C2 adjective /ˌɪnɔːˈspɪʃəs/

Inauspicious

不吉

Meaning

unlucky; showing signs that future success is unlikely; unfavorable

Example

The dark clouds seemed inauspicious for the wedding.

暗い雲は結婚式にとって不吉に思えた。

C2 adjective /ɪnˈæpt/

Inapt

不適切; 不適当

Meaning

not suitable; inappropriate; unfit

Example

His comment was inapt for the formal meeting.

彼のコメントは正式な会議には不適切でした。

C2 adjective /ˌɪɡ.nəˈmɪn.i.əs/

ignominious

不名誉な

Meaning

Marked by shame, disgrace, or humiliation.

Example

The team suffered an ignominious defeat in the finals.

チームは決勝で不名誉な敗北を喫した。

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。

C2 verb ɪmˈbaɪb

imbibe

吸収する, 同化する, 飲む

Meaning

Absorb or assimilate ideas or knowledge. To drink or take in.

Example

He tried to imbibe the wisdom from his mentor.

彼は師匠から知恵を吸収しようとした。

C2 adjective /ˈɪmənənt/

immanent

内在的

Meaning

existing or operating within; inherent

Example

He believed that moral values are immanent in human nature.

彼は道徳的価値が人間の本性に内在していると信じていました。

C2 adjective /ˌɪnkɔːrˈpɔːriəl/

incorporeal

無形

Meaning

lacking a physical body; not composed of matter; intangible

Example

Ghosts are often described as incorporeal beings.

ゴーストはしばしば無形の存在として描かれます。

C2 adjective /ˌɪnkænˈdɛsənt/

incandescent

白熱

Meaning

emitting light as a result of being heated; extremely bright or passionate

Example

The incandescent lamp lit up the entire hall.

白熱灯はホール全体を照らしました。

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。

C2 verb /ˌɪnkəˈpæsɪteɪt/

incapacitate

無力化する

Meaning

to deprive someone or something of the ability or strength to function

Example

The severe injury incapacitated the player for the rest of the season.

その重傷はプレーヤーをシーズンの残りの期間無力化させた。

C2 adjective /ˌɪnɪkˈspiːdiənt/

inexpedient

不適切

Meaning

Not advisable, suitable, or practical in the circumstances.

Example

It would be inexpedient to invest without proper research.

適切な調査なしで投資することは不適切です。

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 /ɪnˈvɛtərət/

inveterate

常習的な

Meaning

having a long-established habit, activity, or interest that is unlikely to change

Example

He is an inveterate reader who spends hours in the library every day.

彼は毎日数時間を図書館で過ごす常習的な読者です。

C2 adjective /ɪnˈkoʊ.ɪt/ or /ɪnˈkoʊ.eɪt/

inchoate

未完成

Meaning

Just begun and not fully formed; rudimentary.

Example

His inchoate ideas needed more research to be developed.

彼の未完成のアイデアは、さらに開発するためにもっと研究が必要だった。

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。

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 /ɪnˈsɪɡniə/

insignia

徽章

Meaning

A badge or symbol that shows rank, position, or membership.

Example

The soldier proudly wore the insignia of his regiment.

兵士は誇らしげに自分の連隊の徽章を身に着けていました。

C2 noun /ˈɪmɪˌteɪtər/

imitator

模倣者

Meaning

a person who copies the behavior, style, or actions of others

Example

He became famous as an imitator of popular singers.

彼は人気のある歌手の模倣者として有名になった。

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。

C2 verb /ɪmˈpjuːn/

impugn

Meaning

to dispute the truth, validity, or honesty of a statement or motive

Example

The lawyer tried to impugn the credibility of the witness.

C2 adjective /ɪnˈtɛmpərət/

intemperate

不節制な

Meaning

Lacking self-control; immoderate, especially in indulgence.

Example

The politician's intemperate remarks caused controversy.

政治家の不節制な発言は論争を引き起こした。

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 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。

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。

C2 adjective /ɪnˈkɑːdʒɪtənt/

incogitant

無思慮な

Meaning

Lacking thought; inconsiderate or thoughtless.

Example

It was incogitant of him to make such a rude comment.

彼がそんな失礼なコメントをするのは無思慮なことでした。

C2 noun /ɪnˈkɒnstənsi/

inconstancy

不安定さ

Meaning

The quality of changing frequently or being unreliable.

Example

The inconstancy of the weather makes planning difficult.

天候の不安定さが計画を難しくします。

C2 adjective /ɪnˈsɛndiˌɛri/

incendiary

扇動的な / 挑発的な

Meaning

designed to cause fires or stir up conflict

Example

The politician’s incendiary remarks angered the crowd.

政治家の挑発的な発言が群衆を怒らせた。

C2 noun /ɪnˌtɛl.ɪˈdʒɛntsi.ə/

intelligentsia

インテリゲンチャ

Meaning

The group of people engaged in intellectual and cultural pursuits in a society.

Example

The intelligentsia played a key role in shaping public opinion.

インテリゲンチャは、世論形成において重要な役割を果たした。

C2 noun /ɪnˈdɛntʃər/

indenture

Meaning

A formal legal agreement, contract, or document, often relating to work or service.

Example

In the 18th century, many workers came under indenture to work overseas.

C2 adjective /ˌɪntərˈniːsaɪn/

internecine

内部紛争

Meaning

Relating to conflict within a group, often causing mutual destruction.

Example

The internecine conflict weakened the organization from within.

内部紛争は組織を内部から弱体化させた

C2 adjective /ɪnˈsuːsiənt/

insouciant

無頓着

Meaning

Showing a casual lack of concern; carefree.

Example

He gave an insouciant shrug and walked away.

彼は無頓着に肩をすくめて、歩き去った。

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 /ˌɪnæprɪˈhɛnsəbl/

inapprehensible

理解不能

Meaning

not understandable; incomprehensible

Example

The concept was so abstract that it seemed inapprehensible to most students.

その概念は非常に抽象的で、ほとんどの学生には理解できないように思えた。

C2 adjective /ɪˈrɛzəluːt/

irresolute

優柔不断

Meaning

uncertain or indecisive; lacking determination

Example

He stood irresolute at the crossroads, unsure which path to take.

彼は交差点で優柔不断に立ち、どの道を取るべきか決められなかった。

C2 verb /ɪnˈɡrɑːft/

ingraft

根付ける

Meaning

To implant or fix deeply, often used in the sense of grafting an idea or quality.

Example

The teacher tried to ingraft good manners in the students.

先生は生徒たちに良いマナーを根付かせようとした。

C2 adjective /ɪnˈɛk.wɪ.tə.bəl/

inequitable

不公平な

Meaning

Not fair or just; lacking in fairness or equality.

Example

The distribution of resources was inequitable among the workers.

リソースの分配は労働者の間で不平等でした。

C2 noun /ɪnˈtɒksɪkənt/

intoxicant

酔わせる物質

Meaning

a substance, especially alcohol or a drug, that causes intoxication

Example

Alcohol is the most commonly used intoxicant in many cultures.

アルコールは多くの文化で最も一般的に使用される酔わせる物質です。

C2 adjective /ˌɪrɪˈkɒnsɪləbl/

irreconcilable

和解できない

Meaning

impossible to make compatible or bring into harmony; unable to resolve differences

Example

The couple separated due to irreconcilable differences.

そのカップルは和解できない違いのために別れました。

C2 noun /ɪnˈkwɪzɪtər/

inquisitor

尋問者

Meaning

A person who asks many questions, often in an official or harsh manner.

Example

The inquisitor demanded detailed answers from the witness.

尋問者は証人から詳細な回答を要求しました。

C2 adverb /ˈɪntʃmiːl/

inchmeal

少しずつ

Meaning

Gradually, little by little.

Example

The old castle fell inchmeal into ruin.

その古い城は少しずつ廃墟になった。

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 /ˌɪnkəˈməʊdiəs/

incommodious

不快な

Meaning

Uncomfortably small, cramped, or inconvenient.

Example

We had to stay in an incommodious room during the trip.

旅行中に不快な部屋に泊まらなければなりませんでした。

C2 adjective /ˌɪnˈekspɜːrt/

inexpert

未熟な

Meaning

not skilled or experienced; lacking expertise

Example

The inexpert handling of the machine caused several mistakes.

機械の未熟な扱いがいくつかのミスを引き起こした。

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。

C2 adjective /ˌɪndɪˈvɜːrtɪbəl/

indivertible

Meaning

Not able to be turned aside or diverted.

Example

The judge's indivertible attention was on the case.

C2 adjective /ɪnˈvaɪələt/

inviolate

汚されていない

Meaning

free from violation, injury, or desecration; kept safe and untouched

Example

The ancient temple remained inviolate for centuries.

古代の寺院は何世紀にもわたって汚されることなく保たれました。

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。

C2 noun /ɪnˈɡrætɪˌtjuːd/

ingratitude

恩知らず

Meaning

Lack of gratitude; failure to show thanks or appreciation.

Example

His ingratitude hurt her feelings after all she had done for him.

彼の恩知らずは、彼女が彼のために多くのことをした後、彼女の気持ちを傷つけた。

C2 adjective /ɪˈrædɪkəbəl/

irradicable

根絶不可能な

Meaning

not able to be eradicated; impossible to destroy or remove completely

Example

The love of a mother for her child is irradicable.

母親の子供への愛は根絶不可能です。

C2 adjective/noun /ɪnˈkɑːrnədiːn/

incarnadine

深紅

Meaning

a bright crimson or pinkish-red color

Example

The sky turned incarnadine at sunset.

太陽が沈むと空は深紅色に変わった。

C2 adjective /ˌɪrɪˈprəʊtʃəbl̩/

irreproachable

非の打ち所がない

Meaning

Beyond criticism; faultless.

Example

The judge was known for his irreproachable integrity.

その裁判官は非の打ち所がない誠実さで知られていた。

C2 verb /ˈɪmprɛɡneɪt/

impregnate

妊娠させる / 飽和させる

Meaning

To make pregnant; to fill or saturate with something.

Example

The scientist used a method to impregnate the material with resin.

科学者は樹脂で素材をインプレグネイトする方法を使用しました。

C2 adjective /ɪnhɑːrˈmoʊniəs/

Inharmonious

不協和音

Meaning

lacking harmony; discordant in sound; not in tune

Example

The inharmonious sounds from the broken piano made everyone cover their ears.

壊れたピアノからの不協和音がみんなを耳をふさがせました。

C2 noun /ˈɪn.tɪ.ɡreɪ.tɪv dɪˈpləʊ.mə.si/

integrative diplomacy

統合的外交

Meaning

A diplomatic approach that seeks to combine or coordinate different elements, interests, or parties into a unified whole.

Example

Integrative diplomacy strengthens alliances.

統合的外交は同盟を強化する。

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。

C2 verb /ɪˈnjʊər/

inure

慣れる

Meaning

To become accustomed to something, especially something unpleasant.

Example

Soldiers quickly became inured to the harsh conditions.

兵士たちはすぐに過酷な状況に慣れました。

C2 adjective /ˌɪnsəˈluːbriəs/

insalubrious

不健康

Meaning

Unhealthy or not conducive to well-being.

Example

They moved out of the insalubrious neighborhood for the sake of their health.

彼らは健康のために不健康な地域から引っ越しました

C2 noun /aɪˈdɒlətri/

idolatry

偶像崇拝

Meaning

The worship of idols or extreme admiration for someone or something.

Example

The priest condemned the idolatry practiced in the village.

司祭は村で行われている偶像崇拝を非難した。

C2 noun /ɪnˈsɪpiəns/

incipience

始まり

Meaning

the beginning or initial stage of something

Example

The project was still in its incipience when funding was approved.

資金提供が承認された時、プロジェクトはまだその始まりの段階にありました。

C2 adjective /ɪnˈseɪʃiət/

insatiate

飽くなき

Meaning

impossible to satisfy; always wanting more

Example

He had an insatiate desire for power.

彼は権力への飽くなき欲望を持っていた。

C2 noun /ˌɪrɪˈdɛsəns/

iridescence

虹色の輝き

Meaning

a play of lustrous, changing colors like those of a rainbow

Example

The butterfly's wings shimmered with iridescence.

蝶の羽は虹色の輝きで輝いていました。

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。

C2 noun /ɪkˈsɔːr.ə/

Ixora

イクソラ

Meaning

a tropical flowering shrub with clusters of small bright red, orange, or yellow flowers

Example

The bright red ixora bushes lined the pathway to the tropical garden.

明るい赤いイクソラの低木が熱帯庭園への小道を囲んでいました。

C2 noun /ˈɪnˌɡreɪt/

ingrate

Meaning

An ungrateful person; someone who shows no appreciation.

Example

He worked hard for his friend, but the ingrate never thanked him.

C2 noun /ˌɪmprəˈpraɪəti/

impropriety

不正行為

Meaning

Failure to observe standards of honesty or modesty; improper behavior.

Example

The politician was accused of financial impropriety.

その政治家は財政的不正行為で告発されました。

C2 noun /ˈɪrɪɡənt/

irrigant

灌漑液

Meaning

A liquid used for irrigation, especially in medical or agricultural contexts.

Example

The doctor used a sterile irrigant during the procedure.

医師は手術中に無菌の灌漑液を使用しました。

C2 adjective /ɪnˈdjuːbɪtəbl/

indubitable

疑う余地がない

Meaning

Impossible to doubt; unquestionable.

Example

It is indubitable that hard work leads to success.

努力すれば成功に繋がることは疑う余地がない。

C2 noun /ˈaɪdlər/

idler

怠け者

Meaning

A person who avoids work or spends time lazily.

Example

He was known as an idler who wasted his days.

彼は自分の時間を無駄にするアイドラーとして知られていました。

C2 adjective /ˌɪnˌɑːpərˈtuːn/

inopportune

タイミングが悪い瞬間

Meaning

Happening at a bad or inconvenient time.

Example

His call came at the most inopportune moment.

彼の電話は最もタイミングが悪い瞬間にかかってきた。

C2 adjective /ˌɪnfɪnɪˈtɛsɪməl/

infinitesimal

微細な

Meaning

Extremely small in size or amount; so tiny as to be almost negligible.

Example

The error was so infinitesimal that it didn’t affect the results.

そのエラーは非常に微細で、結果に影響を与えることはありませんでした。

C2 adjective /ɪnˈsɪpiənt/

incipient

初期の

Meaning

in an initial stage; beginning to develop

Example

The incipient storm made the sky turn dark and heavy.

初期の嵐が空を暗く重くさせた。

C2 adjective /ɪˈlɪbərəl/

illiberal

非リベラル

Meaning

Opposed to liberal principles; restricting freedom of thought or behavior.

Example

The government was criticized for its illiberal policies.

政府はその非リベラルな政策について批判された。

C2 verb /ˌɪntərˈlɒk/

interlock

かみあう

Meaning

to fit or connect together securely so that two or more things are joined

Example

The gears interlock to ensure smooth movement of the machine.

ギアは機械のスムーズな動作を確保するために噛み合います。

C2 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

修復不可能

Meaning

Impossible to cure, repair, or remedy.

Example

The damage to the ancient manuscript was irremediable.

古代の写本への損傷は修復不可能でした。

C2 adjective /ˈɪkθiɪk/

ichthyic

魚のような

Meaning

Relating to or resembling fish.

Example

The artist's painting had an ichthyic quality.

アーティストの絵には魚のような特徴がありました。

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 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。

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。

C2 verb /ɪnˈveɪɡəl/

inveigle

誘惑する

Meaning

To persuade someone to do something by deception or flattery.

Example

She inveigled him into signing the contract.

彼女は彼に契約書に署名させた。

C2 adverb /ˌɪnsəʊˈmʌtʃ/

insomuch

これほど

Meaning

to such an extent

Example

He was insomuch tired that he could hardly stand.

彼はあまりにも疲れていて、ほとんど立つことができませんでした。

C2 adjective /ɪnˈdʒɛnjuəs/

ingenuous

無邪気

Meaning

Innocent, naive, and unsuspecting; showing childlike simplicity and sincerity.

Example

Her ingenuous smile revealed her genuine kindness.

彼女の無邪気な笑顔は彼女の本当の優しさを明らかにしました。

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。

C2 adjective /ˌɪrɛvəˈrɛnʃəl/

irreverential

無礼な

Meaning

Showing a lack of respect for things that are generally taken seriously.

Example

His irreverential humor often shocked traditional audiences.

彼の無礼なユーモアはしばしば伝統的な観客を驚かせました。

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。

C2 noun /ˌɪnkrɪˈdjuːləti/

incredulity

不信

Meaning

the state of being unwilling or unable to believe something

Example

She looked at him with incredulity after hearing the strange story.

彼女はその奇妙な話を聞いた後、不信のまなざしで彼を見つめた。

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 verb /ɪnˈdɛmnɪfaɪ/

indemnify

Meaning

to compensate someone for harm or loss; to secure against future damage or cost

Example

The insurance company agreed to indemnify the client for the damages.

C2 noun /ˌɪn.trəˈɡreʃ.ən/

introgression

遺伝子流入

Meaning

The transfer of genetic information from one species to another through repeated backcrossing.

Example

Introgression plays a significant role in plant breeding.

イントログレッションは植物育種において重要な役割を果たします。

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。

C2 adjective /ɪmˈpɛn.ɪ.tənt/

impenitent

後悔しない

Meaning

Not feeling regret or shame about one's actions.

Example

The criminal remained impenitent after the trial.

犯人は裁判後も後悔しないままでした。

C2 noun /ˌɪn.ɪˈbraɪ.ə.ti/

inebriety

酩酊

Meaning

the state of being drunk or intoxicated

Example

His frequent inebriety led to the loss of his job.

彼の頻繁な酩酊は仕事を失う原因となった。

C2 noun /ɪnˈtɛɡ.jʊ.mənt/

integument

外皮

Meaning

A natural outer covering, such as skin, shell, or rind.

Example

The snake sheds its integument as it grows.

ヘビは成長するにつれて外皮を脱ぎます。

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。

C2 adjective /ɪnˈsuːpərəbl/

insuperable

克服できない

Meaning

Impossible to overcome or surpass.

Example

The team faced insuperable challenges during the expedition.

チームは遠征中に克服できない課題に直面しました。

C2 adjective /ɪnˈfɜːrnəl/

infernal

地獄の

Meaning

relating to hell; extremely troublesome or annoying

Example

The workers complained about the infernal noise from the construction site.

労働者たちは建設現場からの地獄のような騒音について文句を言った。

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 noun /ɪˈnɪkwɪti/

iniquity

不正

Meaning

Immoral or grossly unfair behavior.

Example

The dictator's regime was marked by corruption and iniquity.

独裁者の政権は腐敗と不正で特徴づけられていました。

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 /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。

C2 adjective /ˌɪn.trəˈsɛl.jʊ.lər/

intracellular

細胞内

Meaning

Located or occurring within a cell.

Example

The drug works by targeting intracellular bacteria.

薬は細胞内の細菌をターゲットにして作用します。

C2 adjective /ˌɪnsəˈprɛsəbl/

insuppressible

抑制できない

Meaning

That cannot be suppressed or restrained.

Example

She had an insuppressible urge to laugh during the ceremony.

式の間、彼女は抑制できない笑いをこらえていた。

C2 adjective /ɪnˈklɛmɛnt/

inclement

悪天候

Meaning

unpleasantly cold, wet, or stormy (usually weather)

Example

The match was canceled due to inclement weather.

試合は悪天候のためキャンセルされました。

C2 adjective ɪˈnɛfəbl

ineffable

言葉で表現できない

Meaning

Too great or extreme to be expressed or described in words.

Example

The beauty of the landscape was ineffable.

その景色の美しさは言葉で表現できなかった。

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。

C2 noun /ˈɪntərˌveɪl/

intervale

川沿いの低地、通常は肥沃で平坦

Meaning

A low-lying tract of land along a river, usually fertile and flat.

Example

The farmers cultivated crops on the lush intervale by the river.

農民たちは川沿いの肥沃な土地で作物を育てた。

C2 noun /ˌɪmprɪˈkeɪʃən/

imprecation

呪い

Meaning

A spoken curse or expression of strong condemnation.

Example

The angry crowd hurled imprecations at the corrupt official.

怒った群衆は腐敗した役人に呪いを投げかけた。

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。

C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

アイデア創出

Meaning

The process of forming and developing new ideas or concepts through creative thinking and brainstorming.

Example

The team engaged in ideation sessions to generate new product ideas.

チームは新製品のアイデアを生み出すためにアイデーションセッションに取り組んだ。

C2 noun /ˈaɪdɪl/

idyll

田園詩的なシーン

Meaning

An extremely happy, peaceful, or picturesque episode or scene, often idealized.

Example

Their honeymoon was an idyll on a tropical island.

彼らのハネムーンは熱帯の島での田園詩的なシーンでした。

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 /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。

C2 verb /ɪˈniː.bri.eɪt/

inebriate

Meaning

to intoxicate; to make someone drunk

Example

The strong wine was enough to inebriate even the most experienced drinker.

C2 noun /ˈɪnfəmi/

infamy

幸福

Meaning

the state of being well known for some bad quality or deed

Example

His name will live in infamy for the crimes he committed.

彼女は賞を受け取ったとき、自分の幸福を隠すことができなかった。

C2 adjective /ˌɪndɪˈsɜːrnəbl/

indiscernible

見分けがつかない

Meaning

Impossible or difficult to see, notice, or distinguish.

Example

The difference between the two shades was almost indiscernible.

二つの色調の違いはほとんど見分けがつかなかった。

C2 noun /ˈɪd.i.ə.si/

Idiocy

愚かさ

Meaning

extremely stupid behavior or actions; foolishness

Example

The decision to ignore safety protocols was pure idiocy that endangered everyone.

安全プロトコルを無視する決定は、すべての人を危険にさらす純粋な愚かさでした。

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。

C2 noun /ɪˈrɛvərəns/

irreverence

不敬

Meaning

a lack of respect for people or things that are generally taken seriously

Example

His jokes about religion showed irreverence to the sacred traditions.

宗教についての彼の冗談は、神聖な伝統に対する不敬を示していました。

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。

C2 verb /ɪmˈbruː/

imbrue

汚す

Meaning

To stain, especially with blood.

Example

His hands were imbrued with blood after the battle.

戦いの後、彼の手は血で汚れていた。

C2 noun /ɪnˈhɪərəns/

inherence

内在性

Meaning

The state of being an essential or permanent part of something.

Example

The inherence of risk is part of every business venture.

リスクの内在性はすべてのビジネス冒険の一部です。

C2 verb /ˈɪmprɪkeɪt/

imprecate

呪う

Meaning

To utter a curse or invoke evil upon someone.

Example

The old woman imprecated her enemies with dark words.

その年老いた女性は暗い言葉で敵を呪いました。