
The bright red ixora bushes lined the pathway to the tropical garden.
明るい赤いイクソラの低木が熱帯庭園への小道を囲んでいました。
C2 adjective /ˈpɑːmi/

palmy

繁栄 / 栄光
Meaning
prosperous, flourishing, or relating to palm trees
Example
He often reminisced about the palmy days of his youth.
彼は若い頃の繁栄した日々をよく思い出していました。
C2 verb /ˌɪntərˈlɒk/

interlock

かみあう
Meaning
to fit or connect together securely so that two or more things are joined
Example
The gears interlock to ensure smooth movement of the machine.
ギアは機械のスムーズな動作を確保するために噛み合います。
C2 adjective /ˈhɔːri/

hoary

灰色の, 古い
Meaning
gray or white with age; very old and respected
Example
The hoary oak tree stood as a witness to centuries of history.
古いオークの木は何世代にもわたる歴史の証人として立っていた。
C2 adjective /ˈpɔːrtli/

portly

ぽっちゃり
Meaning
Having a stout or somewhat fat body, often implying dignity or authority.
Example
The portly man entered the room with confidence.
ぽっちゃりな男性は自信を持って部屋に入った。
C2 noun /ˈkuː.li/

Cooly

クーリー
Meaning
a laborer who does physical work for wages
Example
The cooly carried heavy bags at the railway station.
クーリーは駅で重い荷物を運んでいました。
C2 adjective /rɪˈflɛksəbl/

reflexible

反射可能な
Meaning
Capable of being reflected or bent back.
Example
The surface was highly reflexible, bouncing light in different directions.
その表面は非常に反射可能で、光を異なる方向に反射させていました。
C2 noun /ˈdʒaɪər/

gyre

渦, 円形海洋流
Meaning
A circular or spiral motion or form, especially a giant circular oceanic surface current.
Example
The Great Pacific Garbage Patch is trapped in a gyre.
太平洋のゴミの大きな塊は渦に閉じ込められています。
C2 noun /ˌɪntərpəˈzɪʃən/

interposition

介入
Meaning
The act of intervening or coming between two things, often to influence or prevent an outcome.
Example
The manager’s interposition prevented a heated argument from escalating.
マネージャーの介入は、激しい議論がエスカレートするのを防ぎました。
C2 noun /ˌɪnkrɪˈdjuːləti/

incredulity

不信
Meaning
the state of being unwilling or unable to believe something
Example
She looked at him with incredulity after hearing the strange story.
彼女はその奇妙な話を聞いた後、不信のまなざしで彼を見つめた。
C2 adjective /ˈdɛsɪkeɪtɪd/

desiccated

乾燥した
Meaning
completely dried, having had all moisture removed
Example
The museum displayed desiccated specimens of plants.
博物館は乾燥した植物標本を展示した。
C2 noun /əˈnækrəˌnɪzəm/

anachronism

Meaning
something that is out of its proper time period, especially something old-fashioned in a modern context
Example
Using a typewriter today feels like an anachronism.
C2 noun /ˈkæn.toʊ/

canto

カント
Meaning
A main division of a long poem, especially in epic poetry.
Example
The Divine Comedy is divided into several cantos.
神曲は複数のカントに分かれています。
C2 verb /ˈmɒrəlaɪz/

moralize

道徳化する
Meaning
To comment on issues of right and wrong, often with an air of superiority.
Example
He tends to moralize about other people's choices.
彼は他の人々の選択について道徳的なコメントをする傾向がある。
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。
C2 adverb /əˈmʌk/

amuck

無秩序に
Meaning
in a frenzied, uncontrolled, or chaotic manner
Example
The bull ran amuck through the village.
雄牛は村を無秩序に走り回った。
C2 noun /ɡænˈdʒɛtɪk liːf fɪʃ/

Gangetic Leaf Fish

ガンジスリーフフィッシュ
Meaning
a small freshwater fish species found in the Ganges river system, known for its leaf-like appearance
Example
The Gangetic Leaf Fish is commonly found in the rivers of Bangladesh.
ガンジスリーフフィッシュはバングラデシュの川によく見られます。
C2 noun /ˈplætɪtjuːd/

platitude

陳腐な言葉
Meaning
a remark or statement that is overused and unoriginal
Example
He kept repeating the same platitudes during the speech.
彼はスピーチの中で同じプレティチュードを繰り返し続けた。
C2 noun /waɪl/

wile

策略, 欺瞞
Meaning
A trick or clever scheme meant to deceive or outwit someone.
Example
He used every wile to win her trust.
彼は彼女の信頼を勝ち取るためにあらゆる策略を使った。
C2 noun /sɪnˈtɪl.ə/

scintilla

小さな火花
Meaning
A tiny trace or spark of a specified quality or feeling.
Example
There wasn’t a scintilla of doubt in her mind.
彼女の心には疑いのひらめきもなかった。
C2 noun /ˈsteɪtkraft/

statecraft

国政術
Meaning
The art of governing and managing state affairs effectively.
Example
The leader was praised for his exceptional statecraft in handling international relations.
リーダーは国際関係を扱う際の卓越した国政術に対して称賛されました。
C2 verb /diːˈfrɑːk/

defrock

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

refringent

屈折性
Meaning
Capable of refracting light or other waves.
Example
The refringent properties of the crystal bent the light into a spectrum.
結晶の屈折性の特性は光をスペクトルに曲げました。
C2 adjective ˌsʌr.əpˈtɪʃ.əs

surreptitious

秘密の
Meaning
Kept secret, especially because it would not be approved of; done stealthily.
Example
She took a surreptitious glance at his notes.
彼女は彼のノートをひそかに覗き見た。
C2 noun /ɒmˈnɪʃəns/

omniscience

全知
Meaning
the state of knowing everything
Example
The novel's narrator has an air of omniscience, revealing every character's thoughts.
小説の語り手は全知の空気をまとい、すべてのキャラクターの考えを明らかにしている。
C2 noun /dəˈɡerəˌtaɪp/

daguerreotype

古い写真
Meaning
An early type of photograph produced on a silver or silver-covered copper plate.
Example
The museum displayed a rare daguerreotype of Abraham Lincoln.
博物館にはアブラハム・リンカーンの珍しいダゲレオタイプが展示されていました。
C2 noun /ˈkærəˌpeɪs/

carapace

カメやカニの背中を覆う硬い殻
Meaning
the hard shell covering the back of some animals like turtles and crabs
Example
The turtle withdrew into its carapace for protection.
カメは保護のためにカラパスに引っ込んだ。
C2 adjective /ˈpjʊəraɪl/

puerile

幼稚な
Meaning
childishly silly or immature
Example
His puerile jokes annoyed the audience.
彼の幼稚な冗談は観客をうんざりさせた。
C2 noun /fɪˈlɒl.ə.dʒi/

philology

書かれた歴史的な資料における言語の研究; 言語学
Meaning
the study of language in written historical sources; linguistics
Example
She devoted her career to philology, researching ancient manuscripts.
彼女はフィロロジーに自分のキャリアを捧げ、古代の写本を研究していました。
C2 verb /ˈstɪp.əl/

stipple

小さな点で覆う
Meaning
to cover a surface with numerous small dots or specks, often in drawing or painting
Example
The artist stippled the canvas to create a textured effect.
アーティストはキャンバスに小さな点をつけて、テクスチャ効果を作り出しました。
C2 adjective /ˈfræk.ʃəs/

Fractious

わがままな; けんか腰の; 手に負えない
Meaning
irritable and quarrelsome; difficult to control; bad-tempered
Example
The fractious child refused to follow any of the teacher's instructions.
その気難しい子供は教師の指示に従うことを拒否しました。
C2 noun /ˈæn.dʒi.əʊ.plæs.ti/

angioplasty

血管を開くための医療手術で、心臓に血液を供給する血管が閉塞または狭窄している場合に行われます。
Meaning
A medical procedure to open blocked or narrowed blood vessels that supply blood to the heart.
Example
Angioplasty is now safer with robotic assistance.
ロボット支援で、アンジオプラスティは現在より安全です。
C2 verb /flɛdʒ/

fledge

飛べるようになる
Meaning
To develop wing feathers large enough for flight; to bring up until able to fly.
Example
The young birds will fledge in a few weeks.
若い鳥たちは数週間以内に飛べるようになる。
C2 adjective /ˈpɛstɪlənt/

pestilent

有害
Meaning
Causing or tending to cause death or destruction; harmful or pernicious.
Example
The pestilent atmosphere of the swamp made people sick.
沼地の有害な雰囲気が人々を病気にさせた。
C2 noun /dɪˈstɛnʃən/

distention

膨張
Meaning
The state of being swollen due to internal pressure.
Example
The patient complained of abdominal pain and distention.
患者は腹痛と膨張感を訴えました。
C2 noun /sɛnˈsɔːrɪəm/

sensorium

感覚中枢
Meaning
The part of the brain or mind concerned with the reception and interpretation of sensory stimuli.
Example
The patient’s sensorium was clouded after the accident.
事故後、患者の感覚中枢はぼやけていた。
C2 verb /ˈnuːkliˌeɪt/

nucleate

核形成
Meaning
to form into a nucleus or bring together into a central part
Example
The droplets began to nucleate around tiny particles in the air.
水滴は空気中の小さな粒子の周りで核を形成し始めました。
C2 adjective /ˌæd.vɛnˈtɪʃ.əs/

adventitious

偶発的
Meaning
Happening by chance or accident, not planned.
Example
His success was partly due to adventitious circumstances.
彼の成功は偶発的な状況による部分があった。
C2 verb /ʌnˈkloʊð/

unclothe

服を脱がせる; 衣服を取り除く
Meaning
to remove clothing from someone or something
Example
The nurse helped unclothe the patient for the examination.
看護師は検査のために患者の服を脱がせる手伝いをした。
C2 adjective /ɪˈfʌldʒənt/

effulgent

輝かしい
Meaning
Shining brilliantly; radiant.
Example
Her effulgent smile brightened everyone's mood.
彼女の輝かしい笑顔は皆の気分を明るくした。
C2 adjective /ˌɪlˈneɪ.tʃəd/

ill-natured

性格が悪い
Meaning
Having a bad or unpleasant character; unkind or malicious.
Example
He made an ill-natured remark about his colleague.
彼は同僚について悪意のある発言をしました。
C2 adjective /ˌɪnˈekspɜːrt/

inexpert

未熟な
Meaning
not skilled or experienced; lacking expertise
Example
The inexpert handling of the machine caused several mistakes.
機械の未熟な扱いがいくつかのミスを引き起こした。
C2 noun /ˌmɪstɪfɪˈkeɪʃən/

mystification

困惑, 神秘化
Meaning
the act of making something unclear or confusing; a state of being puzzled or bewildered
Example
The audience watched in mystification as the magician performed his tricks.
観客はマジシャンが手品を披露する間、困惑して見ていた。
C2 adjective /ɪnˈsɛndiˌɛri/

incendiary

扇動的な / 挑発的な
Meaning
designed to cause fires or stir up conflict
Example
The politician’s incendiary remarks angered the crowd.
政治家の挑発的な発言が群衆を怒らせた。
C2 noun /ˈbɪlɪŋzˌɡeɪt/

billingsgate

粗野または侮辱的な言葉
Meaning
Coarse or abusive language; vulgar or offensive speech.
Example
The heated argument quickly descended into billingsgate.
激しい議論はすぐに粗野な言葉に変わった。
C2 noun /hæˈʃiːʃ/

hashish

ハシシ
Meaning
a drug made from the resin of the cannabis plant
Example
The police arrested him for possessing hashish.
警察は彼をハシシを所持していたため逮捕した。
C2 noun /ˈlɛtʃ.əri/

lechery

淫欲
Meaning
excessive or offensive sexual desire; lustfulness
Example
The novel depicted the lechery of corrupt nobles.
その小説は堕落した貴族の淫欲を描いていました。
C2 noun /dɪˈsɛnʃən/

dissension

意見の相違
Meaning
Strong disagreement or difference of opinion, especially leading to discord within a group.
Example
The meeting ended in dissension among the committee members.
会議は委員会メンバー間の意見の相違で終了しました。
C2 noun /rɪˈsɪdɪˌvɪzəm/

recidivism

Meaning
The tendency of a convicted criminal to reoffend or relapse into criminal behavior.
Example
The government introduced new programs to reduce recidivism among former inmates.
C2 noun /əbˈsɪdiən/

obsidian

オブシディアン (黒いガラスのような火山岩)
Meaning
A hard, dark, glasslike volcanic rock formed by rapid solidification of lava.
Example
The knife was made from sharp obsidian.
ナイフは鋭いオブシディアンで作られていた。
C2 verb /ɪkˈspɛktəreɪt/

expectorate

痰を吐く
Meaning
to cough up and spit out mucus from the throat or lungs
Example
The patient began to expectorate thick mucus.
患者は濃い粘液を吐き始めました。
C2 verb /əˈkuːtər/

accouter

装備する
Meaning
to equip or outfit, typically with military or ceremonial attire
Example
The soldiers were accoutered in full battle gear.
兵士たちは完全な戦闘装備を整えていた。
C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

直交
Meaning
at right angles; independent or unrelated
Example
In mathematics, two vectors are orthogonal if their dot product is zero.
数学では、2つのベクトルが直交している場合、そのドット積はゼロです。
C2 noun /ˌdɛspəˈrɑːdoʊ/

desperado

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

dissipation

浪費
Meaning
the process of disappearing or wasting; excessive indulgence in pleasure
Example
The dissipation of his fortune left him in poverty.
彼の財産の浪費は彼を貧困に追いやった。
C2 verb /ˈreə.rɪ.faɪ/

rarefy

薄くする, 精製する
Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
山に登るにつれて、空気は薄くなります。
C2 noun /laɪər/

lyre

ライアー
Meaning
a stringed musical instrument of ancient Greece
Example
The musician played a melody on the lyre.
ミュージシャンはライアーでメロディーを演奏しました。
C2 noun /ˈmɪsəleɪni/

miscellany

寄せ集め
Meaning
A collection or mixture of various things.
Example
The book is a miscellany of essays and poems.
その本はエッセイと詩の寄せ集めです。
C2 verb /məˈkadəˌmaɪz/

macadamize

砕石で道路を覆う
Meaning
to construct or cover a road with broken stone
Example
The government decided to macadamize the old rural roads.
政府は古い田舎道を砕石で覆うことを決定した。
C2 noun /ˈnɪk.næk/

knickknack

幸福
Meaning
A small decorative object, especially in a house.
Example
The shelf was full of little knickknacks collected from their travels.
彼女は賞を受け取ったとき、喜びを隠すことができませんでした。
C2 adjective /juːˈnɪsənənt/

unisonant

調和の取れた
Meaning
Sounding together or in harmony.
Example
The unisonant voices created a powerful effect.
調和の取れた声が強力な効果を生み出した。
C2 noun /prəˈpɪŋkwɪti/

propinquity

近接
Meaning
the state of being close to someone or something; proximity
Example
The propinquity of their houses made them close friends.
彼らの家の近接は、彼らを親しい友人にした。
C2 noun /ɪˈreɪdiəns/

irradiance

放射輝度
Meaning
the quality of shining brightly; the intensity of light falling on a surface
Example
The irradiance of the sun at noon was overwhelming.
正午の太陽の放射輝度は圧倒的でした。
C2 noun /ˈfɔːltˌfaɪndər/

faultfinder

欠点探し人
Meaning
a person who habitually finds fault with others
Example
He is such a faultfinder that nothing anyone does is ever good enough.
彼は欠点探し人で、誰かが何かをしても決して十分ではありません。
C2 noun /trænsˈluːsəns/

translucence

半透明性
Meaning
the quality of allowing light to pass through but not detailed shapes
Example
The translucence of the curtains filled the room with soft light.
カーテンの半透明性は部屋を柔らかい光で満たしました。
C2 noun /ˈʃaɪstər/

shyster

詐欺師
Meaning
a person, especially a lawyer, who uses unscrupulous or dishonest methods
Example
The businessman was exposed as a shyster who cheated clients.
そのビジネスマンは、顧客を騙す詐欺師として暴露されました。
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。
C2 verb /ˈhʊdwɪŋk/

hoodwink

だます
Meaning
To deceive or trick someone.
Example
The scammer hoodwinked many people with false promises.
詐欺師は嘘の約束で多くの人々をだました。
C2 noun /ˈveɪɡəri/

vagary

予測できない変化
Meaning
An unexpected and inexplicable change in a situation or someone's behavior.
Example
The vagaries of the weather made planning difficult.
天気の不規則な変化で計画が難しくなった。
C2 noun /ˈbrɪtɪˌsɪzəm/

briticism

イギリス英語の単語または特徴
Meaning
a word, phrase, or characteristic feature of British English
Example
The word 'lorry' is a well-known Briticism.
'lorry' という言葉はよく知られているブリティシズムです。
C2 verb /ɡɜːrd/

gird

帯びる
Meaning
to encircle with a belt or band; to prepare for action
Example
The knight girded his sword before battle.
騎士は戦闘の前に剣を帯びた。
C2 verb /əˈleɪ/

allay

和らげる
Meaning
to reduce the intensity of fear, worry, or pain; to calm
Example
The teacher tried to allay the students’ fears before the exam.
教師は試験前に生徒たちの恐怖を和らげようとしました。
C2 noun /ˈæn.əlz/

annals

年鑑
Meaning
Historical records of events, usually arranged chronologically.
Example
Her name will be remembered in the annals of science.
彼女の名前は科学の年鑑に記録されるだろう。