accelerate
All a b c d e f g h i j k l m n o p q r s t u v w x y z
All CEFR A1 A2 B1 B2 C1 C2
Content locale
EN 英語 BN ベンガル語 HI ヒンディー語 ES スペイン語 FR フランス語 DE ドイツ語 RU ロシア語 ZH 中国語 JA 日本語
All Vocabulary Cards All Vocabularies
B2 verb /əkˈsɛləreɪt/

accelerate

加速する
Meaning
to increase speed or make something happen sooner
Example
The driver accelerated to overtake the truck.
運転手はトラックを追い越すために加速しました。
C2 adjective /əˈluːviəl/

alluvial

沖積の
Meaning
Relating to or derived from alluvium (loose soil or sediment deposited by rivers).
Example
The farmers cultivate crops on the fertile alluvial plains.
農民たちは肥沃な沖積平原で作物を栽培します。
C2 noun /əˈluː.vi.əm/

alluvium

沖積土
Meaning
Fertile soil deposited by flowing water, especially in riverbanks.
Example
The alluvium in riverbanks is highly fertile for agriculture.
川の岸辺にあるアリューヴィウムは農業に非常に肥沃です。
C2 adjective, adverb /əˈbʌvˌbɔːrd/

aboveboard

正直でオープン
Meaning
Open and honest; without deception or trickery.
Example
The business deal was completely aboveboard.
ビジネス取引は完全に正直でオープンでした。
B1 noun /eɪdz/

aids

エイズ病
Meaning
Acquired Immune Deficiency Syndrome, a disease of the immune system caused by HIV
Example
AIDS is a major global health concern.
エイズは世界的な健康問題です。
B2 adjective ænˈtɪsɪpeɪtɪd

anticipated

予測された
Meaning
Expected or predicted to happen; foreseen in advance.
Example
The anticipated growth exceeded the city's capacity.
予測された成長は都市の容量を超えました。
B2 adjective; verb (past/participle) /əˈʃʊrd/

assured

確信している；自信のある
Meaning
confident and certain; guaranteed or made certain
Example
She felt assured that everything would work out.
彼女はすべてうまくいくと確信していた。
C1 noun /əˈstuːt.nəs/

astuteness

洞察力
Meaning
The ability to accurately assess situations or people and turn this to one's advantage.
Example
His astuteness helped in negotiations.
彼の洞察力は交渉で役立った。
C1 noun /ˌæmplɪfɪˈkeɪʃən/

amplification

増幅
Meaning
the act or process of making something stronger, louder, or more intense; an expansion or elaboration of details
Example
The microphone provides amplification of the speaker’s voice.
マイクは話者の声を増幅する。
A2 adverb /ˈæktʃuəli/

actually

実際に
Meaning
used to emphasize that something is true, especially when surprising
Example
She actually completed the project ahead of schedule.
彼女は実際に予定より早くプロジェクトを完了させた。
B1 adjective /ænˈtiːk/

Antique

アンティーク; 古い;
Meaning
old and valuable; belonging to ancient times
Example
She collected antique furniture from the Victorian era.
彼女はヴィクトリア時代のアンティーク家具を集めました。
C1 noun /ˌæntiˈklaɪmæks/

anticlimax

アンチクライマックス
Meaning
A disappointing end after a big build-up of excitement or expectation.
Example
The movie's ending was an anticlimax after such a thrilling story.
映画の終わりは、そんなにエキサイティングなストーリーの後のアンチクライマックスでした。
A1 pronoun /ˈɛnɪθɪŋ/

anything

何でも
Meaning
any object, event, or matter; whatever thing
Example
You can ask me anything about the project.
プロジェクトについて何でも聞いてください。
C1 noun /ænˈtæɡənɪzəm/

antagonism

対立
Meaning
active hostility or opposition
Example
There was clear antagonism between the two political parties.
二つの政党の間には明らかな対立があった。
A2 verb /əˈtækt/

attacked

攻撃した
Meaning
physically or verbally assaulted someone or something; launched an aggressive action against a target
Example
The soldiers attacked the enemy at dawn.
兵士たちは夜明けに敵を攻撃した。
C2 verb /əˈdʌltəreɪt/

adulterate

不正混入
Meaning
to make something poorer in quality by adding another substance, usually of lower quality
Example
The company was fined for adulterating its products with cheap chemicals.
その会社は安価な化学物質で製品をアダルテレートしたため、罰金を科せられました。
A1 conjunction /ænd/

and

と
Meaning
Used to connect words or sentences that are to be taken jointly.
Example
She bought apples and oranges.
彼女はリンゴとオレンジを買いました。
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。
B1 adverb /əˈsaɪd/

Aside

横に; 脇に; 主な部分から離れて
Meaning
to one side; apart; away from the main part
Example
Please set your book aside and listen to me.
本を脇に置いて、私の話を聞いてください。
A2 noun /əˈsɪstənt/

assistant

アシスタント
Meaning
a person who helps or supports another, often in a job
Example
She works as an assistant in a law firm.
彼女は法律事務所でアシスタントとして働いています。
B2 noun /ˈɑːr.tɪ.zən/

Artison

職人
Meaning
a skilled craftsperson who makes things by hand
Example
The artisan created a beautiful wooden sculpture.
職人は美しい木彫りの彫刻を作りました。
C2 adjective /əˈkɪliən/

achillean

アキレス的
Meaning
like or characteristic of Achilles; strong but vulnerable
Example
His achillean pride made him blind to danger.
彼のアキレス的な誇りは彼を危険に対して盲目にした。
C2 noun /əˌnʌn.siˈeɪ.ʃən/

annunciation

発表、良い知らせ
Meaning
The announcement of something; in Christianity, the announcement by the angel Gabriel to Mary that she would conceive Jesus.
Example
The church celebrated the Feast of the Annunciation with a special service.
教会は特別なサービスでアナンシエーションの祝祭を祝いました。
C1 verb /ˈeɪ.li.ə.neɪt/

alienate

疎外する
Meaning
To make someone feel isolated or estranged; to cause someone to become unfriendly.
Example
His rude behavior alienated many of his friends.
彼の失礼な行動は多くの友人を遠ざけた。
B2 verb /ˈæmplɪˌfaɪ/

amplify

増幅する
Meaning
to make sounds louder; to make something larger or more significant
Example
The microphone amplifies her voice.
マイクロフォンは彼女の声を増幅させます。
B2 verb /ˈænəlaɪz/

analyze

分析する
Meaning
to examine something in detail to understand it better or draw conclusions
Example
Scientists analyze data to discover new patterns.
科学者たちは新しいパターンを発見するためにデータを分析しています。
B1 noun /ˌæv.əˈkɑː.doʊ/

Avocado

アボカド
Meaning
a green pear-shaped fruit with creamy flesh and high fat content, often used in healthy diets
Example
Avocado is rich in healthy fats and is popular in salads and toast.
アボカドは健康に良い脂肪が豊富で、サラダやトーストに人気があります。
A1 noun /ˌæftərˈnuːn/

afternoon

午後
Meaning
The part of the day between noon and evening.
Example
We met in the afternoon for coffee.
私たちは午後にコーヒーを飲みに会いました。
A2 noun əˈɡriː.mənt

agreement

契約
Meaning
A negotiated arrangement between parties as to a course of action.
Example
The agreement was accepted by all countries.
その契約はすべての国によって受け入れられました。
C2 noun /ˈæntɪˌtʃeɪmbər/

antechamber

待合室
Meaning
a small room serving as an entry to a larger one
Example
The guests waited in the antechamber before being admitted to the hall.
ゲストはホールに入る前に待合室で待っていました。
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。
B2 verb /əˈbaɪd/

abide

従う
Meaning
to accept or act in accordance with; to endure; to dwell
Example
I will abide by the rules of the company.
私は会社のルールに従います。
C2 noun /ˌæntiˈsaɪkloʊn/

anticyclone

反気旋
Meaning
A weather system with high atmospheric pressure at its center, usually bringing calm and clear conditions.
Example
An anticyclone brought sunny weather across the region.
アンチサイクロンは地域全体に晴れた天気をもたらしました。
C1 adjective /ˌæntiˈneɪtl/

antenatal

産前
Meaning
Relating to the medical care and treatment given to a pregnant woman before the birth of her child.
Example
She attended regular antenatal checkups throughout her pregnancy.
彼女は妊娠中に定期的な産前検診を受けていました。
B2 adverb /əˈfek.ʃən.ət.li/

Affectionately

愛情を込めて
Meaning
in a way that shows feelings of liking or love; with fondness and care
Example
She hugged her grandmother affectionately.
彼女はおばあちゃんを愛情を込めて抱きしめました。
C1 adverb /əˈtroʊʃəsli/

atrociously

ひどく
Meaning
in a very cruel, shocking, or extremely bad manner
Example
The service at the restaurant was atrociously slow.
そのレストランのサービスはひどく遅かった。
B2 adjective /əkˈsel.ə.reɪ.tɪd/

accelerated

加速された
Meaning
Happening or developing faster than usual.
Example
The project progressed at an accelerated pace.
プロジェクトは加速したペースで進んでいった。
B2 noun /əˈsaɪləm/

asylum

亡命
Meaning
Protection or shelter, especially given to refugees or the mentally ill.
Example
The refugees sought asylum in the neighboring country.
難民は隣国で亡命を求めた。
B2 adjective /ˈæp.lɪ.kə.bəl/

applicable

適用可能
Meaning
Relevant or appropriate in a particular situation.
Example
This rule is applicable to eye care too.
このルールは目のケアにも適用されます。
C1 noun /ˈæntənɪm/

antonym

反意語
Meaning
A word opposite in meaning to another.
Example
‘Hot’ is the antonym of ‘cold’.
‘Hot’ は ‘cold’ の反意語です。
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。
C2 adjective /əˈkɜːrsɪd/

accursed

呪われた
Meaning
Doomed, detestable, or under a curse.
Example
The villagers avoided the accursed house on the hill.
村人たちは丘の上の呪われた家を避けていた。
C2 noun /ˈætəvɪzəm/

atavism

先祖返り
Meaning
The recurrence of traits or characteristics from a remote ancestor.
Example
The scientist noted atavism in the child’s physical features.
科学者は子供の身体的特徴に先祖返りを観察しました。
C1 noun /ˈækəleɪd/

accolade

栄誉
Meaning
An award, honor, or expression of praise.
Example
She received an accolade for her outstanding performance.
彼女は卓越したパフォーマンスで栄誉を受けました。
C2 noun /ˌænθrəpəˈsɛntrɪzəm/

anthropocentrism

人間中心主義
Meaning
The belief that human beings are the most important or central element of existence.
Example
Anthropocentrism often shapes environmental policies.
人間中心主義はしばしば環境政策を形作る。
B2 noun /ˌæl.əˈkeɪ.ʃən/

allocation

割り当て
Meaning
The action or process of distributing resources or duties for a particular purpose.
Example
Budget allocation for education must be increased.
教育のための予算の割り当ては増加しなければならない。
B2 verb /əˈvɜːrt/

avert

避ける
Meaning
to prevent something bad from happening or to turn away one's eyes or thoughts
Example
Quick action helped avert a disaster.
迅速な対応が災害を回避する手助けとなった。
B2 adjective /əˈtʃiːvəbl/

achievable

達成可能な
Meaning
Able to be brought about or reached successfully.
Example
Start with achievable steps to stay motivated.
達成可能なステップから始めて、モチベーションを保ちましょう。
B1 noun əˈreɪndʒmənt

arrangement

配置
Meaning
The way things are organized, positioned, or structured.
Example
The arrangement of protons in the nucleus is critical.
原子核内の陽子の配置は重要です。
C1 adjective /əˈθɔːrɪtətɪv/

authoritative

権威的な
Meaning
Having or showing authority; commanding and self-confident; reliable as a source of information.
Example
She spoke in an authoritative tone that silenced the room.
彼女は権威的な口調で話し、部屋を静かにさせた。
C2 adjective əˈsɪd.ju.əs

assiduous

勤勉な、熱心な
Meaning
Showing great care and perseverance; diligent and hardworking.
Example
His assiduous efforts led to a successful career.
彼の勤勉な努力は成功したキャリアにつながった。
C1 verb /əˈluːd/

allude

ほのめかす
Meaning
To refer to something indirectly or casually.
Example
The professor alluded to Shakespeare during the lecture.
教授は講義中にシェイクスピアに言及した。
B2 noun /ədˈmɪnɪstreɪtər/

administrator

Meaning
a person responsible for running or managing an organization or system
Example
The school administrator implemented new policies for students.
B2 noun /æmˈbæsədər/

Ambassador

大使
Meaning
an accredited diplomat sent by a country as its official representative to a foreign country
Example
The ambassador met with government officials to discuss trade agreements.
大使は貿易協定について議論するために政府の役人と会いました。
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 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。
B1 noun əˈses.mənt

assessment

評価
Meaning
The evaluation or estimation of the nature, quality, or ability of someone or something.
Example
The assessment process ensures fairness.
評価プロセスは公平性を確保します。
B2 noun /əˈsʌmpʃən/

Assumption

仮定
Meaning
a thing that is accepted as true without proof; a supposition
Example
His assumption about the weather proved to be wrong.
天気に関する彼の仮定は間違っていることが証明されました。
B2 adjective /ˌædvənˈteɪdʒəs/

Advantageous

有利な; 便利な; 利益を生む
Meaning
beneficial; favorable; profitable
Example
This position offers advantageous opportunities for career growth.
このポジションはキャリアの成長のための有利な機会を提供します。
C2 noun /əˈkriːʃən/

accretion

蓄積
Meaning
The process of growth or increase, typically by the gradual accumulation of additional layers or matter.
Example
The accretion of wealth allowed him to invest in various projects.
財産の蓄積により、彼はさまざまなプロジェクトへの投資を可能にした。
B2 adverb /ˈænjuəli/

annually

年次
Meaning
once every year; yearly
Example
The company holds a general meeting annually.
その会社は毎年年次総会を開きます。
A2 noun /əˈraɪvəl/

Arrival

到着; 到着の行為
Meaning
the action or process of arriving; the reaching of a destination
Example
The arrival of the train was delayed by two hours.
列車の到着は2時間遅れました。
C2 noun /əˈkjuːtnəs/

acuteness

鋭敏さ；深刻さ
Meaning
sharpness of mind or senses; severity or intensity of a condition
Example
Her acuteness allowed her to notice details others missed.
彼女の鋭敏さは他の人が見逃した細部に気づかせた。
B1 noun /ˈɑːrtwɜːrk/

artwork

アート作品
Meaning
a piece of art, such as a painting, sculpture, or drawing
Example
The gallery displayed an impressive artwork by a local artist.
ギャラリーは地元のアーティストによる印象的なアート作品を展示しました。
A2 noun /ˈæktrəs/

actress

女優
Meaning
a female performer in plays, movies, or television
Example
The actress looked stunning on the red carpet.
その女優は赤い絨毯の上で素晴らしく見えました。
C2 verb /əˈreɪn/

arraign

起訴する
Meaning
to formally accuse someone in a court of law and ask them to respond to the charges
Example
The suspect was arraigned before the judge this morning.
容疑者は今朝、裁判官の前で起訴されました。
B2 verb /əˈplɔːd/

applaud

拍手する
Meaning
to show approval by clapping or expressing admiration
Example
The audience applauded the performance.
観客はパフォーマンスに拍手を送りました。
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。
A2 verb (past tense / past participle) /əˈtræktɪd/

attracted

惹かれた
Meaning
felt interest or liking toward someone or something; was drawn by appeal or force
Example
She was attracted to the idea of studying abroad.
彼女は留学するという考えに惹かれた。
C2 adjective /əˈkwɪzətɪv/

acquisitive

Meaning
excessively interested in acquiring money or material things
Example
The acquisitive businessman bought every piece of land he could find.
C2 noun /ˈɔːlmənæk/

almanac

年鑑
Meaning
An annual publication containing calendars, weather forecasts, astronomical data, and other useful information.
Example
He consulted the almanac to check the phases of the moon.
彼は月の段階を確認するために年鑑を参照しました。
B2 noun /ˈɑːrtɪzən/

artisan

職人
Meaning
a skilled craftsperson who makes things by hand
Example
The artisan crafted a beautiful wooden chair.
職人は美しい木製の椅子を作りました。
C1 noun /əˈstrɑː.lə.dʒər/

Astrologer

占星術師
Meaning
a person who studies astrology and makes predictions based on the positions of stars and planets
Example
The astrologer predicted good fortune in her future.
その占星術師は、彼女の未来に良い運命があると予測しました。
C2 noun /əˈnæθəmə/

anathema

アナセマ / 嫌悪された物
Meaning
something or someone intensely disliked or strongly condemned
Example
Violence is anathema to her peaceful nature.
暴力は彼女の平和的な性格にはアナセマです。
B2 noun /ˌæljuˈmɪniəm/

aluminium

アルミニウム
Meaning
a lightweight, silvery-white metal used widely in manufacturing and packaging
Example
Aluminium is commonly used to make cans and aircraft parts.
アルミニウムは缶や飛行機の部品に使われます。
C1 adjective /ˈeɪmləs/

Aimless

無目的; 目標なし
Meaning
without purpose or direction; lacking a goal
Example
He wandered around the city in an aimless manner.
彼は無目的に街を歩いていた。
C1 noun /əˈdʒɪl.ɪ.ti/

agility

敏捷性
Meaning
Ability to work quickly and easily, both physically and mentally.
Example
Mental agility is essential for problem-solving.
問題解決には精神的な敏捷性が必要です。
C1 adjective, noun /əbˈzɔːrbənt/

absorbent

吸収性のある
Meaning
able to soak up liquid, moisture, or energy easily; a material or substance that absorbs
Example
This towel is highly absorbent and dries quickly.
このタオルはとても吸収性が高く、すぐ乾きます。
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。
B2 noun ˈænsɛstərz

Ancestors

先祖
Meaning
A person from whom one is descended; a forefather.
Example
The family tree shows the names of all ancestors.
家族の木はすべての先祖の名前を示しています。
B2 adjective /əˈbrʌpt/

abrupt

突然
Meaning
Sudden or unexpected, often without warning.
Example
The car came to an abrupt stop in the middle of the road.
車は道路の中央で急停車しました。
B1 noun /ˈeər fɔːrs/

Air force

空軍
Meaning
the military organization of a country that uses aircraft for fighting
Example
The air force conducted a training exercise over the mountains.
空軍は山脈の上で訓練演習を行った。
C2 adjective ˌeə.rəʊˈstæt.ɪk

aerostatic

気圧静的な
Meaning
Relating to or involving gases (especially air) in equilibrium and the equilibrium of balloons or aircraft under the influence of such gases.
Example
Aerostatic designs ensure stability at high altitudes.
エアロスタティックデザインは高高度での安定性を確保します。
C2 noun /ˈeɪʒən swɒmp iːl/

Asian swamp eel

アジアドジョウウナギ
Meaning
a snake-like freshwater fish that can survive in muddy waters and is considered a delicacy in South Asian cuisine
Example
Asian swamp eel can breathe air and survive in shallow muddy waters.
アジアドジョウウナギは空気を吸い、浅い泥の水で生き残ることができます。
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 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。
B2 noun /ˈæktɪvɪst/

activist

活動家
Meaning
A person who works to bring about social or political change.
Example
The activist organized a protest against pollution.
活動家は汚染に反対する抗議を組織しました。
C1 noun ˈælərdʒən

allergen

アレルギー反応を引き起こす物質
Meaning
A substance that causes an allergic reaction.
Example
Pollen is a common allergen that affects many people.
花粉は多くの人々に影響を与える一般的なアレルゲンです。
C2 adjective /ˌæktʃuˈɛəriəl/

actuarial

アクチュアリール
Meaning
Relating to actuaries or their work of analyzing financial risk and uncertainty, especially in insurance and pensions.
Example
The company relied on actuarial reports to set insurance premiums.
その会社は保険料を設定するためにアクチュアリール報告書に依存していた。
A1 preposition, conjunction, adverb /ˈæftər/

after

後
Meaning
in the time following an event or another action
Example
We went for ice cream after the movie.
映画の後にアイスクリームを食べに行った。
B2 adjective, noun /ədˈvaɪzəri/

advisory

アドバイザリー
Meaning
(adjective) having the power to give advice but not to make sure that it is followed; (noun) an official announcement containing information or a warning
Example
The committee serves in an advisory capacity to the board of directors.
委員会は取締役会にアドバイザリーの役割を果たしています。
A1 noun ækˈtɪv.ɪ.ti

Activities

活動
Meaning
A thing that a person or group does or has done.
Example
Productive activities drive progress.
生産的な活動は進展を促進します。
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。
C2 noun /ˈeə.rəm/

Arum

アラム
Meaning
a plant with large arrow-shaped leaves and a white spathe, also known as taro
Example
Arum leaves are commonly used in Bengali cuisine for cooking.
アラムの葉はインディア料理でよく使われます。
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 /ænˈtɪθəsɪs/

antithesis

アンチテーゼ
Meaning
A person, thing, or idea that is the direct opposite of another; a rhetorical device contrasting opposing ideas in parallel structure.
Example
Love is the antithesis of hate.
愛は憎しみのアンチテーゼです。
C1 noun /əˈtoʊnmənt/

atonement

贖罪
Meaning
the act of making amends for a wrong, sin, or injury
Example
The festival was celebrated as a day of atonement.
その祭りは贖罪の日として祝われました。
B2 adverb /ˈædɪkwətli/

adequately

適切に
Meaning
in a satisfactory manner
Example
He completed the task adequately, but could improve next time.
彼は適切に仕事を終えましたが、次回は改善できるでしょう。
C2 noun, verb /əˈfrʌnt/

affront

侮辱
Meaning
An action or remark that causes outrage or offense.
Example
He took her criticism as a personal affront.
彼は彼女の批判を個人的な侮辱と受け止めた。
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。
C2 verb /əˈkriːt/

accrete

蓄積する
Meaning
to grow or increase gradually by accumulation or addition
Example
Dust particles accrete over time to form larger celestial bodies.
塵の粒子は時間とともに集まって、より大きな天体を形成します。
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。
C2 noun /ˌækwəˈpɒnɪks/

aquaponics

アクアポニックス
Meaning
A system of aquaculture in which the waste produced by farmed fish or other aquatic animals supplies nutrients for plants grown hydroponically.
Example
Aquaponics efficiently utilizes water by integrating fish and plant farming.
アクアポニックスは魚と植物の農業を統合することによって水を効率的に利用します。
B2 noun /ɑːrtʃ/

arch

アーチ
Meaning
a curved symmetrical structure spanning an opening and typically supporting the weight above it
Example
The ancient arch still stands in the city center.
古代のアーチは今でも街の中心に立っています。
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。
C2 noun /ˈæbɪs/

abbess

アッベッサ (修道院の女性院長)
Meaning
the woman in charge of a convent of nuns
Example
The abbess welcomed the visitors to the convent.
アッベッサは修道院に訪問者を迎えました。
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。
C2 verb /əˈnɔɪnt/

anoint

油を塗る, 祝福する
Meaning
To smear or rub with oil, often as part of a religious ceremony or as a sign of consecration.
Example
The priest anointed the king with holy oil.
神父は聖油で王を塗りました。
B2 noun /əkˈnɒlɪdʒmənt/

acknowledgment

認識
Meaning
the act of accepting, admitting, or recognizing something
Example
He received an acknowledgment of his application.
彼は自分の申し込みの認識を受け取りました。
B2 noun ədˈvɜː.sɪ.ti

adversity

逆境
Meaning
Difficulties; misfortune; a difficult or unpleasant situation.
Example
He remained strong in the face of adversity.
彼は逆境に直面しても強さを保った。
C1 adjective /ˌæntiˈsleɪvəri/

antislavery

奴隷制度反対
Meaning
Opposed to the practice or system of slavery.
Example
The antislavery movement gained momentum in the 19th century.
奴隷制度反対運動は19世紀に勢いを増した。
A2 noun /əˈpɪə.rəns/

Appearance

外見; 出現; 表れ
Meaning
the way that someone or something looks; an act of performing or participating in a public event
Example
Her appearance at the event surprised everyone.
イベントでの彼女の登場は皆を驚かせた。
C2 noun /ˈɑːriə/

aria

ソロの歌唱曲
Meaning
a solo vocal piece with instrumental accompaniment, typically in an opera
Example
The soprano performed a moving aria during the second act.
ソプラノは第2幕で感動的なアリアを披露しました。
C2 noun /ˌɛərəˈstætɪks/

aerostatics

エアロスタティクス
Meaning
The branch of physics that deals with the equilibrium of air and gases and the forces acting on bodies in them.
Example
Aerostatics is essential for understanding how balloons float.
エアロスタティクスは、気球がどのように浮かぶかを理解するために不可欠です。
A2 adjective /əˈsliːp/

asleep

眠っている
Meaning
in a state of sleep
Example
The baby is fast asleep.
赤ちゃんはぐっすり眠っています。
B2 noun /əˈsɜːʃən/

assertion

主張
Meaning
a confident and forceful statement of fact or belief
Example
Her assertion that she was right was met with silence.
彼女の自分が正しいという主張は、沈黙とともに受け入れられました。
B2 adjective /əˈɡriːəbl/

Agreeable

快適な; 楽しい; 魅力的な; 同意する気持ち
Meaning
pleasant; enjoyable; delightful; willing to agree
Example
The weather is very agreeable today.
今日はとても快適な天気です。
B2 noun /ˈænθəm/

anthem

国歌
Meaning
A song that is identified with a particular group, movement, or nation, often expressing pride or unity.
Example
The national anthem was played before the football match.
サッカーの試合の前に国歌が演奏されました。
B2 adverb /ˌɑːrtɪˈfɪʃəli/

Artificially

人工的に;
Meaning
by artificial means; not naturally; in a fake manner
Example
The lake was artificially created for irrigation purposes.
その湖は灌漑目的で人工的に作られました。
C2 noun /ˈɑːr.bɪ.trɑːʒ/

arbitrage

アービトラージ
Meaning
The simultaneous buying and selling of securities in different markets to take advantage of differing prices.
Example
Investors use arbitrage to make profits in global markets.
投資家はアービトラージを利用してグローバル市場で利益を得ます。
C2 noun ˌæm.ɔː.tɪˈzeɪ.ʃən

amortization

償却
Meaning
The process of paying off debt with regular payments over time.
Example
The amortization schedule showed a 10-year repayment plan.
アモチゼーションスケジュールは10年間の返済計画を示しました。