B2 adjective /ɪnˈkeɪpəbəl/

incapable

無能力な

Meaning

lacking the ability, skill, or capacity to do something

Example

He is incapable of understanding complex instructions.

彼は複雑な指示を理解できない。

B1 adjective /ɪnˈtɜːrnəl/

internal

内部

Meaning

situated inside; relating to the inside or inner part of something

Example

The company is conducting an internal audit this month.

その会社は今月内部監査を行っています。

A1 conjunction /ɪf/

if

もし

Meaning

used to introduce a condition or supposition

Example

If it rains tomorrow, we will stay home.

もし明日雨が降ったら、私たちは家にいます。

C1 verb /ɪmˈpiːd/

impede

妨げる

Meaning

To obstruct or hinder the progress or development of something.

Example

Lack of funds can impede business growth.

資金不足はビジネスの成長を妨げる可能性があります。

C1 adjective /ɪnˈtjuː.ɪ.tɪv/

intuitive

直感的

Meaning

Based on instinctive understanding rather than reasoning.

Example

The software has an intuitive design that makes it easy to use.

そのソフトウェアは直感的なデザインを持っており、使いやすいです。

C1 adjective ɪnˈdel.ə.bəl

indelible

消えない

Meaning

Making marks that cannot be removed; impossible to forget or remove.

Example

Her speech left an indelible mark on the audience.

彼女のスピーチは聴衆に消えない印象を残しました。

B1 adverb /ɪnˈkriːsɪŋli/

increasingly

ますます

Meaning

more and more over time

Example

People are increasingly concerned about climate change.

人々は気候変動についてますます懸念しています。

C1 noun /ˌaɪ.diˈɒl.ə.dʒi/

ideology

イデオロギー

Meaning

A system of ideas and ideals, especially one that forms the basis of economic or political theory and policy.

Example

Democracy is based on the ideology of freedom and equality.

民主主義は自由と平等のイデオロギーに基づいています。

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。

A2 noun/adjective /ˌɪndɪˈvɪdʒuəl/

individual

個人

Meaning

A single human being as distinct from a group; relating to one person.

Example

Each individual has the right to freedom of speech.

各個人には表現の自由がある。

A2 adjective, noun /ɪˈtæliən/

italian

幸福

Meaning

relating to Italy, its people, or its language; a person from Italy

Example

She loves Italian food.

彼女は賞を受け取ったとき、自分の幸せを隠せませんでした。

C2 adjective /ɪmˈpɑːlɪtɪk/

impolitic

無礼な

Meaning

Unwise or imprudent; not showing good judgment.

Example

It would be impolitic to criticize them openly.

彼らを公然と批判するのは無礼だろう。

C1 noun ɪnˈsɛpʃən

inception

始まり

Meaning

The establishment or starting point of an institution or activity.

Example

The inception of the company marked a new era in the industry.

その企業のインセプションは業界に新しい時代を築きました。

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。

C1 noun /ˈɪn.fən.tri/

Infantry

歩兵

Meaning

soldiers marching or fighting on foot; foot soldiers collectively

Example

The infantry advanced across the battlefield on foot.

歩兵は戦場を徒歩で進んだ。

B2 noun /ˌɪnstəˈbɪləti/

instability

不安定

Meaning

lack of stability or balance; tendency to change, fail, or collapse easily

Example

Political instability has slowed economic growth in the region.

政治的な不安定さが地域の経済成長を遅らせた。

C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

本質的でない

Meaning

not necessary or important; not essential

Example

The report removes all inessential details to stay focused.

その報告書は焦点を保つために本質的でない詳細を削除している。

C2 noun /ˌɪn.strəˈmɛn.təl.ɪst/

instrumentalist

楽器奏者

Meaning

A person who plays a musical instrument.

Example

The instrumentalist played a beautiful solo on the violin.

楽器奏者はバイオリンで美しいソロを演奏しました。

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。

C2 noun /ɪmp/

imp

小さないたずら好きな悪魔

Meaning

a small mischievous devil or sprite; a playful troublemaker

Example

The child was acting like a little imp, hiding his toys everywhere.

その子供は小さなインプのように振る舞い、どこにでもおもちゃを隠していました。

C2 noun /ɪnˈtɜːrmənt/

interment

埋葬

Meaning

The act of burying a dead body in a grave or tomb.

Example

The interment took place at the family cemetery.

埋葬は家族の墓地で行われました。

C2 verb /ɪˈmjʊər/

immure

閉じ込める

Meaning

to confine or enclose someone against their will

Example

The prisoner was immured in a dark cell.

囚人は暗い監房に閉じ込められた。

C1 adjective /ˌɪntərˈtʃeɪndʒəbl/

interchangeable

交換可能な

Meaning

able to be exchanged with each other without difference or loss of function

Example

These machine parts are interchangeable, so they can be replaced easily.

これらの機械部品は交換可能なため、簡単に交換できます。

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。

C2 noun /ˈaɪ.ərn.wʊd/

Ironwood

アイアンウッド

Meaning

a hard, dense wood from various trees; also the tree itself that produces small flowers

Example

The ironwood tree blooms with tiny white flowers.

アイアンウッドの木は小さな白い花を咲かせます。

C2 adjective /ˌɪnkoʊˈɜːrsəbl̩/

incoercible

強制できない

Meaning

Not capable of being forced, compelled, or restrained.

Example

Her incoercible spirit inspired others to fight for justice.

彼女の強制できない精神は他の人々に正義のために戦うようにインスパイアした。

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 /ˌɪntərˈsɛpt/

intercept

Meaning

to stop, catch, or seize something on its way from one place to another

Example

The police intercepted the stolen car before it crossed the border.

C2 adjective /ˌɪn.trəˈmjʊə.rəl/

intramural

学内

Meaning

Occurring within the walls of a single institution, especially a school or college.

Example

The college organizes intramural sports competitions every semester.

大学は毎学期、学内スポーツ競技を開催しています。

C2 verb /ɪnˈtɜːr/

inter

埋葬する

Meaning

To bury a dead body in the ground.

Example

They decided to inter the soldier with full honors.

彼らは兵士を全ての名誉を持って埋葬することに決めた。

C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

無機の

Meaning

relating to substances that are not derived from living organisms; lacking organic structure or growth

Example

Inorganic compounds are commonly studied in chemistry labs.

無機化合物は化学の基本です。

C1 adjective /ˌɪnkəʊˈhɪərənt/

incoherent

一貫性のない

Meaning

Not clear or easy to understand; lacking logical connection.

Example

His explanation was so incoherent that nobody could follow it.

彼の説明はあまりにも一貫性がなく、誰もそれを追うことができませんでした。

C1 verb /ɪnˈfleɪm/

inflame

煽る

Meaning

to arouse strong feelings or provoke anger; to cause inflammation in the body

Example

The politician's remarks served to inflame public opinion.

政治家の発言は公共の意見を煽る結果になった。

C1 adjective /ˈaɪərnˌklæd/

ironclad

鉄壁の

Meaning

impossible to change, break, or dispute; very strong and firm

Example

The company had an ironclad contract with its suppliers.

その会社はサプライヤーと鉄壁の契約を結んでいた。

B1 adjective /ɪmˈpeɪʃənt/

impatient

イライラ

Meaning

Not able to wait calmly; restless and eager for something to happen.

Example

She grew impatient while waiting in the long queue.

彼女は長い列で待っている間にイライラしてきた。

C1 verb /ɪˈluːmɪneɪt/

illuminate

照らす

Meaning

To light up or make something clearer.

Example

Streetlights illuminate the road at night.

街路灯が夜に道路を照らします。

C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

仮の

Meaning

Given during the course of a legal action, not final but temporary or provisional.

Example

The judge issued an interlocutory order to maintain the status quo until the hearing.

裁判官は聴聞会まで現状を維持するために仮の命令を出しました。

C2 adjective /ɪɡˈnoʊ.bəl/

Ignoble

卑劣; 恥ずべき; 不名誉

Meaning

dishonorable; not noble in character; base or mean

Example

His ignoble actions betrayed his friends' trust.

彼の卑劣な行動は友人たちの信頼を裏切った。

C2 adjective /ˌɪrɪˈlɪdʒəs/

irreligious

無宗教

Meaning

Indifferent or hostile to religion

Example

Some people in the community consider him irreligious because he never attends religious services.

コミュニティの中で、彼は宗教的なサービスに一度も参加しないため、無宗教だと考えられています。

C1 noun /ˌɪnkənˈsɪstənsi/

inconsistency

不一致

Meaning

The quality of being contradictory, irregular, or not staying the same.

Example

There is an inconsistency between his words and actions.

彼の言葉と行動には不一致があります。

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 /ˌɪrɪˈvɜːrsəbl/

irreversible

不可逆な

Meaning

Not able to be undone, changed, or reversed.

Example

The damage caused by the fire was irreversible.

火事によって生じた損害は不可逆でした。

C1 noun /ɪˌluːmɪˈneɪʃən/

illumination

Meaning

the act of lighting something or making something clear

Example

The street was filled with bright illumination from the lamps.

C1 adjective /ɪnˈkɒmp(ə)rəbl/

incomparable

比類のない

Meaning

Without an equal in quality or excellence; matchless.

Example

The view from the mountain was incomparable.

山からの景色は比類のないものでした。

C2 noun /ɪnˈvɛktɪv/

invective

侮辱的な言葉

Meaning

Insulting, abusive, or highly critical language.

Example

The politician’s speech was filled with invective against his opponents.

その政治家の演説は、対立候補に対する侮辱的な言葉で満ちていた。

C2 noun /ˌɪnkænˈdɛsəns/

incandescence

白熱光

Meaning

the emission of light from a hot object; brilliance

Example

The incandescence of the candle filled the dark room.

ろうそくの白熱光が暗い部屋を満たしました。

B1 noun ɪnˈvestmənt

investment

投資

Meaning

The action or process of investing money for profit or material result.

Example

Investment in waste management infrastructure is essential.

廃棄物管理インフラへの投資は不可欠です。

C1 adjective /ɪnˈveə.ri.ə.bəl/

Invariable

不変の; 一定の; 常に同じ

Meaning

never changing; constant; always the same

Example

His invariable routine includes morning exercise and coffee.

彼の不変のルーチンには、朝の運動とコーヒーが含まれています。

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。

A2 verb /ɪnˈvaɪt/

invite

招待する

Meaning

to ask someone to come to an event or to do something

Example

We should invite all our friends to the party.

パーティーに友達を招待するべきです。

B1 adjective /ɪmˈpres.ɪv/

Impressive

印象的な

Meaning

striking; remarkable; having the ability to impress

Example

Her impressive performance earned her a standing ovation.

彼女の印象的な演技はスタンディングオベーションを受けた。

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。

C2 noun /ˈɪrɪtənsi/

irritancy

苛立ち

Meaning

the quality or state of causing irritation; legal or formal invalidation

Example

The constant noise became an irritancy to the neighbors.

絶え間ない騒音は隣人にとって苛立ちの原因となりました。

C1 adjective /ˈɪnərmoʊst/

Innermost

最も深い; 最も個人的な

Meaning

most private and secret; deepest; most personal

Example

She shared her innermost feelings with her closest friend.

彼女は最も深い感情を最も親しい友人と共有しました。

A2 adjective /ɪl/

Ill

病気; 不調; 健康状態が悪い

Meaning

sick; unwell; in poor health

Example

He felt ill and decided to stay home from work.

彼は気分が悪く、仕事を休んで家にいることに決めました。

C1 adjective /ɪnˈsɛp(ə)rəbəl/

inseparable

切り離せない

Meaning

Unable to be separated or always together.

Example

The two friends have been inseparable since childhood.

二人の友達は子供の頃から切り離せないです。

C1 noun /ɪnˈdɪf.ər.əns/

Indifference

無関心; 無関心さ; アパシー

Meaning

lack of interest, concern, or sympathy; the state of not caring about something

Example

His indifference to his studies resulted in poor grades throughout the semester.

彼の学業に対する無関心さが、学期中ずっと悪い成績をもたらした。

A2 noun /ˈɪm.ɪdʒ/

Image

イメージ; 画像; 形象

Meaning

a representation of the external form of a person or thing in art; a mental picture or impression

Example

The company worked hard to improve its public image after the scandal.

企業はスキャンダル後、公共のイメージを改善するために一生懸命働きました。

C1 adjective /ˌɪnhɒˈspɪtəbl/

inhospitable

住みにくい

Meaning

Harsh and difficult to live in; unfriendly or unwelcoming to guests.

Example

The desert is an inhospitable environment for most plants.

砂漠はほとんどの植物にとって住みにくい環境です。

C2 adjective /ɪnˈvaɪələbl/

inviolable

侵害できない

Meaning

never to be broken, dishonored, or violated

Example

Human rights are considered inviolable in modern democracies.

人権は現代の民主主義において侵害できないと見なされています。

C1 noun /ɪmˈpɜːrtɪnəns/

impertinence

無礼

Meaning

lack of respect; rudeness

Example

The teacher was shocked by the student's impertinence.

教師は生徒の無礼さに驚いた。

C2 adjective /ɪnˈsɪpɪd/

insipid

味気ない

Meaning

lacking flavor, interest, or excitement; dull

Example

The soup was insipid and needed more seasoning.

スープは味気なく、もっと調味料が必要でした。

A2 noun /ˌɪn.trəˈdʌk.ʃən/

introduction

紹介

Meaning

the action of introducing something or someone; an opening or beginning part

Example

The professor gave a brief introduction before starting the lecture.

教授は講義を始める前に簡単なイントロダクションをしました。

B1 abbreviation /ˌaɪˈiː/

ie

すなわち

Meaning

That is to say; used to clarify or explain something more precisely.

Example

Many amphibians, i.e., frogs and salamanders, can live both in water and on land.

多くの両生類、すなわちカエルとサラマンダーは、水中と陸上の両方で生きることができます。

B1 noun ɪˈnɪʃətɪv

initiative

イニシアティブ

Meaning

An act or strategy intended to resolve a difficulty or improve a situation; a fresh approach to something.

Example

NASA's initiative to return humans to the Moon is ambitious.

NASAの月面への人類を戻すイニシアティブは野心的です。

C1 adjective ˌɪm.pəˈsɛp.tɪ.bəl

imperceptible

気づかれない

Meaning

So subtle or gradual that it is difficult to notice or perceive

Example

The changes in his behavior were imperceptible at first.

彼の行動の変化は最初は気づかれないものでした。

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 /ɪmˈbɛd/

imbed

埋め込む

Meaning

To fix firmly or deeply in a surrounding mass.

Example

The journalist imbedded himself with the troops to report firsthand.

ジャーナリストは部隊に埋め込まれて、最前線から報告を行った。

C2 noun /ɪmˈpʌlʃən/

impulsion

Meaning

a strong urge or drive to act; the act of impelling

Example

His impulsion to travel made him leave his job suddenly.

B2 adjective ˈɪn.tɪ.ɡrəl

integral

不可欠

Meaning

Necessary to make a complete whole; essential or fundamental.

Example

Exercise is an integral part of a healthy lifestyle.

運動は健康的なライフスタイルの不可欠な部分です。

C1 verb /ɪnˈfjuːz/

infuse

Meaning

to fill or spread through something; to instill a quality, idea, or feeling

Example

The teacher tried to infuse her students with a love for reading.

C2 noun /ˌɪkθiˈɒlədʒi/

ichthyology

魚類学

Meaning

The branch of zoology that deals with fish.

Example

He pursued a degree in ichthyology at the university.

彼は大学で魚類学の学位を取得した。

C2 adjective /ˌɪndaɪˈdʒestəbəl/

Indigestible

消化不良な; 消化しにくい

Meaning

difficult or impossible to digest; hard to process in the stomach

Example

The old bread became hard and indigestible.

古いパンは硬くなり、消化不良になった。

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。

C1 adjective /ɪˈnɔːrdənət/

inordinate

過度の

Meaning

Excessive or unusually large in degree.

Example

She spent an inordinate amount of time on her phone.

彼女は電話に過度の時間を費やしました。

C1 verb /ɪnˈvɜːrt/

invert

逆さにする

Meaning

To turn something upside down or in the opposite position, order, or direction.

Example

He inverted the glass to let the water drain out.

彼は水が流れ出るようにグラスを逆さまにしました。

B1 noun /ˈɪnstəns/

instance

例

Meaning

An example or single occurrence of something.

Example

This is just one instance of his generosity.

これは彼の寛大さの一例です。

A2 noun /ˈɪlnəs/

illness

病気

Meaning

A condition of being unwell or suffering from a disease.

Example

She missed school due to a serious illness.

彼女は深刻な病気のため学校を休んだ。

B1 noun ˌɪn.stɪˈtjuː.ʃən

institution

機関

Meaning

An organization founded and united for a specific purpose; an established law, practice, or custom.

Example

Institutions play a crucial role in governance.

機関はガバナンスにおいて重要な役割を果たしています。

C1 adjective /ɪnˈdʌktɪv/

inductive

帰納的

Meaning

characterized by the inference of general laws from particular instances; reasoning from specific cases to general principles

Example

The scientist used inductive reasoning to form a hypothesis.

科学者は帰納的推論を使って仮説を立てました。

C2 adjective /ˌɪnfəˈlɪsɪtəs/

infelicitous

不適切な

Meaning

not suitable or well chosen; awkward or unfortunate

Example

His infelicitous remark ruined the atmosphere of the meeting.

彼の不適切な発言は会議の雰囲気を台無しにしました。

B1 noun /ɪnˈvɛstər/

investor

投資家

Meaning

a person or organization that puts money into financial schemes, property, or business ventures with the expectation of achieving a profit

Example

The investor funded the startup with a large sum of money.

投資家はスタートアップに大金を投資しました。

B2 adjective /ˌɪnɪˈfɪʃənt/

Inefficient

非効率的

Meaning

not achieving maximum productivity; wasteful of time or resources

Example

The old computer system was inefficient and wasted a lot of time.

古いコンピュータシステムは非効率的で、多くの時間を無駄にしました。

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 noun /ɪnˈsen.tɪv/

Incentive

インセンティブ; 刺激

Meaning

a thing that motivates or encourages someone to do something; a reward or penalty that influences behavior

Example

The company offered a cash incentive to employees who exceeded their sales targets.

その会社は売上目標を達成した従業員に現金インセンティブを提供しました。

C2 noun /ɪnˈtɜːrstɪs/

interstice

隙間

Meaning

a small space that lies between things

Example

Light filtered through the narrow interstices of the wall.

光は壁の狭い隙間を通して漏れた。

C2 verb /ɪmˈpjuːt/

impute

帰する

Meaning

to attribute a fault or responsibility to someone

Example

They imputed the company's success to good leadership.

彼らは会社の成功を良いリーダーシップに帰属させた。

A2 adverb /ˌɪnˈdɔːrz/

indoors

屋内で

Meaning

inside a building; within an enclosed space

Example

Because of the rain, everyone stayed indoors.

雨のため、みんな屋内で過ごしました。

C2 noun /ˌɪnvəˈkeɪʃən/

invocation

祈願

Meaning

the act of calling upon a higher power for help, blessing, or inspiration

Example

The ceremony began with an invocation to the gods.

儀式は神々への祈願から始まりました。

C2 adjective /ɪmˌpɜːrˈsweɪdəbl/

impersuadable

説得できない

Meaning

not able to be convinced or persuaded

Example

She remained impersuadable despite all our arguments.

彼女はすべての議論にもかかわらず説得できなかった。

C2 adjective/verb /ɪnˈkɑːrneɪt/

incarnate

具現化

Meaning

to embody or represent in human form; in flesh

Example

She is kindness incarnate.

彼女は親切さの具現化です。

C2 adjective /ɪmˈpræktɪkəbl/

impracticable

実行不可能

Meaning

Not capable of being carried out or put into practice.

Example

The plan seemed impracticable due to limited resources.

資源が限られていたため、計画は実行不可能に見えました。

C2 adjective /ˌɪmpɪˈkjuːniəs/

impecunious

貧乏

Meaning

Having little or no money; poor.

Example

He grew up in an impecunious family.

彼は貧乏な家族で育ちました。

C2 adjective /ɪmˈpruːdənt/

imprudent

不注意な

Meaning

Not showing care for the consequences of an action.

Example

It was imprudent to drive in such stormy weather.

こんな嵐の天気で運転するのは不注意だった。

C1 noun /ɪnˈɛk.wɪ.ti/

inequity

不平等

Meaning

Lack of fairness or justice; unequal distribution or treatment.

Example

Social inequity continues to be a global issue.

社会的不平等は依然としてグローバルな問題です。

C1 verb /ˈɪrɪˌɡeɪt/

irrigate

灌漑する

Meaning

to supply water to land or crops; to wash out a wound with water

Example

Farmers irrigate their fields during dry seasons.

農家は乾季に畑に灌漑を行います。

A2 adjective /ˈɪntrəstɪd/

interested

興味がある

Meaning

Showing curiosity or concern about something.

Example

She is very interested in learning new languages.

彼女は新しい言語を学ぶことにとても興味がある。

B2 noun ɪˈmjuː.nɪ.ti

immunity

免疫力

Meaning

The ability of an organism to resist a particular infection or toxin by the action of specific antibodies.

Example

A strong immunity protects against infections.

強い免疫力は感染症から守ります。

C1 noun /ˌɪnsəˈfɪʃənsi/

insufficiency

不足

Meaning

The state of not being enough or not being adequate.

Example

The project failed due to the insufficiency of funds.

プロジェクトは資金不足のため失敗しました。

C1 verb /ɪɡˈnaɪt/

ignite

点火する

Meaning

To catch fire or cause to catch fire; to start or arouse.

Example

The sparks ignited the dry leaves in seconds.

火花が数秒で乾燥した葉に火をつけた。

C2 noun /ɪmˈpjuːɪsəns/

impuissance

無力, 無能

Meaning

inability to take effective action; helplessness

Example

The government’s impuissance in the face of crisis frustrated the people.

危機の前で政府の無力さが人々を失望させた。

B2 adjective/noun /ɪˈrɑːki/

iraqi

イラクの

Meaning

relating to Iraq or its people

Example

The Iraqi culture is rich and diverse.

イラクの文化は豊かで多様です。

C1 adjective /ɪnˈvɑːlənˌtɛri/

involuntary

不随意

Meaning

done without will or conscious control

Example

He gave an involuntary shiver when he heard the loud noise.

彼は大きな音を聞いたとき、不随意に震えた。

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。

C1 adjective /ɪnˈtændʒəbl/

intangible

無形の

Meaning

Unable to be touched or grasped; not having a physical presence.

Example

Trust is an intangible quality in relationships.

信頼は関係において無形の特質です。

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。

B2 adjective /ɪmˈprɒp.ər/

Improper

不適切な; 不正確な; 不適当な

Meaning

inappropriate; incorrect; not suitable

Example

It would be improper to discuss personal matters in a business meeting.

ビジネス会議で個人的な事柄を議論するのは不適切です。

C2 noun /ˌɪntərˈsɛsər/

intercessor

仲介者

Meaning

a person who intervenes or pleads on behalf of another

Example

He acted as an intercessor to resolve the conflict between the two families.

彼は二つの家族間の対立を解決するために仲介者として行動しました。

C1 verb /ɪmˈpɛər/

impair

損なう

Meaning

to weaken or damage something, especially a function or ability

Example

Smoking can impair your lung capacity.

喫煙は肺活量を害する可能性があります。

C1 adjective /ˈɪnbɔːrn/

Inborn

生まれつきの; 生来の; 内在的な

Meaning

existing from birth; natural; inherent

Example

She has an inborn talent for music.

彼女は音楽のための生まれつきの才能を持っています。

B2 noun /ˈɪnstɪŋkt/

instinct

本能

Meaning

A natural way of behaving or reacting that does not require learning.

Example

Birds build nests by instinct.

鳥は本能で巣を作ります。

C2 noun /ˈɪndələns/

indolence

怠惰

Meaning

Avoidance of activity or exertion; laziness.

Example

His indolence kept him from finishing the project on time.

彼の怠惰は彼が時間通りにプロジェクトを完成させるのを妨げました。

C1 adjective /ɪnˈvæljʊəbl/

invaluable

計り知れない価値がある

Meaning

Extremely useful or indispensable.

Example

Her advice proved invaluable to my success.

彼女の助言は私の成功にとって非常に貴重でした。

C2 noun /ˌɪnˌkeɪpəˈbɪləti/

incapability

無能力

Meaning

lack of ability or power to do something; inability or incompetence

Example

His incapability to manage the team led to serious problems.

チームを管理する彼の無能力は深刻な問題を引き起こした。

C1 verb /ɪmˈploʊd/

implode

内爆

Meaning

To collapse or burst inward violently.

Example

The old building imploded during the demolition.

古い建物は解体中に内向きに崩壊しました。

C1 verb /ɪmˈpɛl/

impel

Meaning

to drive, force, or urge someone to do something

Example

Her curiosity impelled her to open the mysterious box.

C2 noun /ɪnˈsaɪzər/

incisor

切歯

Meaning

a narrow-edged tooth at the front of the mouth, adapted for cutting

Example

The dentist noted that his upper left incisor was chipped.

歯科医は彼の上の左側の切歯が欠けていることに気づきました。

C2 adjective /ɪnˈɛstɪməbl/

inestimable

計り知れない

Meaning

Too great or valuable to be measured or estimated.

Example

Her contribution to the project was of inestimable value.

プロジェクトへの彼女の貢献は計り知れない価値があった。

C2 adjective /ɪmˈplaɪəbl/

impliable

暗示可能な

Meaning

Capable of being implied or suggested.

Example

The meaning of the statement is not directly clear but is impliable from the context.

その声明の意味は直接的には明確ではないが、文脈から推測可能である。

C1 noun /ɪnˈsaɪtmənt/

incitement

扇動

Meaning

the action of provoking unlawful or violent behavior

Example

He was arrested for incitement to riot.

彼は暴動を扇動した罪で逮捕された。

C2 noun /aɪˈkɒnəklæst/

iconoclast

偶像破壊者

Meaning

A person who attacks or criticizes cherished beliefs, traditions, or institutions.

Example

He was known as an iconoclast who challenged old traditions.

彼は古い伝統に挑戦した偶像破壊者として知られていました。