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C1 verb /eɪl/

ail

病む
Meaning
to be ill or suffer from a physical or mental problem; to trouble or afflict
Example
She has been ailing since last winter.
彼女は去年の冬から病んでいます。
C1 noun /əˌsæsɪˈneɪʃən/

assassination

暗殺
Meaning
The act of killing someone important, often for political or ideological reasons.
Example
The assassination of the president shocked the nation.
大統領の暗殺は国全体を驚かせた。
C1 noun /əˈtaɪər/

attire

衣装
Meaning
Clothing, especially formal or elegant wear.
Example
She wore traditional attire at the wedding ceremony.
彼女は結婚式で伝統的な衣装を着ていた。
C1 adjective /ˌeɪsɪˈmɛtrɪkəl/

asymmetrical

非対称
Meaning
Having parts that are not the same in size, shape, or arrangement.
Example
She wore an asymmetrical dress that drew everyone’s attention.
彼女は非対称のドレスを着て、皆の注目を集めていた。
C1 adjective /ˌeɪsɪˈmɛtrɪk/

asymmetric

非対称
Meaning
Not having equal or corresponding parts; lacking symmetry.
Example
The design of the building is asymmetric and unusual.
その建物のデザインは非対称であり、珍しいです。
C1 verb əˈkruː

accrue

蓄積する
Meaning
To accumulate or receive (payments or benefits) over time.
Example
Interest accrues on the savings account every month.
毎月、貯金口座に利子が蓄積されます。
C1 noun /ədˈhiːʒən/

adhesion

付着
Meaning
the process or state of sticking to something
Example
Strong adhesion is needed for the tiles to stay in place.
タイルがその位置に留まるためには強い付着が必要です。
C1 noun /ˌænθrəˈpɒlədʒɪst/

anthropologist

人類学者
Meaning
a person who studies human societies, cultures, and their development
Example
The anthropologist spent years studying the tribal community.
人類学者は部族コミュニティを研究するのに何年も費やしました。
C1 adjective /ədˈmɪsəbl/

admissible

Meaning
acceptable or valid, especially as evidence in a court of law
Example
The judge ruled that the document was admissible as evidence.
C1 noun /ˈænərkɪst/

anarchist

アナーキスト
Meaning
a person who believes in or promotes the absence of government or authority
Example
The anarchist group protested against state control.
アナーキストのグループは国家の支配に反対して抗議しました。
C1 verb /əˈnʌl/

annul

取り消す
Meaning
to declare something legally invalid or cancel it
Example
The court decided to annul the marriage due to fraud.
裁判所は詐欺のために結婚を取り消すことを決定しました。
C1 verb /əˈsæsɪneɪt/

assassinate

暗殺
Meaning
To murder someone important, often a political or religious leader, usually by surprise attack.
Example
The rebels planned to assassinate the king.
反乱者たちは王を暗殺する計画を立てた。
C1 noun /ˌæntɪˈsiːdənt/

antecedent

先例
Meaning
something that came before; a previous event, condition, or cause
Example
The cultural antecedents of this festival go back centuries.
この祭りの文化的な先例は何世紀も前に遡ります。
C1 noun /əˈrɪs.tə.kræt/

Aristocrat

貴族; 高貴な血筋を持つ人
Meaning
a member of the aristocracy; a person of noble rank or birth
Example
The aristocrat lived in a magnificent castle.
そのアリストクラットは豪華な城に住んでいました。
C1 noun /ˈæmplɪtjuːd/

amplitude

振幅
Meaning
the maximum extent of a vibration or oscillation, or the size of something
Example
The amplitude of the earthquake was measured on the Richter scale.
地震の振幅はリヒター・スケールで測定されました。
C1 noun /əˈfɪn.ɪ.ti/

affinity

親近感
Meaning
A natural liking for or attraction to a person, thing, idea, etc.
Example
She has an affinity for classical music.
彼女はクラシック音楽に親近感を持っています。
C1 adjective /əˈniːmɪk/

anemic

貧血
Meaning
Suffering from anemia; lacking in vitality, strength, or color.
Example
The doctor prescribed iron supplements for her anemic condition.
医者は彼女の貧血状態のために鉄分補充剤を処方しました。
C1 adjective /ˈædʒɪteɪtɪd/

Agitated

動揺した; 不安な; 落ち着かない; 否定的に興奮した
Meaning
disturbed; anxious; restless; excited in a negative way
Example
He became agitated when he heard the bad news.
彼は悪いニュースを聞いて動揺した。
C1 noun /əˈkuːstɪks/

acoustics

音響学
Meaning
the science of sound, or the properties of a space that affect how sound is heard
Example
The hall’s excellent acoustics made the orchestra sound rich and clear.
ホールの優れた音響学により、オーケストラの音が豊かで明確に聞こえました。
C1 verb /əˈsɪm.ɪ.leɪt/

assimilate

完全に理解し吸収する; 知識や文化に統合する
Meaning
To take in and understand fully; to absorb and integrate into one's knowledge or culture.
Example
Immigrants often struggle to assimilate into a new culture.
移民はしばしば新しい文化に適応するのに苦労しています。
C1 adjective /ɔːˈtɒn.ə.məs/

autonomous

自律
Meaning
Acting independently or having the freedom to do so.
Example
Autonomous systems ensure greater precision.
自律システムはより高い精度を確保します。
C1 verb /əˈskraɪb/

ascribe

帰属する、割り当てる
Meaning
To attribute something to a cause, source, or person.
Example
Many scholars ascribe the poem to an unknown author.
多くの学者はこの詩を未知の作者に帰属させている。
C1 noun /əˈsæsɪn/

Assassin

暗殺者
Meaning
a person who murders an important person for political or religious reasons
Example
The president was protected from potential assassins by security guards.
大統領はセキュリティガードによって潜在的なアサシンから守られていた。
C1 adjective /ˈɔːrəl/

aural

聴覚の
Meaning
Relating to the ear or the sense of hearing.
Example
The lecture was an aural experience as well as an intellectual one.
講義は聴覚的な体験であり、知的な体験でもありました。
C1 noun /ˌædməˈnɪʃən/

admonition

警告
Meaning
a firm warning or reprimand; gentle or earnest advice
Example
He received an admonition for his careless work.
彼は不注意な仕事のために警告を受けました。
C1 adjective /ˈɔːbərn/

auburn

赤褐色
Meaning
reddish-brown in color, especially used to describe hair
Example
She has long auburn hair that shines in the sunlight.
彼女は長い赤褐色の髪を持っていて、日光の下で輝いています。
C1 verb /əbˈzɒlv/

absolve

解放する
Meaning
to free someone from blame, guilt, or responsibility; to pardon
Example
The priest absolved him of his sins.
牧師は彼を罪から解放した。
C1 noun /ˌɑːr.kəˈpɛl.əˌɡoʊ/

archipelago

群島
Meaning
A group of islands clustered together in a body of water.
Example
Indonesia is an archipelago with thousands of islands.
インドネシアは何千もの島々が集まった群島です。
C1 verb /ˈæn.ɛks/

annex

併合する
Meaning
To take control of a territory and add it to one's own.
Example
The empire annexed the neighboring kingdom after the war.
帝国は戦争後、隣国を併合した。
C1 adjective /ˈærəbəl/

arable

耕作可能
Meaning
suitable for growing crops or farming
Example
The farmer purchased arable land to expand his crops.
農家は作物を拡大するために耕作可能な土地を購入しました。
C1 noun /əˌtɜːni ˈdʒɛnərəl/

attorney-general

司法長官
Meaning
The chief legal officer of a state or country.
Example
The attorney-general announced new reforms to strengthen justice.
司法長官は司法の強化のための新しい改革を発表しました。
C1 noun /ˈæmpɛər/

ampere

アンペア
Meaning
A unit of electric current in the International System of Units (SI), symbolized as A.
Example
The current flowing through the wire is measured in amperes.
ワイヤーを流れる電流はアンペアで測定されます。
C1 adjective /æbˈdɑː.mə.nəl/

abdominal

腹部の
Meaning
relating to the abdomen (the part of the body between the chest and pelvis)
Example
He complained of severe abdominal pain.
彼はひどい腹痛を訴えていました。
C1 noun əˈrɪd.ɪ.ti

aridity

干ばつ
Meaning
The state of being extremely dry, especially having insufficient rainfall to support vegetation.
Example
The aridity of the land is increasing due to climate change.
気候変動の影響で土地の干ばつが進行しています。
C1 verb /əˈvɛndʒ/

avenge

復讐する
Meaning
to inflict harm in return for an injury or wrong done to oneself or another
Example
He vowed to avenge his brother's death.
彼は兄の死を復讐することを誓った。
C1 verb /ˌæprɪˈhɛnd/

apprehend

逮捕する
Meaning
to arrest or seize someone; to understand or perceive something
Example
The police managed to apprehend the thief after a long chase.
警察は長い追跡の後、泥棒を捕まえることに成功した。
C1 verb /əˈdʒɜrn/

adjourn

延期する
Meaning
to suspend a meeting or session to another time or place
Example
The judge decided to adjourn the hearing until next week.
裁判官は次の週まで聴聞を延期することに決めました。
C1 noun /ˈæltoʊ/

alto

アルト (成人の歌声)
Meaning
the second highest adult singing voice, between soprano and tenor
Example
She sang the alto part in the choir beautifully.
彼女は合唱団でアルトパートを美しく歌いました。
C1 noun /ˈænti ˈeəkræft ɡʌn/

Anti-aircraft-gun

対空砲
Meaning
a weapon designed to attack aircraft from the ground
Example
The anti-aircraft gun was positioned to defend the military base.
対空砲は軍事基地を守るために配置されました。
C1 verb /əˈfɪks/

affix

貼り付ける / 取り付ける
Meaning
to attach or stick something firmly to another thing
Example
Please affix the stamp to the envelope.
切手を封筒に貼ってください。
C1 adverb /əˈlɒft/

aloft

高く
Meaning
Up in or into the air; overhead.
Example
The kite was flying aloft in the clear sky.
凧は晴れた空に高く飛んでいた。
C1 noun /əˈbreɪʒən/

abrasion

摩擦による皮膚または表面の擦り傷または摩耗
Meaning
a scrape or wearing away of the skin or surface due to friction
Example
He suffered a minor abrasion on his knee after falling.
彼は転倒後、膝に軽い擦り傷を負いました。
C1 adjective /əˈvɜːrs/

averse

嫌悪
Meaning
having a strong dislike of or opposition to something
Example
He was averse to taking unnecessary risks.
彼は不必要なリスクを取ることに嫌悪感を抱いていた。
C1 noun /ˌædəˈreɪʃən/

adoration

崇拝 / 深い愛
Meaning
deep love and respect; worship
Example
The fans showed their adoration for the singer.
ファンは歌手に対して自分の愛情を示した。
C1 noun /ədˈmɪtəns/

admittance

入場
Meaning
the process or fact of entering or being allowed to enter a place
Example
No admittance without a valid ticket.
有効なチケットなしでは入場できません。
C1 noun /ˈæftərˌθɔːt/

afterthought

Meaning
Something added or considered later than originally planned.
Example
The gift seemed like an afterthought rather than a genuine gesture.
C1 noun əˌsɪm.ɪˈleɪ.ʃən

Assimilation

同化
Meaning
Connecting new information with existing knowledge
Example
Proper assimilation of knowledge leads to effective learning.
知識の適切な同化は効果的な学習につながります。
C1 verb /əˈdɔːrn/

adorn

飾る
Meaning
to decorate or add beauty to something
Example
The hall was adorned with flowers for the wedding.
結婚式のためにホールは花で飾られました。
C1 adjective ˌæɡrɪˈkʌltʃərəli sɪɡˈnɪfɪkənt

agriculturally significant

農業に関連する重要な
Meaning
Important or crucial related to farming and agriculture
Example
Winter is agriculturally significant for crop production.
冬は作物生産にとって農業に関連する重要な時期です。
C1 adjective /ˌæpəˈθɛtɪk/

apathetic

Meaning
showing or feeling little or no interest, enthusiasm, or concern
Example
He was apathetic about the outcome of the match.
C1 adjective ˌæd.vɚˈser.i.əl

adversarial

対立的な
Meaning
Involving or characterized by conflict or opposition.
Example
The two companies have an adversarial relationship in the market.
その二つの会社は市場で対立的な関係を持っている。
C1 noun /ˈælkoʊv/

alcove

アルコーブ
Meaning
A small recessed section of a room or a nook.
Example
She placed a reading chair in the alcove near the window.
彼女は窓の近くのアルコーブに読書用の椅子を置きました。
C1 adjective /əˈdɒptɪv/

adoptive

養子の
Meaning
relating to the adoption of a child or the act of taking something as one’s own
Example
She grew up in a loving adoptive family.
彼女は愛情深い養子の家族で育った。
C1 preposition /əˈtɒp/

atop

上に
Meaning
on the top of something
Example
A flag was placed atop the tower.
旗は塔の上に置かれました。
C1 adjective /əˈlʊr.ɪŋ/

Alluring

魅力的で誘惑的; 魅力的な
Meaning
attractive and tempting; fascinating
Example
The alluring fragrance of roses filled the garden.
バラの魅力的な香りが庭を満たしました。
C1 noun ˌæmbɪˈɡjuːɪti

ambiguity

曖昧さ, 不明確さ
Meaning
The quality of being open to more than one interpretation; inexactness.
Example
The ambiguity of the statement caused confusion among the team.
その声明の曖昧さはチームの間で混乱を引き起こしました。
C1 noun /ˌæɡ.rəˈveɪ.ʃən/

aggravation

悪化, 増悪
Meaning
The act of making a situation worse or the state of being worsened.
Example
The delay caused great aggravation for the passengers.
遅延は乗客に大きな不快感を引き起こしました。
C1 adjective /ˈæmərəs/

amorous

情熱的
Meaning
Showing, feeling, or relating to romantic love or desire.
Example
He sent her an amorous letter filled with declarations of love.
彼は愛の宣言でいっぱいのアモロスな手紙を彼女に送った。
C1 noun /ˌeɪ.li.əˈneɪ.ʃən/

alienation

疎外
Meaning
The state of being isolated or estranged from a group or activity.
Example
The new policies created a sense of alienation among employees.
新しい政策は従業員の間に疎外感を生み出しました。
C1 noun /ˈælkəmi/

alchemy

錬金術
Meaning
A medieval practice combining elements of chemistry and philosophy, aimed at transforming matter, especially turning base metals into gold.
Example
Medieval scientists devoted their lives to alchemy.
中世の科学者たちは命を錬金術に捧げました。
C1 verb ɔːɡˈmɛntɪŋ

augmenting

増加する
Meaning
Increasing; making something greater in size, number, or degree
Example
Life expectancy is augmenting with advancements in healthcare.
医療の進歩により、平均寿命は増加しています。
C1 noun /ˈɑːrdər/

ardor

情熱、熱意
Meaning
Great enthusiasm or passion.
Example
She spoke with ardor about her new project.
彼女は新しいプロジェクトについて情熱をもって話していました。
C1 noun ˈæ.sɛt ˌæl.əˈkeɪ.ʃən

asset allocation

資産配分
Meaning
An investment strategy that aims to balance risk and reward by apportioning a portfolio's assets according to an individual's goals, risk tolerance, and investment horizon.
Example
Proper asset allocation is key to financial growth.
正しい資産配分は、金融成長の鍵です。
C1 noun /ˌæntɪˈsiːdənts/

antecedents

先例
Meaning
previous events, conditions, or people that influence or serve as a basis for something that follows
Example
The lawyer examined the criminal antecedents of the suspect.
弁護士は容疑者の犯罪歴を調べました。
C1 adjective /əˈbaɪdɪŋ/

abiding

持続的な
Meaning
lasting for a long time; enduring
Example
She had an abiding love for her hometown.
彼女は故郷への持続的な愛を持っていました。
C1 noun əˈpreɪ.zəl

appraisal

評価
Meaning
An assessment or evaluation of performance or quality.
Example
The annual appraisal determines salary increments.
年間の評価は給与の増加を決定します。
C1 noun /ˌætəˈʃeɪ/

attache

外交官補
Meaning
A person officially assigned to the staff of a diplomatic mission, often with a specific area of responsibility.
Example
The cultural attache organized an art exhibition in the embassy.
文化担当のアタッシェが大使館で芸術展を開催しました。
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 verb ˌæs.ɚˈteɪn

ascertain

確認する
Meaning
To find out or discover something with certainty; to verify.
Example
The police tried to ascertain the cause of the accident.
警察は事故の原因を確認しようとしました。
C1 noun /ˌænəlˈdʒiːzɪk/

analgesic

鎮痛剤
Meaning
A drug or substance that relieves pain.
Example
She took an analgesic to ease her headache.
彼女は頭痛を和らげるために鎮痛剤を飲みました。
C1 noun /ˈæntlɚ/

antler

鹿の角
Meaning
The branched horns on the head of a deer or similar animal, usually shed and regrown annually.
Example
The deer’s antlers grew larger each year.
鹿の角は毎年大きくなります。
C1 noun /ədˈhɪə.rəns/

adherence

遵守
Meaning
The practice of following or keeping to a rule, standard, or belief.
Example
Adherence to rules is crucial in any organization.
規則を遵守することは、どの組織においても重要です。
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 noun ˌæɡ.rəʊˈkem.ɪ.kəl

agrochemical

農業化学物質
Meaning
A chemical product used in agriculture, especially a pesticide or fertilizer.
Example
Excessive use of agrochemicals can degrade soil quality.
過度なアグロケミカルの使用は土壌の質を低下させる可能性があります。
C1 noun /ˈæpərtʃər/

aperture

開口部 / 穴
Meaning
an opening, hole, or gap, especially one that lets in light
Example
Light entered through the small aperture in the wall.
光は壁の小さな開口部を通って入った。
C1 verb /ˈæn.ə.teɪt/

annotate

注釈を加える
Meaning
to add notes or comments to a text, diagram, or document for explanation or clarification
Example
The teacher asked the students to annotate the poem with their interpretations.
先生は学生に詩を解釈して注釈をつけるように頼みました。
C1 noun ɔːˈstɛr.ɪ.ti

austerity

緊縮
Meaning
Simple and disciplined lifestyle, avoiding luxury.
Example
The government implemented austerity measures to reduce expenses.
政府は支出を削減するために緊縮策を実施した。
C1 adjective /ˌeɪpəˈlɪtɪkəl/

apolitical

政治的でない
Meaning
not interested in or not connected with politics
Example
She prefers to stay apolitical and focus on her work.
彼女は政治的でない態度を保ち、仕事に集中することを好みます。
C1 noun /əˈsɪdɪti/

acidity

酸性度
Meaning
the quality or degree of being acidic; the amount of acid present in a substance
Example
The acidity of the soil affects how well crops grow.
土壌の酸性度は作物の成長に影響する。
C1 noun /əˈpɒlədʒɪst/

apologist

擁護者
Meaning
a person who defends or justifies something, often a controversial belief or institution
Example
He is known as an apologist for authoritarian regimes.
彼は権威主義的な政権の擁護者として知られています。
C1 adjective /əˈfɜːrmətɪv/

affirmative

肯定的
Meaning
expressing agreement, approval, or a positive response
Example
She gave an affirmative answer to the proposal.
彼女は提案に対して肯定的な回答をしました。
C1 adverb /ˈeɪ.mi.ə.bli/

Amiably

友好的に, 親切に
Meaning
in a friendly and pleasant manner
Example
They discussed the issue amiably without any arguments.
彼らは議論を交わすことなく、友好的にその問題を話し合った。
C1 verb /əˈlɒt/

allot

幸せ
Meaning
to give or assign something, often a share or portion, to someone
Example
Each student was allotted ten minutes to present.
彼女は賞を受け取ったとき、幸福を隠すことができませんでした。
C1 verb /ɔːɡˈmɛnt/

augment

増加させる
Meaning
To increase or strengthen something.
Example
The company plans to augment its workforce.
会社は労働力を増加させる計画を立てています。
C1 adjective /əˈpriː.ʃə.bəl/

Appreciable

顕著な; 重要な; 数量的にかなり
Meaning
noticeable; significant; considerable in amount
Example
There was an appreciable improvement in his test scores.
テストのスコアに顕著な改善が見られました。
C1 adjective /ˌeɪˈmɔːrəl/

amoral

アモラル
Meaning
Lacking a moral sense; unconcerned with rightness or wrongness of something.
Example
The character in the novel was portrayed as completely amoral.
小説の登場人物は完全にアモラルとして描かれた。
C1 adjective /ˈæv.ɪd/

avid

熱心な
Meaning
having an eager desire or enthusiasm for something
Example
She is an avid reader of mystery novels.
彼女はミステリー小説の熱心な読者です。
C1 noun əˈniː.mi.ə

anemia

貧血
Meaning
A condition in which there is a deficiency of red blood cells or hemoglobin in the blood.
Example
Genetic therapy addresses anemia effectively.
遺伝子治療は貧血を効果的に治療します。
C1 verb /ˈæmbʊʃ/

ambush

待ち伏せする
Meaning
To attack suddenly and unexpectedly from a hidden position.
Example
The soldiers planned to ambush the enemy at dawn.
兵士たちは夜明けに敵を待ち伏せする計画を立てた。
C1 adjective /əˈwɒʃ/

awash

水浸し
Meaning
covered or flooded with water or something in large quantities
Example
The market was awash with cheap imported goods.
市場は安価な輸入品で水浸しだった。
C1 noun ˌɔːɡ.menˈteɪ.ʃən

augmentation

増加または拡張
Meaning
Increasing quantity, power or performance.
Example
The company invested in the augmentation of its workforce.
その会社は労働力の増強に投資しました。
C1 adjective /ˌeɪ.bəlˈbɒd.id/

able-bodied

健康な体
Meaning
physically strong and healthy, not disabled
Example
The company is looking for able-bodied workers for the construction site.
その会社は建設現場のために健康な体を持つ労働者を探しています。
C1 noun əˈtrɒs.ɪ.tiz

atrocities

残虐行為
Meaning
Extremely wicked or cruel acts, typically involving physical violence or injury.
Example
The atrocities shocked the international community.
その残虐行為は国際社会を震撼させた。
C1 noun /ˈæl.kə.laɪ/

alkali

アルカリ性物質
Meaning
a soluble base substance, typically with a pH greater than 7, that neutralizes acids
Example
Soap contains alkali which helps remove grease.
石鹸にはアルカリ性物質が含まれており、油を取り除くのに役立ちます。
C1 adjective /ˈæŋ.ɡjə.lər/

Angular

角度的な
Meaning
having sharp corners or edges; relating to angles
Example
The building has an angular design with sharp corners.
その建物は鋭い角を持つ角度的なデザインです。
C1 adjective ˈeɪlɪəneɪtɪd

alienated

疎外された
Meaning
Feeling isolated or estranged; disconnected from others or society.
Example
Alienated students are more prone to delinquency.
疎外された学生は、犯罪に走りがちです。
C1 noun /ˈælɔɪ/

alloy

合金
Meaning
A mixture of metals or a metal combined with another element.
Example
Bronze is an alloy of copper and tin.
ブロンズは銅とスズの合金です。
C1 noun /ˈɑː.kɪ.taɪp/

archetype

原型、典型
Meaning
A very typical example of a certain person or thing; an original model or prototype.
Example
This painting is the archetype of modern art.
この絵は現代アートの原型です。
C1 noun əˌkred.ɪˈteɪ.ʃən

accreditation

認定
Meaning
The action or process of officially recognizing someone or something as having a particular status or being qualified to perform a particular activity.
Example
Accreditation ensures institutional credibility.
認定は組織の信頼性を保証します。
C1 verb /əˈlʊər/

allure

魅力
Meaning
to attract or tempt someone with something desirable; to entice
Example
The beautiful garden allured visitors from far away.
美しい庭園が遠くから訪問者を魅了しました。
C1 noun /ˌæbəˈrɪdʒəniːz/

aborigines

アボリジニ
Meaning
The original inhabitants of a land, especially in Australia.
Example
The aborigines have preserved their traditions for thousands of years.
アボリジニーズは何千年もの間、彼らの伝統を守り続けてきました。
C1 adjective /əˈrɛstɪŋ/

arresting

魅力的な
Meaning
Attracting attention in a striking or impressive way.
Example
The actress gave an arresting performance.
女優は魅力的な演技をしました。
C1 adjective /æmˈbɪvələnt/

ambivalent

相反する
Meaning
Having mixed or contradictory feelings about something or someone.
Example
She was ambivalent about accepting the new job offer.
彼女は新しい仕事のオファーを受け入れることに対してアンビヴァレントだった。
C1 noun /ˈæmfɪˌθiətər/

amphitheater

円形劇場
Meaning
A large open circular or oval building with rising tiers of seats, used for public events.
Example
The concert was held in an ancient amphitheater.
コンサートは古代の円形劇場で行われました。
C1 noun /ˈæd.vənt/

advent

到来
Meaning
The arrival of a notable person, thing, or event.
Example
The advent of the internet changed the way people communicate.
インターネットの到来は人々のコミュニケーション方法を変えました。
C1 noun /əˈtjuːn.mənt/

attunement

調和
Meaning
Being in harmony or responsive to someone's emotional state.
Example
Attunement to emotions improves relationships.
感情への調和は関係を改善する。
C1 adjective /əˈɡrɛəriən/

agrarian

農業的
Meaning
Related to farming, agriculture, or rural land.
Example
The country’s economy is still largely agrarian.
その国の経済はまだ主に農業的です。
C1 noun /ɔːˈdæs.ə.ti/

audacity

大胆さ
Meaning
The willingness to take bold risks; boldness or fearlessness.
Example
His audacity to question authority was admirable.
権威に異議を唱える彼の大胆さは賞賛に値した。
C1 noun ˌeə.rəʊ.daɪˈnæm.ɪks

aerodynamics

Meaning
The study of the properties of moving air and the interaction between the air and solid bodies moving through it.
Example
The aerodynamics of an aircraft determines its speed and efficiency.
C1 adjective /əˈmiːnəbl/

amenable

協力的
Meaning
willing to cooperate or be influenced; open to suggestions
Example
She was amenable to the idea of working longer hours.
彼女は長時間働くという考えに賛成だった。
C1 noun /əˈvɜːrʒən/

aversion

嫌悪
Meaning
a strong feeling of dislike or unwillingness towards something
Example
She has a strong aversion to smoking.
彼女は喫煙に強い嫌悪感を持っています。
C1 adjective /ˈɔː.də.bəl/

Audible

聞こえる
Meaning
able to be heard; loud enough to hear
Example
The speaker's voice was barely audible from the back of the large hall.
スピーカーの声は大きなホールの後ろからほとんど聞こえませんでした。
C1 verb /əˈtɛst/

attest

証明する
Meaning
To provide or serve as clear evidence of; to confirm or certify the truth of something.
Example
The witness attested to the accuracy of the report.
証人は報告書の正確さを証明しました。
C1 verb /əˈkleɪm/

acclaim

称賛する
Meaning
to praise enthusiastically and publicly
Example
The audience acclaimed the actor for his outstanding performance.
観客はその俳優の素晴らしい演技に喝采を送った。
C1 adverb /əˈbrɛst/

abreast

並んで
Meaning
side by side and facing the same direction; informed about something
Example
The soldiers marched two abreast down the street.
兵士たちは通りを二人並んで行進した。
C1 verb /ænˈtæɡənaɪz/

antagonize

挑発する
Meaning
to cause someone to become hostile or angry; to provoke opposition
Example
His rude remarks only served to antagonize his colleagues.
彼の失礼な言葉は彼の同僚をアンタゴナイズすることにしかならなかった。
C1 adjective /əˈsɛndənt/

ascendant

上昇する、支配的な
Meaning
Rising in power or influence; dominant.
Example
She is an ascendant leader in the political party.
彼女は政治党の中で上昇するリーダーです。
C1 noun əbˈzɔːrp.ʃən

absorption

吸収
Meaning
The process or action by which one thing absorbs or is absorbed by another.
Example
Plants help in the absorption of carbon dioxide.
植物は二酸化炭素の吸収を助けます。
C1 noun, verb /ˈɔːtɒpsi/

autopsy

検死
Meaning
a post-mortem examination to discover the cause of death or the extent of disease
Example
The autopsy revealed that the victim had died from poisoning.
検死は、犠牲者が中毒で亡くなったことを明らかにしました。
C1 noun ˈæk.si.əm

axiom

公理
Meaning
A statement or principle that is considered true and does not require proof.
Example
Actions speak louder than words is a well-known axiom.
行動は言葉よりも雄弁である、それはよく知られた公理です。
C1 adjective /ˈæʃən/

ashen

青白い
Meaning
Very pale in appearance, often due to shock, fear, or illness.
Example
His face turned ashen when he heard the terrible news.
彼は恐ろしいニュースを聞いたとき、顔が青白くなった。