invocation
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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 /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 noun /ˌɪmbəˈsɪləti/

imbecility

愚かさ
Meaning
Extreme foolishness, stupidity, or weakness of mind.
Example
The plan was abandoned due to its sheer imbecility.
その計画はその愚かさから放棄されました。
C2 noun /ɪnˈvaɪtər/

invitor

招待者
Meaning
a person who invites someone to an event, meeting, or place
Example
The invitor greeted all the guests warmly at the entrance.
招待者は入口で客を温かく迎えた。
C2 adjective /ˌɪndɪˈvɜːrtɪbəl/

indivertible

Meaning
Not able to be turned aside or diverted.
Example
The judge's indivertible attention was on the case.
C2 noun /ˌɪn.təˈvɛn.ʃə.nɪ.zəm/

interventionism

介入主義
Meaning
Government policy of active involvement in economic affairs.
Example
The central bank's interventionism helped stabilize inflation.
中央銀行の介入主義はインフレの安定に役立った。
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 /ˈɪl bred/

Ill-bred

無作法な
Meaning
lacking good manners; rude; showing poor upbringing
Example
His ill-bred behavior shocked everyone at the dinner party.
彼の無作法な振る舞いは、ディナー・パーティーで皆を驚かせた。
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 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 noun /ˌɪnkænˈteɪʃən/

incantation

呪文
Meaning
a series of words used as a magic spell or charm
Example
The wizard chanted an incantation to summon the spirits.
魔法使いは霊を呼び出すために呪文を唱えました。
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 noun /ˈaɪ.kɒn/

ikon

宗教的な画像やシンボル
Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
教会は美しく描かれた聖母マリアのアイコンを展示しました。
C2 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 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。
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 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

不確実性
Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
ロトで二回連続で当選する可能性の低さは、彼女がチケットを買うのを止めませんでした。
C2 verb /ˈɪŋkʌlpeɪt/

inculpate

非難する
Meaning
To blame or accuse someone of wrongdoing.
Example
The evidence seemed to inculpate the suspect in the crime.
証拠は容疑者を犯行に巻き込んでいるように見えた。
C2 noun /ˌɪməʊˈbɪləti/

immobility

不動
Meaning
The state of being unable to move.
Example
After the accident, she suffered from immobility in her legs.
事故の後、彼女は足の不動に苦しみました。
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 verb /ɪmˈpɛnd/

impend

迫る
Meaning
to be about to happen; to loom threateningly
Example
Dark clouds suggested that a storm was impeding.
暗い雲が嵐が迫っていることを示唆していた。
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 verb /ɪnˈfætʃueɪt/

infatuate

夢中にさせる
Meaning
to inspire with an intense but short-lived passion or admiration
Example
He was infatuated with her beauty.
彼は彼女の美しさに夢中でした。
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 adjective /ˌɪntəˈrɒɡətəri/

interrogatory

尋問的な
Meaning
expressed in the form of a question; relating to questioning
Example
The lawyer’s interrogatory tone made the witness uncomfortable.
弁護士の尋問的な口調は証人を不快にさせました。
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 /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 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 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 noun /ˌɪmprəˈsɑːrioʊ/

impresario

プロデューサー
Meaning
A person who organizes or finances concerts, plays, or operas.
Example
The impresario arranged a series of concerts for the rising star.
インプレサリオは、急成長するスターのためにコンサートのシリーズを手配しました。
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 /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 adjective /ˈɪnˌbrɛd/

inbred

生まれつき
Meaning
existing naturally in a person or animal; also related to reproduction within a limited community
Example
He has an inbred sense of loyalty.
彼には生まれつきの忠誠心があります。
C2 noun /ˈɪnroʊd/

inroad

進展
Meaning
An advance or significant progress, often at the expense of something else.
Example
The company made significant inroads into the mobile market.
その会社はモバイル市場で重要な進展を遂げました。
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 verb /ɪnˈɡreɪʃiˌeɪt/

ingratiate

Meaning
To gain favor or approval by deliberate effort, often in a flattering way.
Example
She tried to ingratiate herself with her boss by complimenting him often.
C2 noun /ˈɪntərˌloʊpər/

interloper

干渉者
Meaning
A person who becomes involved in a situation or place where they are not wanted.
Example
He felt like an interloper at the private family gathering.
彼はプライベートな家族の集まりで干渉者のように感じた。
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 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 noun /ɪˈrʌp.ʃən/

Irruption

突然の暴力的な侵入; 侵略または襲撃; 突然の噴出または噴火
Meaning
a sudden violent entry; an invasion or raid; a sudden outburst or eruption
Example
The army's irruption into enemy territory caught the opposing forces completely off guard.
軍隊の敵領土へのイラプションは、相手の力を完全に不意を突いた。
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 /ɪmˈprɑːvɪdəns/

improvidence

不注意
Meaning
Lack of foresight or care for future needs.
Example
His improvidence led to financial difficulties.
彼の不注意が彼を財政的な困難に追い込んだ。
C2 adjective /ɪnˈvʌlnərəbl/

invulnerable

無敵
Meaning
Impossible to harm, damage, or defeat.
Example
The fortress was thought to be invulnerable to attack.
その要塞は攻撃に対して無敵だと考えられていた。
C2 verb /ɪnˈdɒktrɪˌneɪt/

indoctrinate

教義を押し付ける
Meaning
To teach someone to fully accept a set of beliefs or ideas without question.
Example
The regime tried to indoctrinate the youth with propaganda.
その政権は宣伝を通じて若者を洗脳しようとした。
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 /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 noun /ɪˌluːmɪˈnɑːti/

illuminati

イルミナティ
Meaning
a group of people claiming to have special enlightenment or secret knowledge, often linked to conspiracies
Example
Many conspiracy theories involve the Illuminati as a secret world-controlling group.
多くの陰謀論はイルミナティを世界を支配する秘密のグループとして扱っている。
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 /ˌaɪsəʊˈθɜːrməl/

isothermal

等温
Meaning
Having or maintaining equal or constant temperature.
Example
The experiment was conducted under isothermal conditions.
実験は等温条件で行われました。
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。
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 /ɪˈluːmɪnənt/

illuminant

光源
Meaning
A substance or device that produces light.
Example
The lamp acted as an illuminant in the dark cave.
ランプは暗い洞窟で光源として機能しました。
C2 adjective /ɪˈmɪsəbl/

immiscible

不混和
Meaning
Describes liquids that do not mix together.
Example
Oil and water are immiscible liquids.
油と水は不混和の液体です。
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 noun /ˈɪɡ.nəˌmɪn.i/

ignominy

恥辱
Meaning
Public shame, disgrace, or dishonor.
Example
He lived the rest of his life in ignominy after the scandal.
スキャンダル後、彼は生涯を恥辱の中で過ごした。
C2 adjective /ˌɪndɪˈfætɪɡəbl̩/

indefatigable

疲れ知らず
Meaning
persisting tirelessly; incapable of being fatigued
Example
Her indefatigable spirit kept the team motivated during the long project.
彼女の疲れ知らずの精神が、長いプロジェクトを通してチームを励ましました。
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 noun /ˌɪnkəˈpæsəti/

incapacity

無能力
Meaning
the lack of ability, power, or fitness to do something
Example
His mental incapacity prevented him from making important decisions.
彼の精神的無能力は、重要な決定を下すのを妨げました。
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 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

イクチオサウルス（絶滅した海の爬虫類）
Meaning
Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.
Example
Ichthyosaurs were swift predators of the ancient seas.
イクチオサウルスは古代の海で素早い捕食者でした。
C2 adjective /ˈɪnmoʊst/

inmost

最も内面の
Meaning
Situated at the very heart or deepest part; most private or secret.
Example
She revealed her inmost thoughts to her closest friend.
彼女は最も内面的な考えを最も親しい友達に明かした。
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。
C2 adjective ˌɪn.ɪ.fɪˈkeɪ.ʃəs

inefficacious

効果がない
Meaning
Not producing any or the desired effect; ineffective.
Example
The treatment was inefficacious in curing the disease.
その治療法は病気の治癒に効果がありませんでした。
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 noun /ɪmˈpruː.dəns/

Imprudence

無分別; 不注意; 軽率
Meaning
the quality of being imprudent; lack of care for consequences; recklessness
Example
His financial imprudence led to bankruptcy within just two years.
彼の財務の無分別は、わずか2年で破産を招いた。
C2 adjective /ɪˈlɪmɪtəbl/

illimitable

無限
Meaning
Without limits or bounds.
Example
The universe is often described as illimitable.
宇宙はしばしば無限であると説明されます。
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 adjective /aɪˈdɒlətrəs/

idolatrous

偶像崇拝者
Meaning
Excessively admiring or worshipping someone or something as an idol.
Example
The king was criticized for his idolatrous devotion to wealth.
王は富に対する偶像崇拝的な献身で批判されました。
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 noun /aɪər/

ire

怒り, 激怒
Meaning
intense anger or rage
Example
The new policy provoked the ire of the employees.
新しい政策は従業員の怒りを引き起こした。
C2 verb /ˈɪntərˌdɪkt/

interdict

禁じる
Meaning
to prohibit or forbid something by authoritative order, often by law or decree
Example
The court moved to interdict the sale of the illegal goods.
裁判所は違法な商品の販売を禁じることを決定しました。
C2 adjective /ˌɪmpəˈmɪsəbl/

impermissible

許可されていない
Meaning
Not permitted or allowed.
Example
Such behavior is impermissible in the workplace.
そのような行動は職場では許可されていません。
C2 adverb /ɪnˈdjuːbɪtəbli/

indubitably

疑いなく
Meaning
Without a doubt; certainly.
Example
She is indubitably the best candidate for the job.
彼女は疑いなくその仕事の最良の候補者です。
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 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 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 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 /ˌɪmprɪˈmɑːtər/

imprimatur

承認
Meaning
An official license or approval, especially to publish a book.
Example
The book was released with the official imprimatur of the church.
その本は教会の正式な承認を得て出版されました。
C2 noun /ˌɪmpəˈtjuːəsəti/

impetuosity

衝動性
Meaning
The quality of being rash or impulsive.
Example
His impetuosity often got him into trouble.
彼の衝動性はしばしば彼を問題に巻き込んだ。
C2 adjective /ˌaɪ.kə.nəˈklæs.tɪk/

iconoclastic

確立された信念、伝統、または価値観に対して攻撃的または拒絶的な特徴
Meaning
Characterized by attacking or rejecting cherished beliefs, traditions, or established values.
Example
Her iconoclastic views challenged the conventional wisdom of the industry.
彼女のアイコノクラスティックな見解は業界の従来の知恵に挑戦した。
C2 adjective /ˌɪlˈneɪ.tʃəd/

ill-natured

性格が悪い
Meaning
Having a bad or unpleasant character; unkind or malicious.
Example
He made an ill-natured remark about his colleague.
彼は同僚について悪意のある発言をしました。
C2 adjective /ɪnˈɛksərəbl/

inexorable

避けられない
Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
テクノロジーの避けられない上昇は、生活のすべての側面を変えています。
C2 noun /ɪˌledʒ.əˈbɪl.ə.ti/

Illegibility

読みにくさ
Meaning
the quality of being impossible or difficult to read; unclear writing or print
Example
The doctor's handwriting was famous for its illegibility among the pharmacy staff.
医者の手書きは薬局のスタッフの間でその読みにくさで有名でした。
C2 adjective /ˌɪnɪkˈsprɛsəbl/

inexpressible

言葉では表現できない
Meaning
Too strong or extreme to be expressed in words.
Example
She felt inexpressible joy at the news of her success.
彼女は成功の知らせを聞いて言葉では表現できない喜びを感じた。
C2 noun /ɪmˌpɜːrtərbəˈbɪləti/

imperturbability

不動心
Meaning
The quality of being calm and not easily disturbed or upset.
Example
Her imperturbability during the crisis impressed everyone.
危機の際に彼女の不動心は皆に印象を与えました。
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 noun /ˌɪnəməˈrɑːtə/

inamorata

Meaning
A woman with whom someone is in love; a female lover.
Example
He wrote a poem dedicated to his inamorata.
C2 noun (compound/erroneous entry) /ɪnˈɛksərəbl ɑːrmi/

inexorableinexorablearmy

止められない軍隊
Meaning
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
Example
The rebels feared the inexorable army approaching their stronghold.
反乱軍は自分たちの砦に近づいてくる止められない軍隊を恐れていた。
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 /ˌɪndɛnˈteɪʃən/

indentation

インデント
Meaning
A space left at the beginning of a line of text; a notch or deep recess on a surface.
Example
The teacher asked the students to use proper indentation in their essays.
先生は学生にエッセイで適切なインデントを使用するように頼みました。
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 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 verb /ɪˈluːmɪn/

illumine

照らす
Meaning
to light up or make clear
Example
The rising sun illumined the mountain peaks.
昇る太陽が山頂を照らした。
C2 verb /ˌɪn.trəˈmɪt/

intromit

挿入する
Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
医者は慎重に器具を傷口に挿入しました。
C2 adjective /ˈɪnfəntaɪl/

infantile

幼稚な
Meaning
characteristic of an infant; childish
Example
His infantile behavior embarrassed everyone at the meeting.
彼の幼稚な行動は会議でみんなを困らせた。
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 /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 /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。
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 noun /ˌɪnsjəˈlærəti/

insularity

島国性
Meaning
The state of being isolated or narrow-minded.
Example
The insularity of the group prevented them from accepting new ideas.
グループの島国性は新しいアイデアを受け入れることを妨げた。
C2 adjective /aɪˈtɪnərənt/

itinerant

旅する
Meaning
Traveling from place to place, especially for work or duty.
Example
The itinerant teacher moved from village to village to educate children.
その旅する教師は村から村へと移動して子供たちに教育をしていました。
C2 adjective /ɪnˈtɛsteɪt/

intestate

遺言なしで死亡
Meaning
Having died without leaving a valid will.
Example
She died intestate, so her assets were distributed by law.
彼女は遺言なしで死亡したため、財産は法に従って分配されました。
C2 noun /ˌɪnkənˈɡruːəti/

incongruity

不一致
Meaning
The state of being inconsistent or out of place.
Example
The incongruity of his cheerful mood during the funeral shocked everyone.
葬式の最中に彼の陽気な気分の不一致は、皆を驚かせました。
C2 adjective /ɪnˈkɒntɪnənt/

incontinent

失禁
Meaning
lacking control over urination or defecation; lacking self-restraint
Example
The patient was incontinent after surgery.
手術後、患者は失禁していた。
C2 verb /ˌɪntərˈmɪt/

intermit

中断する
Meaning
To suspend or stop for a time; to pause intermittently.
Example
The rain would intermit and then start again.
雨は中断し、再び始まる。
C2 adjective /ɪmˈpɪəriəs/

imperious

横柄な
Meaning
Arrogantly domineering or overbearing.
Example
Her imperious tone made it hard for others to argue.
彼女の横柄な口調は他の人々が議論するのを難しくしました。
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 /ˌɪm.pəˈfɛk.tə.bəl/

imperfectible

インパーフェクティブル
Meaning
Incapable of being made perfect or complete.
Example
Some human qualities are considered imperfectible.
いくつかの人間の資質は、完璧にはならないと見なされます。
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 /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 /aɪˈoʊtə/

iota

微小な量
Meaning
An extremely small amount.
Example
He did not show an iota of fear.
彼は恐怖の一片も見せませんでした。
C2 noun /ɪnˈtɛnʃən/

intension

内的意味
Meaning
The internal content of a concept; the set of attributes implied by a word or phrase.
Example
The intension of the word 'dog' includes being a mammal and domesticated.
'犬'という言葉のインテンションには哺乳類であり、飼いならされたことが含まれます。
C2 adjective /ɪnˈkɒrɪdʒəbəl/

incorrigible

訂正不可能な
Meaning
incapable of being corrected, improved, or reformed
Example
He is an incorrigible optimist who never loses hope.
彼は決して希望を失わない訂正不可能な楽観主義者です。
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 noun /ˌɪnjuːˈɛndəʊ/

innuendo

暗示
Meaning
An allusive or oblique remark or hint, typically a suggestive or disparaging one.
Example
The manager's innuendo was directed towards his competitor.
マネージャーの暗示は競争相手に向けられていました。
C2 adverb /ˌɪnəzˈmʌtʃ/

inasmuch

〜という点で
Meaning
To the extent that; considering that.
Example
Inasmuch as you are their teacher, you should guide them carefully.
あなたが彼らの教師である限り、彼らを慎重に指導するべきです。
C2 noun /ɪˈreɪdiəns/

irradiance

放射輝度
Meaning
the quality of shining brightly; the intensity of light falling on a surface
Example
The irradiance of the sun at noon was overwhelming.
正午の太陽の放射輝度は圧倒的でした。
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 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。
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。