C1 adjective /ˌɪlɪˈdʒɪtɪmət/

illegitimate

不正

Meaning

Not authorized by law, rules, or standards; not recognized as valid.

Example

The court ruled the contract to be illegitimate.

裁判所は契約が不正であると判断しました。

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。

C1 noun /ˈɪŋklɪŋ/

inkling

予感

Meaning

A slight idea, hint, or suspicion about something.

Example

She had an inkling that he was planning a surprise.

彼女は彼がサプライズを計画しているという予感を持っていた。

C1 noun /ˈɪntrɪkəsi/

intricacy

複雑さ

Meaning

the quality of being very detailed or complicated

Example

The intricacy of the design impressed everyone.

デザインの複雑さは全員を感動させました。

C1 adjective /ɪmˈpɛn.ɪ.trə.bəl/

impenetrable

Meaning

Impossible to pass through or enter; impossible to understand.

Example

The dense forest was nearly impenetrable.

C1 noun ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

先住民の伝統

Meaning

Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.

Example

Indigenous traditions in the Chittagong Hill Tracts are unique.

チッタゴン丘陵地帯の先住民の伝統はユニークです。

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。

C1 verb /ɪmˈpɒvərɪʃ/

impoverish

貧困にする

Meaning

To make someone poor or reduce the quality or richness of something.

Example

The long war impoverished the entire nation.

長い戦争が国全体を貧困にした。

C1 verb /ɪnˈterəˌɡeɪt/

interrogate

尋問する

Meaning

to ask someone questions in a thorough and formal way; to question intensively

Example

The police interrogated the suspect for hours.

警察は容疑者を何時間も尋問した。

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 adjective /ˈɪnsjələr/

insular

狭い心の、島に関連する

Meaning

Narrow-minded, isolated, or relating to an island.

Example

The community was criticized for its insular attitudes toward outsiders.

そのコミュニティは外部の人々に対する狭量な態度で批判されました。

C1 noun /ˌɪndɪˈdʒɛstʃən/

indigestion

Meaning

Discomfort or pain in the stomach associated with difficulty in digesting food.

Example

He avoided spicy food because it often gave him indigestion.

C1 noun /ɪnˈdem.nə.ti/

Indemnity

補償

Meaning

security or protection against a loss or other financial burden; compensation for damage or loss

Example

The insurance company provided full indemnity for the damages caused by the flood.

保険会社は洪水による損害に対して完全な補償を提供しました。

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 /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。

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 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 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 /ɪˈluː.sɪv/

Illusive

幻想的な; 存在しているように見えるが実際には存在しない; 騙すような

Meaning

deceptive; appearing to exist but not real; misleading

Example

The promise of easy money proved to be illusive and misleading.

簡単なお金の約束は幻想的であり、誤解を招くものでした。

C1 noun /ˌɪntɪˈmeɪʃən/

intimation

示唆

Meaning

A subtle or indirect hint or suggestion.

Example

She gave no intimation of her plans.

彼女は自分の計画について何の示唆も与えなかった。

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 adjective /ɪˈmækjələt/

immaculate

完璧

Meaning

perfectly clean, neat, or free from flaws

Example

Her room was immaculate, with everything in its place.

彼女の部屋は完璧で、すべてが所定の位置にありました。

C1 adjective /ɪˈlɪsɪt/

illicit

不法な

Meaning

Forbidden by law, rules, or custom.

Example

The police shut down the illicit drug operation.

警察は不法な麻薬取引を閉鎖しました。

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 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 verb /ˌɪn.tɚˈtwaɪn/

intertwine

密接に接続またはリンクする; 一緒にねじるまたは密接に結合する

Meaning

To connect or link closely; to twist together or combine closely.

Example

Their lives became intertwined through years of friendship.

彼らの生活は長年の友情を通じて絡み合った。

C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

イデオロギー的

Meaning

Relating to or based on a system of ideas or beliefs.

Example

The two parties are divided by deep ideological differences.

二つの党は深いイデオロギー的な違いによって分裂している。

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 adjective /ɪnˈhɛrənt/

inherent

固有の

Meaning

Existing in something as a natural, permanent, or essential quality.

Example

There are inherent risks in extreme sports.

エクストリームスポーツには固有のリスクが存在する。

C1 adjective /ɪˈrɛvəkəbl/

irrevocable

取り消し不可能

Meaning

Not able to be revoked, changed, or undone.

Example

She made an irrevocable decision to leave the company.

彼女は会社を辞めるという取り消し不可能な決定を下した。

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 noun /ɪnˈtruː.ʒən/

intrusion

不正侵入

Meaning

Unauthorized entry into a system or place without permission

Example

The company detected an intrusion in its server.

会社はサーバーに侵入を検出しました。

C1 verb /ˈaɪdəlaɪz/

idolize

偶像視する

Meaning

To admire or worship someone excessively.

Example

Fans often idolize celebrities for their talent and lifestyle.

ファンはしばしばその才能とライフスタイルのために有名人を偶像視します。

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 adjective /ɪnˈɔːdəbl/

inaudible

聞こえない

Meaning

Unable to be heard.

Example

Her voice was almost inaudible over the noise.

その音の中で彼女の声はほとんど聞こえなかった。

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 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 /ɪnˈdɪɡnənt/

indignant

憤慨した

Meaning

Feeling or showing anger at something considered unfair or unjust.

Example

She was indignant when accused of cheating.

彼女は不正行為を非難されたとき、憤慨していた。

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 adjective /ɪnˈvɜːs/

Inverse

逆の; 反対の

Meaning

opposite in order, nature, or effect; reversed

Example

There is an inverse relationship between price and demand.

価格と需要の間に逆の関係があります。

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 /ɪmˈpɛdɪmənt/

impediments

障害

Meaning

A hindrance or obstruction in doing something; things that prevent progress or achievement.

Example

Economic impediments often hinder social development.

経済的な障害はしばしば社会的発展を妨げる。

C1 adjective /ɪˈrɛpərəbəl/

Irreparable

修復不可能

Meaning

impossible to repair or fix; permanent damage that cannot be undone

Example

The accident caused irreparable damage to his spine.

その事故は彼の背骨に修復不可能な損傷を与えました。

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 /ɪmˈprɒmp.tjuː/

impromptu

即興

Meaning

Done without being planned, organized, or rehearsed; spontaneous.

Example

He gave an impromptu speech at the event.

彼はイベントで即興のスピーチを行いました。

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 /ɪˈneɪn/

inane

無意味な, 馬鹿な

Meaning

lacking sense, meaning, or significance; silly or pointless

Example

The movie was criticized for its inane dialogue.

その映画は無意味なセリフで批判された。

C1 adjective /ɪnˈtrɛpɪd/

intrepid

勇敢な

Meaning

fearless and adventurous, often used humorously

Example

The intrepid traveler explored the jungle alone.

その勇敢な旅行者は一人でジャングルを探検した。

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 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 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。

C1 adverb /ɪnˈdɛfɪnətli/

indefinitely

無期限で

Meaning

for an unlimited or unspecified period of time

Example

The project has been postponed indefinitely.

プロジェクトは無期限で延期されました。

C1 adjective /ɪnˈdʌldʒənt/

indulgent

寛容な

Meaning

Having a tendency to be overly generous or lenient with someone.

Example

The indulgent mother allowed her child to stay up late.

寛容な母は子供を遅くまで起きていることを許しました。

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 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。

C1 noun /ˈɪn.tə.lekt/

intellect

知能

Meaning

The ability to think, reason, and understand objectively.

Example

Her intellect is admired by all her colleagues.

彼女の知能はすべての同僚に賞賛されています。

C1 adjective ˈɪn.tər.ɪm

interim

暫定的

Meaning

In or for the intervening period; provisional or temporary.

Example

Interim governments manage transitional phases.

暫定政府は移行段階を管理します。

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。

C1 adjective /ɪnˈdʌstriəs/

industrious

勤勉な

Meaning

Hardworking and diligent in one's duties.

Example

She is an industrious student who always completes her assignments on time.

彼女は常に期限通りに課題を終わらせる勤勉な学生です。

C1 noun /ɪnˈtɛstɪn/

intestine

腸

Meaning

The part of the digestive system where food is digested and absorbed, extending from the stomach to the anus.

Example

The doctor explained how nutrients are absorbed in the small intestine.

医者は、小腸で栄養素がどのように吸収されるかを説明しました。

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 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 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 noun /ˌɪnkɑːrˈneɪʃən/

incarnation

化身

Meaning

the embodiment of a deity, spirit, or quality in a physical form

Example

The monk was considered the incarnation of compassion.

その僧侶は慈悲の化身と見なされていた。

C1 adjective /ɪnˈhjuːmən/

Inhuman

非人道的

Meaning

lacking human qualities of compassion and mercy; cruel or barbaric

Example

The prisoners were kept in inhuman conditions.

囚人たちは非人道的な状況で収容されていました。

C1 adjective /ɪnˈflæməbəl/

Inflammable

可燃; 発火性

Meaning

easily set on fire; flammable; combustible

Example

The inflammable material caught fire quickly.

その可燃性材料はすぐに火をつけました。

C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

Meaning

Not able to be divided or separated.

Example

The country's unity was indivisible despite differences.

C1 noun /ˌɪn.dɪˈsɪʒ.ən/

Indecision

優柔不断; 決断力の欠如; 迷い

Meaning

the inability to make decisions quickly; uncertainty about what to do

Example

Her indecision about which job offer to accept caused her to miss both opportunities.

どの仕事のオファーを受けるかについての優柔不断さが、両方のチャンスを逃す原因となった。

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 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 adjective /ɪmˈpɛtʃ.u.əs/

impetuous

衝動的な

Meaning

Acting or done quickly and without thought or care; impulsive.

Example

His impetuous decision led to unexpected consequences.

彼の衝動的な決断は予想外の結果を招いた。

C1 adjective /ɪnˈdiːsənt/

indecent

不品な

Meaning

not conforming to accepted standards of behavior or morality; improper or offensive

Example

He was warned for making an indecent remark during the meeting.

彼は不品な発言で注意された。

C1 verb /ɪnˈtɒksɪkeɪt/

intoxicate

幸せ

Meaning

to make someone lose control of their faculties or behavior due to alcohol or drugs

Example

The strong drink quickly intoxicated him.

彼女は賞を受け取ったとき、自分の幸せを隠すことができなかった。

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。

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 noun ˌɪn.tuˈɪʃ.ən

intuition

直感

Meaning

The ability to understand something immediately, without the need for conscious reasoning.

Example

Her intuition told her something was wrong.

彼女の直感は何かが間違っていると言った。

C1 noun /ˌɪn.trəˈvɜːr.ʒən/

introversion

内向

Meaning

The tendency to be inward-looking and shy, preferring solitary activities.

Example

Her introversion made it difficult for her to enjoy large parties.

彼女の内向的な性格は、大きなパーティーを楽しむのを難しくした。

C1 noun /ˈɪnˌmeɪt/

inmate

囚人

Meaning

a person confined to an institution such as a prison or hospital

Example

The prison has over a thousand inmates.

刑務所には千人以上の囚人がいます。

C1 noun /ˈɪnlɛt/

inlet

入り江

Meaning

A small arm of the sea, a lake, or a river; an opening or passage for entry.

Example

The boat entered a narrow inlet along the coast.

船は海岸沿いの狭い入り江に入った。

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。

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 adjective /ɪnˈsʌf.ər.ə.bəl/

insufferable

耐え難い

Meaning

Too extreme to bear; intolerable.

Example

The heat during the summer was insufferable.

夏の暑さは耐え難かった。

C1 noun /ɪˈnɜː.ʃə/

Inertia

慣性; 活動の欠如

Meaning

a tendency to do nothing or remain unchanged; lack of activity or movement

Example

The team's inertia prevented them from adapting to the rapidly changing market conditions.

チームの慣性は、急速に変化する市場の状況に適応するのを妨げました。

C1 adjective ˌɪn.təˈmɪt.ənt

intermittent

断続的

Meaning

Happening irregularly, not continuously.

Example

The rain was intermittent throughout the day.

雨は一日中断続的でした。

C1 noun ˌɪnfɛsˈteɪʃən

infestation

侵入, 異常に大量の昆虫や動物がある場所に存在すること

Meaning

The presence of an unusually large number of insects or animals in a place, causing damage or disease.

Example

The infestation of ants in the kitchen led to immediate pest control measures.

キッチンにおけるアリの侵入は、即座に害虫駆除対策を講じる結果となった。

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 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.

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 adjective /ɪnˈfleɪtɪd/

inflated

膨らんだ

Meaning

excessively increased in size, value, or importance; filled with air or gas

Example

The company faced criticism for its inflated prices.

その会社は膨らんだ価格で批判を受けました。

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 /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 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 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 /ɪnˈflɛksəbl/

inflexible

柔軟性がない

Meaning

Not able to bend or change; unwilling to change ideas or behavior.

Example

His inflexible attitude made negotiations difficult.

彼の柔軟性がない態度は交渉を難しくしました。

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 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 verb /ˈɪmplɪˌkeɪt/

implicate

関与する

Meaning

To show someone’s involvement in a crime or wrongdoing.

Example

The evidence implicated several officials in the scandal.

証拠はスキャンダルに関与した何人かの職員を示した。

C1 noun /ɪnˈvɜːrʒən/

inversion

逆転

Meaning

A reversal of the normal order, position, or relationship.

Example

In poetry, inversion is often used to create emphasis.

詩では、逆転は強調を作るためによく使われます。

C1 noun /ˈɪntərˌpleɪ/

interplay

相互作用

Meaning

The way in which two or more things have an effect on each other.

Example

The interplay between culture and technology shapes modern life.

文化と技術の相互作用が現代生活を形作っています。

C1 noun /ˈɪrɪtənt/

irritant

刺激物

Meaning

something that causes irritation or discomfort

Example

Dust is a common irritant for people with allergies.

ほこりはアレルギーを持つ人々にとって一般的な刺激物です。

C1 noun /ˈɪm.pæs/

impasse

行き詰まり

Meaning

A situation where no progress is possible.

Example

The negotiations reached an impasse, delaying the agreement.

交渉は行き詰まり、合意が遅れた。

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 verb /ˌɪntəˈsɛkt/

intersect

交差する

Meaning

to cross or pass through each other

Example

The two roads intersect at the city center.

二つの道路は市内中心で交差する。

C1 adjective /ˌɪnəˈtɛntɪv/

inattentive

不注意な

Meaning

not paying attention; lacking focus or concentration

Example

The inattentive student missed several important instructions.

不注意な学生は重要な指示をいくつも逃した。

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 noun /ˌɪmɔːrˈtæləti/

immortality

不死; 永遠の命

Meaning

the state of living forever; eternal life or lasting fame beyond death

Example

Many ancient cultures believed that heroes could achieve immortality through great deeds.

多くの古代文化では、英雄が偉業によって不死を得られると信じられていた。

C1 noun /ɪnˈædɪkwəsi/

inadequacy

不十分さ

Meaning

lack of sufficient ability, quality, or strength; a feeling of not being good enough

Example

She struggled with feelings of inadequacy at work despite her strong qualifications.

十分な資格があるにもかかわらず、彼女は職場で不十分さを感じていた。

C1 adjective ˈɪn.lənd

Inland

内陸

Meaning

Situated in the interior of a country; away from the coast.

Example

Inland transport boosts local trade.

内陸輸送は地元の貿易を促進します。

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 /ɪnˈfɜːm/

infirm

虚弱

Meaning

Weak, especially due to old age or illness.

Example

The infirm old man needed assistance to walk.

その虚弱な老人は歩くために助けが必要でした。

C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

不規則性

Meaning

lack of regularity or consistency; a deviation from what is normal, expected, or orderly

Example

The audit revealed several financial irregularities in the company’s records.

監査により、その会社の記録にいくつかの財務上の不規則性が明らかになった。

C1 adjective /ˌɪnˌkɒnsɪˈkwɛnʃəl/

inconsequential

重要でない

Meaning

Not important or significant; too small to matter.

Example

The mistake was minor and inconsequential.

その間違いは小さく、重要ではありませんでした。

C1 verb /aɪˈdiː.ə.laɪz/

idealize

理想化する

Meaning

To regard or represent something as perfect or better than it really is.

Example

Children often idealize their parents.

子供たちはしばしば親を理想化します。

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。

C1 noun /ɪˈreləvəns/

irrelevance

無関係性

Meaning

the quality of not being connected to or important for a particular matter; lack of significance

Example

His long explanation only highlighted the irrelevance of the details to the main issue.

彼の長い説明は、細部が主な問題と無関係であることを強調しただけだった。

C1 noun /ˌɪntəkəˈnɛktɪvɪti/

interconnectivity

相互接続性

Meaning

The state of being interconnected or the degree of connectivity between components

Example

The rise of interconnectivity has transformed global communication.

インターコネクティビティの発展は、世界中のコミュニケーションを変革しました。

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 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

取り返しのつかない損害

Meaning

Harm or injury that cannot be undone or repaired.

Example

Climate change causes irreversible damage to ecosystems.

気候変動は生態系に取り返しのつかない損害を与えます。

C1 adjective /ɪmˈpɑːrʃəl/

Impartial

公正; 中立的

Meaning

treating all sides fairly; unbiased; neutral

Example

A good judge must remain impartial throughout the trial.

優れた裁判官は裁判中に公正を保たなければなりません。

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 /ˌɪndɪˈsaɪsɪv/

Indecisive

優柔不断な

Meaning

unable to make decisions quickly; hesitant; wavering

Example

She was indecisive about which university to attend.

彼女はどの大学に入学すべきか決めかねていた。