inducement
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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 /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。
B2 adjective /ɪnˈædɪkwət/

inadequate

不十分
Meaning
Not sufficient or good enough.
Example
The funding was inadequate to complete the project.
プロジェクトを完成させるには資金が不十分でした。
C1 adjective /ˈɪndɪɡoʊ bluː/

Indigo-blue

インディゴブルー
Meaning
a deep blue color with a purplish tinge
Example
The indigo-blue sky looked magnificent at twilight.
インディゴブルーの空は夕暮れ時に壮大に見えた。
B1 noun /ˈɪnpʊt/

input

入力、提供された情報
Meaning
information, advice, or data that is put into a system, device, or process
Example
The manager asked for everyone's input on the new project.
マネージャーは新しいプロジェクトに対する全員のインプットを求めました。
B2 adjective ɪˈmɜː.sɪv

immersive

没入型
Meaning
Providing, involving, or characterized by deep absorption or immersion in something.
Example
Virtual reality creates an immersive learning environment.
仮想現実は没入型の学習環境を作り出します。
C1 verb /ɪɡˈnaɪt/

ignite

点火する
Meaning
To catch fire or cause to catch fire; to start or arouse.
Example
The sparks ignited the dry leaves in seconds.
火花が数秒で乾燥した葉に火をつけた。
B2 noun /ɪnˈkwaɪəri/ or /ˈɪnkwəri/

inquiry

調査 / 問い合わせ
Meaning
An act of asking for information; an investigation into something.
Example
The committee launched an inquiry into the financial irregularities.
委員会は財務の不正行為に関する調査を開始しました。
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 noun /ɪnˈfɜːrnoʊ/

inferno

火災
Meaning
a large, intense fire that is dangerously out of control
Example
The building turned into an inferno within minutes.
その建物は数分で火災に変わった。
C2 adjective /ɪnˈsɪpɪd/

insipid

味気ない
Meaning
lacking flavor, interest, or excitement; dull
Example
The soup was insipid and needed more seasoning.
スープは味気なく、もっと調味料が必要でした。
C2 noun /ˈɪl.i.æd/

iliad

イリアス
Meaning
An ancient Greek epic poem attributed to Homer, describing the events of the Trojan War.
Example
Students studied the Iliad to understand Greek mythology and heroism.
学生たちはイリアスを学び、ギリシャ神話と英雄主義を理解しました。
C1 noun /ˌɪnˈdɪsəplɪn/

indiscipline

規律の欠如
Meaning
lack of discipline or self-control; failure to obey rules or maintain order
Example
Indiscipline among the students disrupted the learning environment.
学生の規律の欠如が学習環境を乱した。
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。
C2 adjective /ɪmˈplækəbl/

implacable

容赦しない
Meaning
unable to be appeased, calmed, or pacified
Example
The soldiers faced an implacable enemy who refused to surrender.
兵士たちは降伏を拒否した容赦しない敵に直面した。
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。
B2 noun /ɪsˈlɑːm/

islam

イスラム教
Meaning
the religion founded by the Prophet Muhammad, based on belief in one God (Allah)
Example
Islam emphasizes peace, justice, and compassion.
イスラム教は平和、正義、そして慈悲を強調します。
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.
C1 noun /ˈɪtʃ.i.nəs/

itchiness

かゆみ
Meaning
The quality or condition of feeling an irritating sensation on the skin that causes a desire to scratch.
Example
Eye itchiness often leads to rubbing.
目のかゆみはしばしば擦る原因となります。
C1 noun/verb /ˈɪnsɛns/

incense

お香 / 激怒させる
Meaning
a substance burned for its sweet smell (noun); to make very angry (verb)
Example
The smell of incense filled the temple, but his rude words incensed her.
お香の香りが寺院を満たしましたが、彼の失礼な言葉は彼女を激怒させました。
B1 noun/adjective /ˈɪnstənt/

instant

瞬間
Meaning
A very short period of time; happening immediately.
Example
He replied in an instant without hesitation.
彼は躊躇うことなく瞬時に返答した。
C2 noun /ˈɪn.fɪ.del/

Infidel

異教徒
Meaning
a person who does not believe in religion or whose religious beliefs differ from one's own
Example
In historical contexts, crusaders often referred to their enemies as infidels.
歴史的な文脈では、十字軍はしばしば自分たちの敵を異教徒と呼んでいました。
C1 noun /ˌɪntərˌɒpərəˈbɪləti/

interoperability

相互運用性
Meaning
The ability of computer systems or software to exchange and make use of information.
Example
The interoperability of different software systems ensures seamless workflow.
異なるソフトウェアシステムの相互運用性は、シームレスな作業の流れを確保します。
A2 adjective/noun /ˈaɪrɪʃ/

irish

幸福
Meaning
relating to Ireland, its people, or its language
Example
The Irish countryside is very beautiful.
彼女は賞を受け取ったとき、幸せを隠すことができませんでした。
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。
B2 adjective /ˈaɪ.dəl/

Idle

怠惰な; 非活動的な; 使われていない
Meaning
lazy; inactive; not working or being used
Example
The factory workers were idle during the strike.
工場の労働者はストライキ中に暇だった。
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。
B2 noun ˈɪnər strɛŋkθ

inner strength

内面の強さ
Meaning
Mental or spiritual power that helps a person cope with difficulties.
Example
Community service fosters inner strength in individuals.
コミュニティサービスは個人に内面的な強さを育む。
A2 noun /ˈɪntəvjuː/

interview

面接
Meaning
A meeting of people face to face, especially for consultation.
Example
The interview was conducted in a calm and professional manner.
面接は落ち着いたプロフェッショナルな方法で行われました。
C2 noun /ˌɪdiəˈsɪŋkrəsi/

idiosyncrasy

特異性
Meaning
A distinctive or peculiar characteristic, habit, or mannerism unique to an individual.
Example
One of her idiosyncrasies was humming while working.
彼女の一つの特異性は、仕事中に口ずさむことでした。
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。
C1 noun ɪˌræʃ.ənˈæl.ɪ.ti

irrationality

非合理性, 非論理性, 不合理
Meaning
The quality of being illogical or unreasonable; lack of rational thought.
Example
His decision was driven by complete irrationality.
彼の決定は完全に非合理的でした。
B2 noun ɪnˌdʌstrɪəlaɪˈzeɪʃən

industrialization

産業化
Meaning
The development of industries in a country or region on a wide scale.
Example
Industrialization changed the global economy dramatically.
産業化は世界経済を劇的に変えました。
C1 verb /ɪnˈfjʊərieɪt/

infuriate

激怒させる
Meaning
To make someone extremely angry.
Example
His careless remarks infuriated the entire team.
彼の不注意な発言がチーム全体を怒らせた。
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。
C1 noun /ˌɪntərˈdʒɛkʃən/

interjection

感嘆詞
Meaning
a word or phrase used to express sudden emotion or reaction, often standing alone
Example
Words like 'wow' and 'ouch' are common interjections in English.
'わお'や'痛っ'は英語でよく使われる感嘆詞です。
B1 adjective /ɪˈliː.ɡəl/

illegal

違法
Meaning
Not allowed by law; unlawful.
Example
It is illegal to drive without a valid license.
有効な免許なしで運転することは違法です。
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 adjective /ˈɪnfəməs/

infamous

悪名高い
Meaning
well known for some bad quality or deed
Example
The dictator was infamous for his cruelty.
その独裁者はその残虐さで悪名高かった。
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 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 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。
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。
B2 adverb /aɪˈrɒnɪkli/

ironically

皮肉にも
Meaning
in a way that is contrary to what is expected or intended
Example
Ironically, the fire station burned down.
皮肉にも、消防署が焼け落ちた。
B2 adjective /ˌɪnəˈproʊpriət/

inappropriate

不適切
Meaning
not suitable or proper in the circumstances
Example
It was inappropriate to talk loudly in the library.
図書館で大声で話すのは不適切でした。
C1 adjective, noun /ˈɪnvəlɪd/ (adjective), /ɪnˈvælɪd/ (noun)

invalid

無効
Meaning
Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.
Example
The court declared the contract invalid.
裁判所は契約を無効と宣言した。
B2 adjective /ɪmˈplɪsɪt/

implicit

暗黙の
Meaning
Suggested or understood without being directly stated.
Example
Her trust in him was implicit.
彼女の彼に対する信頼は暗黙のものでした。
B2 adjective ˌɪnɪˈfɛktɪv

ineffective

効果がない
Meaning
Not producing any significant or desired effect; not achieving the intended result.
Example
Rote learning often proves to be ineffective.
暗記学習はしばしば効果がないことが証明されます。
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。
C2 adjective /ɪmˈpɒndərəbl̩/

imponderable

計り知れない
Meaning
Something difficult or impossible to estimate, assess, or understand
Example
The outcome of the election depends on many imponderable factors.
選挙の結果は、多くの計り知れない要因に依存しています。
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。
A1 preposition /ˈɪntuː/

into

中へ
Meaning
expressing movement or direction to the inside of something
Example
She walked into the room quietly.
彼女は静かに部屋に入った。
B2 verb /ɪnˈkwaɪər/

inquire

尋ねる
Meaning
to ask; to investigate
Example
She inquired about the job opening.
彼女は仕事の募集について尋ねました。
B2 adjective /ɪmˈpɜːrfɪkt/

imperfect

不完全
Meaning
Not perfect; having faults or flaws.
Example
The painting was beautiful despite being imperfect.
その絵は美しかったが、完璧ではなかった。
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。
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 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.
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。
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。
B2 verb /ɪˈnɪʃieɪt/

initiate

開始する
Meaning
to begin or start; to introduce someone to a new activity
Example
The company will initiate a new training program.
会社は新しい研修プログラムを開始します。
B2 noun /ˌɪmɪˈɡreɪʃən/

immigration

移民
Meaning
the action of coming to live permanently in a foreign country
Example
Immigration policies vary from country to country.
移民政策は国によって異なります。
B2 adjective, noun /ˌɪn.təlˈɛk.tʃu.əl/

intellectual

知的な
Meaning
Relating to the intellect; a person who engages in critical thinking and study.
Example
She enjoys intellectual discussions about philosophy.
彼女は哲学についての知的な議論を楽しんでいます。
C2 noun /ˈɪn.dɪ.dʒəns/

indigence

貧困
Meaning
a state of extreme poverty or destitution
Example
The charity was founded to help people living in indigence.
その慈善団体は貧困の中で生活している人々を助けるために設立されました。
C1 adjective /ɪnˈfriːkwənt/

infrequent

稀な
Meaning
Happening rarely or not often.
Example
He made infrequent visits to his hometown after moving abroad.
彼は海外に移住した後、故郷にあまり頻繁に訪れることはありませんでした。
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 verb /ɪnˈfjuːz/

infuse

Meaning
to fill or spread through something; to instill a quality, idea, or feeling
Example
The teacher tried to infuse her students with a love for reading.
C2 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 adjective /ɪˈmɒdɪst/

immodest

傲慢 / 不適切
Meaning
lacking humility or decency; excessively proud or improper
Example
His immodest remarks offended the audience.
彼の傲慢な発言は観客を不快にさせた。
B2 verb /ˈɪmɪɡreɪt/

immigrate

移住する
Meaning
to come to live permanently in a foreign country
Example
He immigrated to Canada five years ago.
彼は5年前にカナダに移住しました。
C1 verb /ɪnˈvælɪdeɪt/

invalidate

無効にする
Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
新しい証拠が前の判決を無効にするかもしれません。
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。
B2 adjective /ɪnˈfɔːrmətɪv/

Informative

有益な
Meaning
giving or providing useful information; educational; instructive
Example
The documentary was very informative and educational.
そのドキュメンタリーはとても有益で教育的でした。
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。
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。
B2 adjective /ɪˈmɒrəl/

immoral

不道徳な
Meaning
Not conforming to accepted standards of morality; unethical or wicked.
Example
He was fired for his immoral behavior.
彼は不道徳な行動で解雇されました。
B2 noun /ɪnˈtɛnsəti/

intensity

強度
Meaning
The quality of being extreme, strong, or forceful in degree.
Example
The intensity of the storm frightened the villagers.
嵐の強度は村人たちを驚かせた。
B2 noun /ɪnˈdʌstriəl ˌrɛvəˈluːʃən/

Industrial Revolution

産業革命
Meaning
The rapid development of industry that occurred in Britain in the late 18th and 19th centuries, brought about by the introduction of machinery and characterized by the use of steam power and the growth of factories.
Example
The Industrial Revolution marked a shift in production processes.
産業革命は生産プロセスにおける変化を示しました。
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 /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。
C1 verb /ɪnˈhɪbɪt/

inhibit

抑制する
Meaning
to prevent or restrain someone or something from acting freely; to hinder
Example
Fear can inhibit personal growth.
恐怖は個人の成長を抑制する可能性があります。
A2 verb /ɪnˈkri:s/

increase

増加
Meaning
to become or make something larger in amount, number, or degree
Example
The company plans to increase its production this year.
その会社は今年、生産を増加させる予定です。
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。
C2 adjective /ˌɪrɪˈfrændʒɪbəl/

irrefrangible

侵害できない
Meaning
Not to be broken, violated, or infringed
Example
The constitution guarantees certain irrefrangible rights to every citizen.
憲法はすべての市民にいくつかの侵害できない権利を保証します。
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。
C2 adjective /ɪmˈpælpəbəl/

impalpable

触れない
Meaning
unable to be felt by touch; difficult to grasp or understand
Example
There was an impalpable sense of fear in the room.
部屋には触れない恐怖感があった。
C1 noun /ˈɪnsɪdəns/

incidence

発生率
Meaning
the occurrence, rate, or frequency of something
Example
The incidence of road accidents has decreased this year.
今年の道路事故の発生率は減少しました。
C1 adjective /ˈɪnsələnt/

insolent

無礼な、傲慢な
Meaning
showing a rude and arrogant lack of respect
Example
The insolent student refused to follow the teacher's instructions.
その無礼な学生は教師の指示に従うことを拒否した。
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 adjective /ɪˈledʒ.ə.bəl/

illegible

読めない
Meaning
Not clear enough to be read; unreadable.
Example
The doctor’s handwriting was almost illegible.
医者の手書きはほとんど読めなかった。
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。
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。
C1 adjective /ˈaɪərnˌklæd/

ironclad

鉄壁の
Meaning
impossible to change, break, or dispute; very strong and firm
Example
The company had an ironclad contract with its suppliers.
その会社はサプライヤーと鉄壁の契約を結んでいた。
C1 verb /ˌɪn.trəˈspekt/

introspect

内省する
Meaning
To examine one's own thoughts, feelings, or mental state.
Example
He often introspects before making important decisions.
彼は重要な決定を下す前にしばしば自己分析をします。
B2 noun /ɪnˈtɪəriər/

interior

インテリア
Meaning
the inside part of something; inner area of a place or object
Example
The interior of the hotel was beautifully decorated.
ホテルのインテリアは美しく装飾されていました。
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。
C2 noun /ˌɪntərˈsɛʃən/

intercession

仲介
Meaning
the act of intervening or pleading on behalf of another person
Example
The prisoner was released due to the intercession of influential leaders.
囚人は影響力のあるリーダーたちの仲介で釈放されました。
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 noun /ˈɪmɪnəns/

imminence

差し迫り、間近な状態
Meaning
the state of being about to happen
Example
The imminence of the storm forced people to take shelter.
嵐の差し迫りが人々を避難させることを強制した。
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。
B1 noun /ˈɪn.flu.əns/

Influence

影響; 力
Meaning
the capacity to have an effect on the character, development, or behavior of someone or something
Example
The teacher's positive influence helped the student overcome his learning difficulties.
教師の積極的な影響が生徒の学習の問題を克服する手助けをしました。
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。
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 adjective /aɪˈsɒ.krə.nəs/

isochronous

等時間間隔で発生する
Meaning
Occurring at equal time intervals; in unison or synchrony.
Example
The pendulum swings are isochronous, repeating at equal intervals.
振り子の動きは等時性があり、等しい間隔で繰り返されます。
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。
B2 verb /ɪmˈpoʊzd/

imposed

課す
Meaning
forced something to be accepted or put in place
Example
The government imposed new regulations on the industry.
政府は産業に新しい規制を課した。
B2 noun /ˌɪnəˈbɪləti/

inability

無能
Meaning
the state of being unable to do something
Example
His inability to make decisions affected his career.
彼の意思決定の無能さは彼のキャリアに影響を与えた。
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。
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。
B2 noun ɪnˈsɛntɪvz

incentives

インセンティブ
Meaning
Things that motivate or encourage one to do something.
Example
Tax incentives are used to encourage investment in renewable energy.
税制上のインセンティブは再生可能エネルギーへの投資を促進するために使用されます。
C1 adjective /ɪnˈdefɪnət/

Indefinite

不確定な
Meaning
not clearly defined; uncertain; vague; unlimited in time
Example
The meeting has been postponed for an indefinite period.
会議は不確定な期間に延期されました。
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 adjective /ˌɪn.səˈbɔːr.dɪ.nət/

insubordinate

命令不服従
Meaning
Defiant of authority; disobedient to orders.
Example
The insubordinate employee refused to follow the manager's instructions.
命令不服従の従業員は、マネージャーの指示に従うことを拒否した。
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 /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。
B2 verb /ˈɪl.ə.streɪt/

illustrate

説明する
Meaning
to explain or make something clear by using examples, pictures, or comparisons
Example
The teacher used diagrams to illustrate the concept.
先生はその概念を説明するために図を使いました。
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 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。
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.
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。
B2 adjective /ɪnˈkeɪpəbəl/

incapable

無能力な
Meaning
lacking the ability, skill, or capacity to do something
Example
He is incapable of understanding complex instructions.
彼は複雑な指示を理解できない。
C2 noun /ɪˈnænɪti/

inanity

馬鹿げたこと, 空虚
Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
スピーチは聴衆を退屈させる馬鹿げたことだらけだった。