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 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。

C1 noun /ˌɪrɪˌspɒnsəˈbɪləti/

irresponsibility

無責任

Meaning

lack of responsibility or accountability; failure to act in a reliable or sensible way

Example

The accident was caused by his irresponsibility at work.

その事故は彼の職場での無責任さが原因でした。

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。

C1 noun /ɪmˈpɜː.mə.nəns/

impermanence

無常

Meaning

The state or fact of lasting for only a limited period of time.

Example

The philosophy of Buddhism emphasizes the impermanence of life.

仏教の哲学は、人生の無常性を強調します。

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 /ˌɪndɪˈstrʌktəbl/

indestructible

壊れない

Meaning

Impossible to destroy or break.

Example

The superhero's shield was said to be indestructible.

スーパーヒーローの盾は壊れないと言われていました。

C1 verb /ɪmˈpɛrɪl/

imperil

危険にさらす

Meaning

To put in danger or at risk.

Example

Reckless driving can imperil the lives of others.

無謀な運転は他人の命を危険にさらす可能性があります。

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 /ˈɪnstɪˌɡeɪtər/

instigator

扇動者

Meaning

A person who brings about or initiates something, usually something bad.

Example

The police identified him as the instigator of the violence.

警察は彼を暴力の扇動者として特定しました。

C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

結論が出ていない

Meaning

Not leading to a definite result or decision.

Example

The investigation remained inconclusive due to a lack of evidence.

証拠の不足により、調査は結論が出ていないままでした。

C1 adjective /ˌɪnkənˈsɪdərət/

inconsiderate

思いやりがない

Meaning

Thoughtless; showing a lack of concern for others.

Example

It was inconsiderate of him to play loud music late at night.

夜遅くに大きな音で音楽を流すことは、思いやりがない行動でした。

C1 verb /ɪnˈfrɪndʒ/

infringe

侵害する

Meaning

To actively break the terms of a law, agreement, or right.

Example

Copying this software without permission will infringe copyright laws.

許可なくこのソフトウェアをコピーすると著作権法を侵害することになります。

C1 noun /ˌɪn.trəˈspek.ʃən/

introspection

内省

Meaning

The examination or observation of one's own mental and emotional processes; self-reflection.

Example

Through introspection, she gained insight into her emotions.

内省を通じて、彼女は自分の感情に対する深い洞察を得ました。

C1 adjective /ɪnˈkɒmpɪtənt/

incompetent

Meaning

Lacking the necessary ability or skills to do something successfully.

Example

He was fired because he was incompetent at his job.

C1 adjective /ˌɪrɪˈspɛktɪv/

Irrespective

無視して; 問わず

Meaning

without taking something into account; regardless of

Example

All students will be treated equally, irrespective of their background.

すべての学生は、背景に関係なく平等に扱われます。

C1 verb /ɪmˈpɛl/

impel

Meaning

to drive, force, or urge someone to do something

Example

Her curiosity impelled her to open the mysterious box.

C1 noun /ɪnˈdaɪtmənt/

indictment

起訴状

Meaning

a formal charge or accusation of a serious crime

Example

The indictment accused the company of multiple violations.

起訴状は、会社に対する複数の違反を告発しました。

C1 verb /ɪnˈskraɪb/

inscribe

刻む

Meaning

to write or carve words or symbols on a surface

Example

They inscribed her name on the trophy.

彼らはトロフィーに彼女の名前を刻みました。

C1 adjective /ˌɪrɪˈprɛsəbl̩/

irrepressible

抑制できない

Meaning

Impossible to control or restrain.

Example

She had an irrepressible urge to laugh during the speech.

彼女はスピーチ中に抑制できない笑いの衝動を隠すことができませんでした。

C1 adjective /ɪnˈsɪdiəs/

insidious

陰険な

Meaning

Proceeding in a gradual, subtle way but with harmful effects.

Example

The insidious spread of misinformation can damage trust.

誤った情報の陰険な広がりは信頼を傷つける可能性がある。

C1 noun /ɪmˈbæl.əns/

Imbalance

不均衡

Meaning

lack of proportion or relation between corresponding things; unequal distribution

Example

The doctor said the patient's dizziness was caused by an inner ear imbalance.

医者は患者のめまいが内耳の不均衡によって引き起こされたと言いました。

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 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。

C1 noun ˌɪndɪˈspensəbl səˈpɔːrt

indispensable support

欠かせないサポート

Meaning

Essential assistance that cannot be done without; absolutely necessary help.

Example

Volunteers provide indispensable support to communities.

ボランティアはコミュニティに欠かせないサポートを提供しています。

C1 adjective /ˌɪndɪˈskriːt/

indiscreet

軽率

Meaning

Not careful in what one says or does, likely to reveal secrets or offend.

Example

It was indiscreet of him to mention the plan in public.

公衆の面前で計画について言及するのは軽率だった。

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 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 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 verb /ˈɪnstɪˌɡeɪt/

instigate

扇動する

Meaning

To bring about or initiate an action, often something negative.

Example

He was accused of instigating the riot.

彼は暴動を扇動したとして告発された。

C1 adjective ɪˈneɪt

Innate

生まれつきのまたは自然の

Meaning

Existing from birth or natural

Example

She has an innate talent for music.

彼女は音楽において生まれつきの才能を持っている。

C1 noun /ˈaɪsətəʊp/

isotope

同位体

Meaning

Atoms of the same element with equal number of protons but different numbers of neutrons.

Example

Carbon-14 is a radioactive isotope used in dating fossils.

炭素-14は化石の年代を測定するために使用される放射性同位体です。

C1 verb /ˈɪmprəvaɪz/

improvise

Meaning

To create or perform something spontaneously without preparation.

Example

The actor had to improvise his lines when he forgot the script.

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 adjective /ɪnˈstrʌktɪv/

instructive

教育的

Meaning

useful and informative; providing knowledge or instruction

Example

The lecture was highly instructive and engaging.

その講義は非常に教育的で魅力的でした。

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 noun /ɪmˈpɛd.ɪ.mənt/

impediment

障害

Meaning

A hindrance or obstruction in doing something; something that prevents progress.

Example

Lack of funds is a major impediment to the project.

資金不足はプロジェクトの大きな障害です。

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。

C1 adjective /ɪmˈpoʊzɪŋ/

imposing

威圧的な

Meaning

having an appearance that is grand, impressive, or commanding

Example

The castle is an imposing structure overlooking the valley.

その城は谷を見下ろす威圧的な構造です。

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 /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 noun /ɪnˈdʒʌŋkʃən/

injunction

差止命令

Meaning

A judicial order restraining a person from an action or compelling a certain act.

Example

The court issued an injunction to stop the company from polluting the river.

裁判所は、会社が河川を汚染するのを防ぐために差止命令を出した。

C1 adjective /ˌɪnstənˈteɪniəs/

instantaneous

即時

Meaning

Happening immediately, without any delay.

Example

The change in temperature was almost instantaneous.

温度の変化はほぼ即時でした。

C1 verb /ɪnˈvɪɡ.ər.eɪt/

invigorate

活性化する

Meaning

To give strength or energy to someone or something.

Example

A morning walk can invigorate both body and mind.

朝の散歩は、体と心を活性化することができます。

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 /ɪnˈtɛlɪdʒəbl/

intelligible

Meaning

Able to be understood; clear enough to be comprehended.

Example

Her speech was barely intelligible over the noise.

C1 noun /ˌɪnsɪɡˈnɪfɪkəns/

insignificance

重要でないこと

Meaning

The quality of being unimportant or trivial.

Example

He felt a sense of insignificance in the vast universe.

彼は広大な宇宙で重要でないことを感じました。

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 /ɪnˈkrɪmɪˌneɪt/

incriminate

有罪にする

Meaning

to make someone appear guilty of a crime or wrongdoing

Example

The new evidence could incriminate the suspect in the robbery case.

新しい証拠がロビー事件の容疑者を有罪にする可能性があります。

C1 adjective /ˌɪnədˈvaɪzəbl/

inadvisable

推奨されない

Meaning

Not recommended; likely to have undesirable consequences.

Example

It is inadvisable to drive in such heavy rain.

このような大雨の中で運転するのは推奨されません。

C1 adjective ˌɪn.təˈdɪs.ɪ.plɪ.nər.i

interdisciplinary

学際的

Meaning

Relating to more than one branch of knowledge.

Example

The interdisciplinary approach in education enhances problem-solving skills.

教育における学際的アプローチは、問題解決スキルを向上させる。

C1 noun /ˈɪntərˌluːd/

interlude

間奏

Meaning

A short period of time that comes between two events; an interval.

Example

There was a brief musical interlude between the two acts of the play.

演劇の二つの幕の間に短い音楽の間奏がありました。

C1 verb /ɪmˈpɪndʒ/

impinge

影響を与える

Meaning

to have an effect or impact on something; to encroach or infringe

Example

The noise from the construction site impinges on our daily activities.

建設現場の音は私たちの日常的な活動に影響を与えます。

C1 noun /ˈɪnflʌks/

influx

流入

Meaning

A large arrival or flow of people or things.

Example

The city experienced an influx of tourists during the festival.

その都市は祭りの期間中に観光客の流入を経験しました。

C1 verb /ɪnˈdaɪt/

indict

起訴する

Meaning

to formally accuse someone of committing a serious crime

Example

The grand jury decided to indict the politician for corruption.

大陪審団は腐敗のために政治家を起訴することを決定した。

C1 adjective /ˌɪnsərˈmaʊntəbl/

insurmountable

克服不可能

Meaning

Too great to be overcome.

Example

The explorers faced insurmountable odds in the desert.

探検者たちは砂漠で克服不可能な障害に直面した。

C1 verb /ˈɪnkjʊˌbeɪt/

incubate

孵化する

Meaning

to keep eggs, cells, or organisms at the right conditions for development

Example

The hen will incubate the eggs until they hatch.

そのニワトリは卵が孵化するまでインキュベートします。

C1 adjective /ɪnˈhɪbɪtɪd/

inhibited

抑制された

Meaning

Unable to act in a relaxed and natural way, especially due to self-consciousness or restraint.

Example

He was too inhibited to express his true feelings.

彼は自分の本当の感情を表現するにはあまりにも抑制されていた。

C1 adjective /ˌɪn.səbˈstæn.ʃəl/

insubstantial

不十分な

Meaning

Lacking strength, substance, or solidity.

Example

The evidence provided was insubstantial and unconvincing.

提供された証拠は不十分で説得力がなかった。

C1 adjective /ˌɪnədˈvɜːrtənt/

inadvertent

意図しない, 不注意な

Meaning

Not resulting from or achieved through deliberate planning; unintentional.

Example

Her inadvertent mistake caused a delay in the project.

彼女の不注意なミスがプロジェクトの遅延を引き起こしました。

C1 adjective ˌɪn.krəˈmen.təl

incremental

増分的

Meaning

Relating to or denoting an increase or addition, especially one of a series on a fixed scale; proceeding in small stages.

Example

Incremental changes ensure sustainability.

増分的な変化は持続可能性を確保します。

C1 noun /ˌɪnklɪˈneɪʃən/

inclination

傾向

Meaning

A natural tendency or urge to act or feel in a particular way.

Example

She has an inclination towards helping others.

彼女は他の人を助ける傾向があります。

C1 noun /ɪnˌtɪmɪˈdeɪʃən/

intimidation

威圧

Meaning

The action of frightening or threatening someone to make them do something.

Example

The workers reported cases of intimidation by the management.

労働者たちは経営陣による威圧の事例を報告しました。

C1 noun /ɪmˈpɒs.tər/

Impostor

詐欺師; 偽者

Meaning

a person who pretends to be someone else in order to deceive others; a fraud

Example

The impostor convinced everyone he was a doctor until his fake credentials were discovered.

詐欺師は医者だとみんなを納得させましたが、彼の偽の資格が発覚するまでそれが続きました。

C1 adjective /ɪmˈpæsəbəl/

impassable

通行不可能

Meaning

Impossible to travel along or over.

Example

The road became impassable after the heavy snowfall.

大雪の後、道は通行不可能になりました。

C1 noun /ɪnˈdjuːsmənt/

inducement

誘因

Meaning

something that persuades or encourages someone to do something

Example

The company offered a bonus as an inducement to employees.

会社は従業員にインセンティブとしてボーナスを提供しました。

C1 adjective ˌɪn.tə.dʒen.əˈreɪ.ʃən.əl

intergenerational

世代間、異なる世代間で発生する

Meaning

Existing or occurring between different generations of a family.

Example

Intergenerational wisdom ensures cultural continuity.

インタージェネレーショナルな知恵は文化的継続性を確保する。

C1 noun ˈɪn.fər.əns

inference

推論

Meaning

A conclusion reached on the basis of evidence and reasoning; logical deduction.

Example

Scientists make inferences based on experimental data.

科学者たちは実験データに基づいて推論を行います。

C1 noun /ˌɪnkwɪˈzɪʃən/

inquisition

尋問

Meaning

A prolonged and intense questioning or investigation, often harsh in nature.

Example

The journalist faced an inquisition from the panel about his sources.

ジャーナリストは、自分の情報源に関するパネルからの厳しい尋問に直面した。

C1 adjective /ɪmˈplɔːzəbl/

implausible

信じがたい

Meaning

Not seeming reasonable or probable; unlikely to be true.

Example

The story she told was so implausible that no one believed her.

彼女が話した話はあまりにも信じられないほどで、誰も彼女を信じなかった。

C1 adjective ɪnɪɡˈzɔːstɪbəl

inexhaustible

尽きることのない

Meaning

Unable to be used up or worn out; limitless.

Example

His inexhaustible energy allowed him to work tirelessly on his projects.

彼の尽きることのないエネルギーは、彼がプロジェクトに休むことなく取り組むことを可能にしました。

C1 noun ˌɪn.ɪˈfɪʃ.ən.si

inefficiency

非効率

Meaning

The state or quality of not achieving maximum productivity; failure to make the best use of time or resources.

Example

Government inefficiency leads to slow project completion.

政府の非効率性がプロジェクトの完了を遅らせる。

C1 adjective /ɪˈrɛfjʊtəbəl/

Irrefutable

反論できない

Meaning

impossible to deny or disprove; undeniable

Example

The evidence against him was irrefutable.

彼に対する証拠は否定できないものでした。

C1 verb /ɪnˈkɑːrsəreɪt/

incarcerate

投獄する

Meaning

to imprison or confine someone

Example

The authorities incarcerated the criminal after the trial.

当局は裁判後に犯罪者を投獄しました。

C1 noun /ɪnˈsɜːrdʒəns/

insurgence

反乱

Meaning

An act of rebellion or uprising against authority.

Example

The government struggled to contain the growing insurgence.

政府は増大する反乱を抑制するのに苦労した。

C1 noun /ˈɪn.tə.mə.si/

Intimacy

親密さ; 親しみ

Meaning

close familiarity or friendship; closeness; a private cozy atmosphere

Example

The couple valued the emotional intimacy they shared more than material possessions.

そのカップルは物質的な所有物よりも、共有した感情的な親密さを大切にしていました。

C1 noun /ɪmˈpjʊərəti/

impurity

不純物

Meaning

the state of being unclean or contaminated; a substance that makes something impure

Example

The scientist removed every impurity from the water sample.

科学者は水のサンプルからすべての不純物を取り除いた。

C1 adjective /ɪnˈedəbəl/

Inedible

食べられない

Meaning

not suitable or safe for eating; not edible

Example

The mushrooms were poisonous and completely inedible.

そのキノコは毒性があり、完全に食べられないものでした。

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。

C1 verb /ɪnˈdʌkt/

induct

Meaning

to formally admit someone into a position, organization, or office

Example

She was inducted into the university's honor society.

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。

C1 verb /ɪmˈpɑːrt/

impart

伝える

Meaning

to make information known; to bestow or communicate

Example

The teacher imparted valuable knowledge to her students.

教師は生徒に貴重な知識を授けました。

C1 noun /ˈɪŋ.krə.mənt/

Increment

増加

Meaning

an increase or addition, especially one of a series on a fixed scale; a regular increase in salary

Example

He received an annual increment of five percent in his salary this year.

彼は今年、自分の給料に5パーセントの年次増加を受け取った。

C1 adjective /ɪmˈpæʃənd/

impassioned

情熱的な

Meaning

Filled with or showing great emotion.

Example

She gave an impassioned speech about human rights.

彼女は人権について情熱的なスピーチを行いました。

C1 adjective /ɪnˈsɛnsəbl/

insensible

無意識

Meaning

Unconscious; unaware of or indifferent to something.

Example

He was insensible to the cold as he lay in the snow.

彼は雪の中で横たわっているとき、寒さに無意識でした。

C1 noun /ɪˈrɛlɪvənsi/

irrelevancy

無関係性

Meaning

the state of being unrelated or unimportant to the matter at hand

Example

The judge dismissed the argument because of its irrelevancy to the case.

裁判官はその主張が事件と無関係であるとして退けた。

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 /ɪmˈpjʊər/

Impure

不純

Meaning

contaminated; not clean; mixed with foreign substances

Example

The impure water caused health problems in the village.

不純な水は村で健康問題を引き起こしました。

C1 noun ˌɪn.fɪlˈtreɪ.ʃən

infiltration

浸透、秘密のアクセス

Meaning

The process of entering or gaining access to an organization or place surreptitiously.

Example

Cybersecurity prevents infiltration into sensitive data.

サイバーセキュリティは、機密データへの浸透を防ぎます。

C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

Meaning

Not able to be divided or separated.

Example

The country's unity was indivisible despite differences.

C1 verb /ɪnˈfɛst/

infest

侵入する

Meaning

to overrun in large numbers, especially so as to cause damage or discomfort

Example

The old house was infested with rats.

古い家はネズミで侵されていました。

C1 noun (plural) /ˈɪndɪˌsiːz/

indices

インデックス

Meaning

plural form of index; statistical measures or reference points used for comparison

Example

Stock market indices fell sharply after the announcement.

発表後、株式市場のインデックスは急落しました。

C1 adjective ˌɪn.təˈstel.ər

interstellar

星間の、インターステラ、宇宙の

Meaning

Occurring or situated between stars.

Example

Scientists study interstellar travel possibilities.

科学者たちはインターステラ旅行の可能性を研究しています。

C1 adjective /ɪnˈfæləbl̩/

infallible

間違いない

Meaning

incapable of making mistakes or being wrong

Example

Her judgment seemed infallible in matters of finance.

彼女の判断は財務問題において間違いないように見えた。

C1 adverb /ˌɪn.dɪˈskrɪm.ɪ.nət.li/

Indiscriminately

無差別に

Meaning

without making careful distinctions; randomly; without discrimination

Example

The company fired employees indiscriminately without considering their performance.

会社は従業員を彼らのパフォーマンスを考慮せずに無差別に解雇しました。

C1 noun /ɪnˈfɜːməri/

infirmary

診療所

Meaning

A hospital or place where the sick or injured are cared for.

Example

The school had an infirmary for minor injuries.

学校には軽傷のための診療所がありました。

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。

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.

C1 noun /ˌɪntərˈmɪʃən/

intermission

休憩

Meaning

A pause or break, especially during a performance or event.

Example

The play had a twenty-minute intermission.

その劇には20分間の休憩がありました。

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 /ɪnˈɡreɪnd/

ingrained

根強い

Meaning

Firmly fixed or established; deeply rooted and difficult to change.

Example

His ingrained habits were hard to break.

彼の根強い習慣は壊すのが難しかった。

C1 noun /aɪˈtɪnərɛri/

itinerary

旅程

Meaning

A planned route or schedule of a journey or trip.

Example

The travel agent gave us a detailed itinerary for our vacation.

旅行代理店は私たちの休暇のために詳細な旅程を提供してくれました。

C1 adjective /ˈɪntrɪkət/

intricate

複雑

Meaning

very detailed, complex, and difficult to understand

Example

The artist created an intricate pattern on the wall.

アーティストは壁に複雑な模様を作り出しました。

C1 adjective; noun /ɪˈmɔːrtl/

immortal

不死の

Meaning

living forever; never dying; lasting forever in fame or memory

Example

Legends often describe heroes as immortal beings who never die.

伝説では英雄は不死の存在だとされる。

C1 adjective /ɪnˈvɛntɪv/

inventive

創造的

Meaning

Having the ability to create or design new things or to think originally.

Example

The inventor was known for his inventive solutions to everyday problems.

発明家は日常の問題に対する創造的な解決策で知られていた。

C1 adjective /aɪˈreɪt/

irate

激怒した

Meaning

Extremely angry.

Example

The customer became irate after waiting for hours.

顧客は何時間も待った後、激怒しました。

C1 verb ɪmˈbjuː

Imbue

誰かの心にアイデアや感情を深く浸透させる

Meaning

Mixing some idea or feeling deeply into someone's mind

Example

The teacher tried to imbue students with a love for learning.

教師は学生に学びへの愛を伝えようとした。

C1 noun /ˈɪn.floʊ/

inflow

流入

Meaning

The movement of things such as money, people, or water into a place.

Example

The inflow of tourists boosted the local economy.

観光客の流入が地域経済を活性化させた。

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。

C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

輸入

Meaning

The act of bringing goods or services into a country from abroad

Example

The importation of luxury goods is strictly regulated.

高級品の輸入は厳しく規制されています。

C1 noun /ɪnˈsæn.ə.ti/

Insanity

狂気; 精神疾患

Meaning

the state of being seriously mentally ill; extreme foolishness or irrationality

Example

The defense lawyer argued that his client was not guilty by reason of insanity.

弁護人は、被告人が狂気によって無罪であると主張した。

C1 adverb /ˈɪnwərdli/

inwardly

内面的に

Meaning

In the mind or spirit; not outwardly visible.

Example

She smiled outwardly but inwardly she was worried.

彼女は外見では微笑んだが、内心では心配していた。

C1 adjective /ˌɪndɪˈstɪŋkt/

indistinct

不明瞭な

Meaning

Not clear or sharply defined; vague or blurred.

Example

The sound of voices was indistinct in the distance.

遠くからの声は不明瞭でした。

C1 noun /ˈɪnkwest/

inquest

調査

Meaning

A legal or official inquiry, especially into the cause of a death.

Example

The inquest revealed the cause of the accident.

調査は事故の原因を明らかにしました。

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。

C1 noun /ɪmˌpɜː.sənˈeɪ.ʃən/

impersonation

なりすまし

Meaning

The action of pretending to be another person for the purpose of entertainment or fraud.

Example

Online impersonation is a serious cybercrime.

オンラインでのなりすましは重大なサイバー犯罪です。

C1 noun /ˈɪnkjʊˌbeɪtər/

incubator

インキュベーター

Meaning

a device or environment that provides suitable conditions for eggs, cells, or infants to develop

Example

The premature baby was placed in an incubator for care.

未熟児はケアのためにインキュベーターに入れられました。

C1 adjective /ˌɪnækˈsɛsəbl/

inaccessible

アクセスできない

Meaning

unable to be reached, entered, or understood

Example

The remote village is almost inaccessible during the rainy season.

その遠隔地の村は雨季にはほとんどアクセスできません。

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 ɪmˈpɛkəbl

impeccable

完璧な

Meaning

In accordance with the highest standards; faultless.

Example

His impeccable taste in fashion was admired by all his peers.

彼の完璧なファッションセンスは、すべての同僚に賞賛されました。

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。