B1 noun /ˈɪnsɪdənt/

incident

インシデント

Meaning

an event or occurrence, often unpleasant or unusual

Example

The police quickly responded to the incident in the park.

警察は公園でのインシデントに迅速に対応しました。

C1 noun /ɪnˈdʌstriəsnəs/

industriousness

勤勉

Meaning

The quality of being hardworking and diligent.

Example

His industriousness earned him a promotion at work.

彼の勤勉さは、仕事で昇進をもたらしました。

B1 noun /ɪnˈɡriːdiənt/

ingredient

材料

Meaning

A component part or element of something, especially in a recipe.

Example

Flour is a key ingredient in baking bread.

小麦粉はパン作りにおける重要な材料です。

C1 adjective /ɪˈrɛvərənt/

irreverent

不敬な

Meaning

showing a lack of respect for people or things that are usually respected

Example

The comedian’s irreverent jokes offended some of the audience.

コメディアンの不敬なジョークは、観客の一部を不快にさせた。

C2 conjunction /ˌɪnəzˈmʌtʃ æz/

inasmuch-as

なぜなら

Meaning

Because; since.

Example

He cannot attend, inasmuch as he is unwell.

彼は出席できません、なぜなら彼は病気だからです。

B2 verb /ɪnˈhæbɪt/

inhabit

住む

Meaning

to live in; to occupy as a dwelling

Example

Many animals inhabit the forest.

多くの動物が森に住んでいます。

A2 noun /ɪŋk/

Ink

インク

Meaning

a colored fluid used for writing, drawing, or printing; a dark liquid ejected by cuttlefish

Example

The old fountain pen leaked ink all over his white shirt during the meeting.

古い万年筆は会議中に白いシャツにインクをこぼしました。

B1 noun /ˈɪnpʊt/

input

入力、提供された情報

Meaning

information, advice, or data that is put into a system, device, or process

Example

The manager asked for everyone's input on the new project.

マネージャーは新しいプロジェクトに対する全員のインプットを求めました。

A2 verb /ɪnˈkluːd/

include

含む

Meaning

to have as part of a whole; to contain or comprise

Example

The price includes all taxes.

価格にはすべての税金が含まれています。

B1 noun /ɪnˈstrʌkʃənz/

instructions

指示

Meaning

Detailed information on how something should be done or operated.

Example

Please follow the instructions on the box.

箱に書かれた指示に従ってください。

C2 adverb /ɪnˈdjuːbɪtəbli/

indubitably

疑いなく

Meaning

Without a doubt; certainly.

Example

She is indubitably the best candidate for the job.

彼女は疑いなくその仕事の最良の候補者です。

C1 noun ˌɪndɪˈspensəbl̩ ˈkɒmpɪtənsi

indispensable competency

不可欠な能力

Meaning

Essential skill or ability that cannot be done without; a crucial capability that is absolutely necessary.

Example

Digital literacy is an indispensable competency in the 21st century.

デジタルリテラシーは21世紀のインディスペンセブルなコンピテンスです。

C1 verb /ˈɪtəreɪt/

iterate

反復する

Meaning

To repeat a process or statement, often to improve or refine.

Example

The software team will iterate the design until it meets user needs.

ソフトウェアチームは、ユーザーのニーズを満たすまでデザインを繰り返します。

B2 verb /ɪnˈflɪkt/

inflict

加える

Meaning

to cause something unpleasant or painful to be suffered by someone or something

Example

The storm inflicted considerable damage to the city.

嵐は都市にかなりの被害を与えました。

B2 verb /ɪnˈkɔːrpəreɪt/

incorporate

組み込む

Meaning

to include something as part of a whole; to form a corporation

Example

The new design incorporates advanced technology.

新しいデザインは先進技術を組み込みます。

C2 noun /ˌɪnədˈvɜːrtəns/

inadvertence

不注意

Meaning

Failure to pay attention; carelessness.

Example

The error happened through sheer inadvertence.

エラーは単なる不注意で発生しました。

C1 adjective /ɪnˈtræk.tə.bəl/

intractable

管理不能

Meaning

Difficult or impossible to manage, control, or solve.

Example

The conflict has become an intractable problem.

その対立は管理不能な問題になった。

C1 noun /ˌɪn.səˌbɔːr.dɪˈneɪ.ʃən/

insubordination

反抗

Meaning

Defiance of authority; refusal to obey orders.

Example

The soldier was punished for insubordination during the mission.

その兵士はミッション中の反抗で罰せられました。

C1 adjective /ɪmˈpɛndɪŋ/

impending

差し迫った

Meaning

about to happen soon, usually something unpleasant or threatening

Example

The villagers were worried about the impending flood.

村人たちは差し迫った洪水を心配していた。

C2 adjective /ɪˈlɪmɪtəbl/

illimitable

無限

Meaning

Without limits or bounds.

Example

The universe is often described as illimitable.

宇宙はしばしば無限であると説明されます。

A2 verb /ɪɡˈnɔːr/

ignore

無視する

Meaning

to refuse to take notice of; to disregard intentionally

Example

She decided to ignore the rude comments.

彼女は失礼なコメントを無視することに決めました。

C2 verb /ɜːrk/

irk

苛立たせる

Meaning

to annoy or irritate someone

Example

It irks me when people are late without calling.

人々が電話をかけずに遅れると、私はイライラします。

C1 adjective /ɪnˈdʒʊəriəs/

injurious

有害な

Meaning

Causing or likely to cause harm or damage.

Example

Smoking is injurious to health.

喫煙は健康に有害です。

A2 noun /ˈaɪ.lənd/

Island

島

Meaning

a piece of land completely surrounded by water

Example

We visited a beautiful island during our vacation.

私たちは休暇中に美しい島を訪れました。

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。

C1 noun ɪnˈdʌldʒəns

indulgence

嗜好

Meaning

The practice of allowing oneself to enjoy the pleasure of something.

Example

His indulgence in junk food affected his health.

彼のジャンクフードへの過度の嗜好は健康を害した。

B2 noun /ɪnˈhæbɪtənt/

inhabitant

住民

Meaning

a person or animal that lives in a particular place

Example

The inhabitants of the village rely on farming for their livelihood.

村の住民は生活のために農業に頼っています。

A2 verb /ɪnˈvaɪtɪd/

invited

招待された

Meaning

asked someone formally or politely to go somewhere or do something

Example

She was invited to the party.

彼女はパーティーに招待された。

C1 adjective ˌɪn.trəˈspek.tɪv

introspective

内省的

Meaning

Characterized by or given to introspection; examining one's own thoughts and feelings.

Example

Writers tend to be highly introspective individuals.

作家はしばしば非常に内省的な人々である。

B2 verb /ˈɪmɪɡreɪt/

immigrate

移住する

Meaning

to come to live permanently in a foreign country

Example

He immigrated to Canada five years ago.

彼は5年前にカナダに移住しました。

C1 adjective /ɪnˈveɪsɪv/

invasive

侵襲的

Meaning

Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.

Example

The doctor explained that the procedure was minimally invasive.

医者は、その手順が最小限の侵襲的であることを説明しました。

C1 adjective /ɪnˈseɪʃəbl̩/

insatiable

満たされない

Meaning

impossible to satisfy; always wanting more

Example

Her insatiable curiosity drove her to read every book in the library.

彼女の満たされない好奇心は、図書館のすべての本を読むように彼女を駆り立てた。

A1 noun /aɪs/

Ice

氷

Meaning

water that has frozen and become solid

Example

The ice in my drink melted quickly in the hot weather.

私の飲み物の氷は暑い天気で素早く溶けました。

C1 verb /ɪnˈhɪbɪt/

inhibit

抑制する

Meaning

to prevent or restrain someone or something from acting freely; to hinder

Example

Fear can inhibit personal growth.

恐怖は個人の成長を抑制する可能性があります。

C2 adjective /ɪnˈɡlɔːriəs/

inglorious

不名誉な

Meaning

Causing shame or disgrace; not bringing honor or glory.

Example

The army suffered an inglorious defeat.

軍隊は不名誉な敗北を喫した。

C2 adjective /ɪˈnɪm.ɪ.tə.bəl/

inimitable

比類のない

Meaning

So good or unusual as to be impossible to copy; unique.

Example

His inimitable writing style made him a literary legend.

彼の比類のない筆致が彼を文学の伝説にした。

B2 adjective /ˌɪntəˈpɜːsənl/

interpersonal

対人

Meaning

Relating to relationships or communication between people.

Example

He has excellent interpersonal skills and gets along well with others.

彼は優れた対人スキルを持っており、他の人とうまくやっていきます。

B2 adjective /ˌɪnsɪɡˈnɪfɪkənt/

insignificant

重要でない

Meaning

Too small or unimportant to be worth considering.

Example

The cost was so insignificant that nobody noticed it.

そのコストは重要でなく、誰もそれに気づかなかった。

C2 noun /ˌɪnvəˈlɪdɪti/

invalidity

無効性

Meaning

the state of being invalid, legally void, or lacking force or validity

Example

The court ruled that the contract suffered from invalidity.

裁判所はその契約に無効性があると判断した。

B1 adverb /ˈɪnstəntli/

instantly

すぐに

Meaning

immediately, without any delay

Example

He replied instantly to the message.

彼はすぐにメッセージに返事をした。

C1 adjective /ˌɪntərˈtwaɪnd/

intertwined

幸福

Meaning

closely connected or twisted together

Example

Their lives became deeply intertwined after the accident.

彼女は賞を受け取ったとき、幸せを隠せませんでした。

C1 verb /ɪnˈsaɪt/

incite

扇動する

Meaning

to provoke; to stir up

Example

His speech incited the crowd to violence.

彼のスピーチは群衆を暴力に駆り立てた。

B2 verb /ɪnˈkwaɪər/

inquire

尋ねる

Meaning

to ask; to investigate

Example

She inquired about the job opening.

彼女は仕事の募集について尋ねました。

C2 adjective /ˈɪndələnt/

indolent

怠惰

Meaning

Wanting to avoid activity or exertion; lazy.

Example

The indolent cat slept in the sun all afternoon.

怠惰な猫は午後ずっと太陽の下で寝ていました。

C1 noun /ɪnˈsɒm.ni.ə/

Insomnia

不眠症

Meaning

habitual sleeplessness; inability to sleep; the condition of being unable to sleep

Example

Her chronic insomnia made it difficult for her to concentrate during work hours.

彼女の慢性的な不眠症は、仕事中に集中するのを難しくさせた。

C2 noun /ˌɪnəməˈrɑːtə/

inamorata

Meaning

A woman with whom someone is in love; a female lover.

Example

He wrote a poem dedicated to his inamorata.

C1 noun /ɪnˈfɜː.mə.ti/

Infirmity

虚弱; 病気; 衰弱

Meaning

physical or mental weakness; a disease or ailment; frailty

Example

Despite his advanced age and various infirmities, he remained mentally sharp and alert.

高齢で多くの病気を抱えていても、彼は精神的に鋭く、警戒心を持ち続けました。

A2 adjective/noun /ˈaɪrɪʃ/

irish

幸福

Meaning

relating to Ireland, its people, or its language

Example

The Irish countryside is very beautiful.

彼女は賞を受け取ったとき、幸せを隠すことができませんでした。

C1 noun /aɪˈdiː.ə.lɪ.zəm/

Idealism

理想主義

Meaning

the pursuit of high principles and noble goals; unrealistic pursuit of perfection

Example

His youthful idealism motivated him to join various social justice movements.

彼の若い理想主義は、彼を様々な社会正義運動に参加させる原動力となった。

C2 verb /aɪˈdɒləˌtraɪz/

idolatrize

偶像崇拝

Meaning

To worship idols; to regard with excessive devotion or admiration.

Example

They began to idolatrize the statue as a deity.

彼らはその像を神として崇拝し始めました。

C1 adjective /ɪˈnɜːrt/

inert

不活性

Meaning

lacking the ability or strength to move or act; chemically inactive

Example

The patient remained inert on the bed.

患者はベッドで動かずにじっとしていました。

B2 verb /ɪnˈfɛkt/

infect

感染させる

Meaning

To contaminate with a disease-causing organism.

Example

The virus can infect healthy people quickly.

ウイルスは健康な人々を迅速に感染させることができます。

B2 adjective /ɪnˈfekʃəs/

infectious

感染性のある; 伝染する

Meaning

capable of causing infection or disease; spreading easily from one person to another; able to spread feelings or attitudes such as enthusiasm

Example

Her infectious laughter made everyone in the room smile.

彼女の感染力のある笑い声は皆を笑顔にした。

B2 verb /ˈɪntɪɡreɪt/

integrate

統合する

Meaning

To combine or bring together into a unified whole.

Example

The new system integrates data from multiple sources.

新しいシステムは複数のソースからデータを統合します。

C1 adjective /ˌɪn.səˈbɔːr.dɪ.nət/

insubordinate

命令不服従

Meaning

Defiant of authority; disobedient to orders.

Example

The insubordinate employee refused to follow the manager's instructions.

命令不服従の従業員は、マネージャーの指示に従うことを拒否した。

B2 noun /ɪnˈtɛnt/

intent

意図

Meaning

the purpose or reason behind an action; a strong determination to do something

Example

Her intent was to improve the quality of education in the community.

彼女の意図はコミュニティの教育の質を向上させることでした。

A2 adjective /ˈɪn.dɔːr/

indoor

屋内の

Meaning

situated, occurring, or used inside a building

Example

Indoor plants can improve air quality at home.

屋内の植物は家の空気の質を改善できます。

C2 adverb /ˈaɪsɪli/

icily

冷たく

Meaning

In a very cold, unfriendly, or hostile manner.

Example

She replied icily to his question.

彼女は冷たく彼の質問に答えた。

C2 adjective /ˌɪrɪˈdjuːsəbl/

irreducible

不可約

Meaning

impossible to reduce or simplify further

Example

The fraction 3/7 is irreducible.

分数 3/7 は不可約です。

C2 adjective /ɪˈræsɪbl/

irascible

怒りっぽい

Meaning

Easily angered; quick-tempered.

Example

His irascible nature often got him into trouble.

彼の怒りっぽい性格はよくトラブルを引き起こしていた。

C1 adjective /ɪnˈvɪnsəbl/

invincible

無敵

Meaning

too powerful to be defeated or overcome

Example

The team seemed invincible after winning ten matches in a row.

そのチームは10試合連続で勝利した後、無敵に見えた。

C1 noun ˌɪm.pʌlˈsɪv.ɪ.ti

impulsivity

衝動性

Meaning

The tendency to act quickly and without thought or care; lack of self-control.

Example

His impulsivity led him to make reckless choices.

彼の衝動性は、無謀な選択をさせた。

B2 adjective ɪnˈdɪdʒɪnəs

indigenous

先住民の

Meaning

Originating or occurring naturally in a particular place; native.

Example

Indigenous plants are well adapted to the local environment.

先住民の植物は地元の環境にうまく適応しています。

A1 noun /ˈaɪs kriːm/

Ice-cream

アイスクリーム

Meaning

a frozen sweet dessert made from dairy products, usually served cold

Example

Children love to eat ice-cream on hot summer days.

子供たちは暑い夏の日にアイスクリームを食べるのが好きです。

C1 adjective /ɪˈniː.bri.eɪ.tɪd/

inebriated

酔っ払った

Meaning

under the influence of alcohol; drunk

Example

He stumbled into the room completely inebriated.

彼は完全に酔っ払って部屋に入ってきた。

A2 adjective/noun /ˈɪndiən/

indian

インディアンの

Meaning

Relating to India, its people, or their culture.

Example

She loves Indian food, especially biryani.

彼女はインディアンの料理が好きで、特にビリヤニが好きです。

B2 verb /ɪnˈdʒɛkt/

inject

注射する

Meaning

To introduce a substance, especially a drug, into the body using a needle.

Example

The nurse will inject the vaccine into the patient's arm.

看護師は患者の腕にワクチンを注射します。

B2 adjective /ˈɪrɪteɪtɪd/

irritated

いらいらした

Meaning

feeling annoyed or impatient; having inflamed or sore physical condition

Example

She felt irritated by the constant noise outside her window.

窓の外の絶え間ない騒音に彼女はいらいらした。

C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

許しがたい

Meaning

Too bad to be justified or overlooked; unforgivable.

Example

His rude behavior was inexcusable.

彼の無礼な行動は許しがたいものでした。

C2 noun /ˌɪnvəˈluːʃən/

involution

インヴォリューション

Meaning

a complicated or intricate form or state; in biology, the shrinking of an organ after its function has finished

Example

The story was full of involution, making it hard to follow.

その話はインヴォリューションで満ちており、追うのが難しかった。

B2 verb /ɪnˈsɜːrt/

insert

挿入する

Meaning

to put or place something into something else

Example

Please insert the key into the lock.

鍵をロックに挿入してください。

C1 noun /ɪnˈkɒmpɪtəns/

incompetence

無能

Meaning

Lack of ability, skill, or effectiveness in doing something.

Example

The project failed due to the manager’s incompetence.

プロジェクトはマネージャーの無能のため失敗しました。

C2 verb ˈɪn.kʌl.keɪt

inculcate

教え込む

Meaning

Instill an attitude, idea, or habit by persistent instruction; to teach and impress by frequent repetitions.

Example

Parents should inculcate good values in their children.

親は子供たちに良い価値観を教え込むべきだ。

B1 noun /ɪmˈpruːvmənt/

improvement

改善

Meaning

the act of making something better

Example

There has been a significant improvement in his health.

彼の健康には重要な改善がありました。

A2 adjective ˌɪn.təˈnæʃ.ən.əl

international

国際的な

Meaning

Existing, occurring, or carried on between two or more nations and their citizens.

Example

International standards improve competitiveness.

国際基準は競争力を高めます。

B1 adjective /ˈɪnər/

inner

内面的

Meaning

Located inside or closer to the center; relating to one’s thoughts or feelings.

Example

She shared her inner thoughts with her best friend.

彼女は最良の友達に内面的な思いを共有しました。

C1 adjective /ɪmˈpɜːrtɪnənt/

impertinent

無礼な

Meaning

rude and showing a lack of respect

Example

It was impertinent of him to question the manager's decision.

マネージャーの決定に疑問を呈するのは無礼でした。

C1 verb /ɪnˈsɪnjueɪt/

insinuate

Meaning

To suggest or hint something indirectly and often unpleasantly.

Example

He insinuated that she had lied about her qualifications.

C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

議論の余地がない; 否定できない; 確定的

Meaning

impossible to deny or argue against; undeniable; certain

Example

The evidence against him was indisputable.

彼に対する証拠は議論の余地がなかった。

C1 verb /ɪˈnɔːɡjʊreɪt/

inaugurate

Meaning

To formally begin or introduce something, especially with a ceremony.

Example

The mayor will inaugurate the new bridge tomorrow.

B2 noun /ɪnˈtɒlərəns/

intolerance

不寛容

Meaning

unwillingness to accept or endure beliefs, behaviors, or conditions different from one's own

Example

The leader was criticized for his intolerance toward other religions.

リーダーは他の宗教に対する不寛容さで批判されました。

C2 noun /ˈɪŋkjʊbəs/

incubus

悪夢のような重荷

Meaning

An oppressive or nightmarish burden; in folklore, an evil spirit that lies upon sleeping people.

Example

Debt became an incubus that weighed heavily on the family.

借金は家族に重くのしかかる悪夢のような存在となった。

A1 pronoun /ɪts/

its

それの

Meaning

Belonging to or associated with a thing previously mentioned.

Example

The company changed its logo last year.

会社は昨年そのロゴを変更しました。

C2 adjective /ˌɪnkəmˈbʌstəbl/

incombustible

不燃

Meaning

Not capable of catching fire or burning.

Example

This material is incombustible and safe for construction.

この材料は燃えません、安全に建設に使用できます。

C1 noun ˌɪnˈsaɪtfʊlnɪs

insightfulness

洞察力、分析能力

Meaning

The capacity to gain an accurate and deep intuitive understanding of a person or thing.

Example

His insightfulness helped solve the complex problem.

彼の洞察力は複雑な問題を解決するのに役立ちました。

B2 adjective /ɪnˈsɛnsətɪv/

insensitive

無神経な

Meaning

Showing or feeling no concern for others' feelings.

Example

His insensitive comment hurt her deeply.

彼の無神経なコメントは彼女を深く傷つけました。

C2 adjective /ɪnˈkɒnstənt/

inconstant

不安定な

Meaning

frequently changing; not consistent or dependable

Example

His inconstant moods made it difficult to work with him.

彼の不安定な気分は彼と仕事をするのを難しくした。

B1 verb /ˈɪndɪkeɪt/

indicate

示す

Meaning

to point out; to show or suggest; to be a sign of

Example

The red light indicates that you should stop.

赤い信号は停止すべきことを示しています。

C2 adjective /ˌɪnɪkˈstɛnsəbl/

inextensible

伸縮不可

Meaning

Not capable of being stretched or extended.

Example

This rope is made of an inextensible material.

このロープは伸縮不可の材料でできています。

C1 noun /ˈɪn.trə.vɜːrt/

introvert

内向的

Meaning

A person who tends to be shy and prefers spending time alone rather than in groups.

Example

As an introvert, he preferred reading over attending parties.

内向的な性格として、パーティに参加するよりも読書の方が好きでした。

C2 noun /ˈɪmpjʊdəns/

impudence

厚かましさ

Meaning

Rude and disrespectful behavior.

Example

The student's impudence shocked the entire class.

その学生の厚かましさはクラス全体を驚かせた。

C2 noun /ˈɪntəˌkrɒpɪŋ/

intercropping

間作農業

Meaning

The agricultural practice of cultivating two or more crops simultaneously in the same field to maximize land use efficiency and improve soil health.

Example

Intercropping can help improve soil fertility and pest control.

間作農業は土壌の肥沃度と害虫管理の向上に役立ちます。

C2 verb /ɪnˈdɒktrɪˌneɪt/

indoctrinate

教義を押し付ける

Meaning

To teach someone to fully accept a set of beliefs or ideas without question.

Example

The regime tried to indoctrinate the youth with propaganda.

その政権は宣伝を通じて若者を洗脳しようとした。

B2 noun /ˈɪmɪɡrənt/

immigrant

移民

Meaning

a person who comes to live permanently in a foreign country

Example

The city has welcomed many new immigrants this year.

今年、市は多くの新しい移民を迎えました。

C1 adjective /ɪnˈkrɛdjələs/

incredulous

Meaning

unwilling or unable to believe something

Example

He gave her an incredulous look when she claimed she could fly.

C1 adjective /ɪˈnænɪmət/

inanimate

無生物

Meaning

not alive, especially not in the manner of animals and humans; lifeless

Example

The museum was full of inanimate objects from ancient times.

博物館には古代の無生物がいっぱいだった。

C1 adjective ɪnˈtrɪn.zɪk

intrinsic

内在的, 本質的, 自然な

Meaning

Belonging naturally; essential. Existing as a natural or basic part of something.

Example

Creativity is an intrinsic quality of a great artist.

創造性は偉大なアーティストの内在的な資質です。

B2 verb /ɪnˈheɪl/

inhale

吸う

Meaning

to breathe in; to draw air into the lungs

Example

Take a deep breath and inhale slowly.

深く息を吸い、ゆっくり吸い込みます。

B1 verb /ɪnˈtend/

intend

意図する

Meaning

to plan or have in mind as a purpose; to mean

Example

I intend to finish this project by tomorrow.

私はこのプロジェクトを明日までに終わらせるつもりです。

C2 noun /ˈaɪ.kɒn/

ikon

宗教的な画像やシンボル

Meaning

A religious image or symbol, especially in the Eastern Orthodox Church.

Example

The church displayed a beautifully painted ikon of the Virgin Mary.

教会は美しく描かれた聖母マリアのアイコンを展示しました。

C2 adjective /ɪˈrɛfrəɡəbəl/

irrefragable

反論できない

Meaning

Impossible to refute, deny, or break

Example

The lawyer presented irrefragable evidence that proved his client’s innocence.

弁護士は彼のクライアントの無実を証明する反論できない証拠を提示しました。

C1 adjective /aɪˈdɪlɪk/

idyllic

田園詩のように美しい

Meaning

Like an idyll; extremely happy, peaceful, or picturesque.

Example

They enjoyed an idyllic vacation by the sea.

彼らは海辺で田園詩のような休暇を楽しみました。

C2 adjective /ɪmˈprɒvɪdənt/

improvident

先見の明がない

Meaning

Not having or showing foresight; spending wastefully or without thought for the future.

Example

His improvident habits left him with no savings.

彼の先見の明がない習慣は、貯金がないまま彼を残した。

C1 adjective /ɪˈmjuː.tə.bəl/

immutable

不変の

Meaning

Unchangeable, permanent, or fixed

Example

The laws of physics are considered immutable.

物理法則は不変と見なされます。

B2 noun /ˈɪntərfeɪs/

interface

インターフェイス

Meaning

a point where two systems, subjects, or organizations meet and interact

Example

The user interface is designed to be intuitive and user-friendly.

ユーザーインターフェイスは直感的で使いやすく設計されています。

C1 verb /ɪnˈvoʊk/

invoke

呼び出す

Meaning

to call upon a higher power, authority, or principle for help, support, or justification

Example

The lawyer invoked the constitution to defend his client.

弁護士は憲法を引き合いに出して自分のクライアントを守った。

C1 noun /ɪmˈprɪzənmənt/

imprisonment

投獄

Meaning

the act of putting someone in prison; the state of being confined as punishment

Example

He faced imprisonment for violating the court order.

彼は裁判所の命令に違反して投獄に直面した。

A2 noun /ˈɪntəvjuː/

interview

面接

Meaning

A meeting of people face to face, especially for consultation.

Example

The interview was conducted in a calm and professional manner.

面接は落ち着いたプロフェッショナルな方法で行われました。

B1 verb ˈɪndɪkeɪts

indicates

示す

Meaning

Point out; show; be a sign or symptom of; suggest as a desirable or necessary course of action.

Example

The rising trend indicates an urgent need for action.

上昇している傾向は、行動が急務であることを示しています。

C1 adjective /ɪnˈæk.tɪv/

Inactive

非アクティブ

Meaning

not active; not working; dormant; idle

Example

The volcano has been inactive for over a century.

この火山は1世紀以上も活動していない。

C1 verb /ˌɪnstɪˈtjuːʃənəlaɪz/

institutionalize

制度化する

Meaning

to establish something as a formal institution, custom, or practice

Example

The government seeks to institutionalize environmental protection.

政府は環境保護を制度化しようとしています。

C2 adjective /ɪmˈpɒndərəbl̩/

imponderable

計り知れない

Meaning

Something difficult or impossible to estimate, assess, or understand

Example

The outcome of the election depends on many imponderable factors.

選挙の結果は、多くの計り知れない要因に依存しています。

C1 adjective /ɪnˈsɒlvənt/

insolvent

破産

Meaning

unable to pay debts owed

Example

The insolvent firm could not meet its financial obligations.

破産した企業は財務義務を果たせなかった。

C2 adjective /ɪmˈprɛɡnəbl̩/

impregnable

攻略不可能

Meaning

Unable to be captured, broken into, or defeated.

Example

The fortress was considered impregnable by the enemy.

その要塞は敵によって攻略不可能と見なされていました。

C2 verb /ɪnˈfætʃueɪt/

infatuate

夢中にさせる

Meaning

to inspire with an intense but short-lived passion or admiration

Example

He was infatuated with her beauty.

彼は彼女の美しさに夢中でした。

C1 verb /ɪnˈstɪl/

instill

植え付ける

Meaning

to gradually but firmly establish an idea, attitude, or habit in someone's mind

Example

Parents try to instill good values in their children.

親は子供に良い価値観を植え付けようとしています。

C1 adverb /ˌɪn.ədˈvɜːr.tənt.li/

Inadvertently

うっかり; ついうっかり; 誤って

Meaning

without being aware of what you are doing; unintentionally; by mistake

Example

She inadvertently deleted the important file while cleaning her computer.

彼女はコンピュータを掃除しているとき、重要なファイルをうっかり削除してしまった。

C1 adjective /ˈɪrɪtəbl/

irritable

Meaning

easily annoyed or made angry

Example

She became irritable after working long hours without rest.

C1 adjective /ˌɪnsɪˈdɛntəl/

incidental

付随的

Meaning

happening as a minor part or in connection with something else

Example

Incidental expenses like snacks and tips were included in the bill.

スナックやチップのような付随的な費用は請求書に含まれていました。

C2 adjective /ɪnˈdɛkərəs/

indecorous

不作法

Meaning

Not in keeping with good taste and propriety; improper.

Example

His indecorous behavior shocked the audience.

彼の不作法な振る舞いは観客を驚かせた。

C1 verb /ɪmˈpɜːrsəneɪt/

impersonate

偽る

Meaning

to pretend to be another person in order to entertain or deceive

Example

He was arrested for trying to impersonate a police officer.

彼は警察官を装おうとしたため逮捕されました。