inconvenience
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B2 noun, verb /ˌɪnkənˈviːniəns/

inconvenience

不便
Meaning
trouble or difficulty caused to someone; to cause trouble or difficulty to someone
Example
We apologize for any inconvenience caused by the delay.
遅延によって生じた不便についてお詫びします。
B2 verb /ɪnˈfɛkt/

infect

感染させる
Meaning
To contaminate with a disease-causing organism.
Example
The virus can infect healthy people quickly.
ウイルスは健康な人々を迅速に感染させることができます。
B2 noun /ɪnˌtɜːrprəˈteɪʃən/

interpretation

解釈
Meaning
the action of explaining the meaning of something
Example
The teacher gave her own interpretation of the poem.
教師は詩の自分の解釈を示しました。
B2 noun /ɪmˈpeɪʃəns/

impatience

忍耐力不足
Meaning
The state of being quickly irritated or unable to wait calmly.
Example
His impatience grew as the meeting dragged on.
会議が長引くにつれて、彼の忍耐力不足が増しました。
B2 verb /ɪnˈdʌldʒ/

indulge

楽しむ
Meaning
to allow oneself to enjoy something enjoyable, often excessively
Example
He indulged in a piece of chocolate cake after dinner.
彼はディナーの後でチョコレートケーキの一切れを楽しんだ。
B2 noun /ɪnˈsaɪdə/

insider

インサイダー
Meaning
a person within a group or organization who has access to confidential information
Example
He was an insider who knew all the company's secrets.
彼は会社のすべての秘密を知っているインサイダーでした。
B2 noun /ɪnˈvɒlvmənt/

involvement

関与
Meaning
the act of taking part in something
Example
His involvement in the project was crucial.
彼のプロジェクトへの関与は重要だった。
B2 verb ɪnˈvɛst.ɪŋ

investing

投資
Meaning
The act of putting money into financial schemes, shares, property, or a commercial venture with the expectation of achieving a profit.
Example
Investing in stocks can generate long-term wealth.
株式投資は長期的な富を生むことができます。
B2 noun /aɪˌdɛntɪfɪˈkeɪʃən/

identification

身分証明
Meaning
the process of recognizing or proving who or what someone or something is
Example
You need proper identification to enter the building.
ビルに入るには適切な身分証明が必要です。
B2 noun /ɪnˈsɪstəns/

insistence

強い要求
Meaning
the act of demanding something firmly or repeatedly
Example
At his insistence, we stayed longer.
彼の強い要求で、私たちは長く滞在しました。
B2 noun ɪnˈdʒʌstɪs

injustice

不正義
Meaning
Lack of fairness or justice; the practice of being unjust or unfair.
Example
The story portrays the injustices faced by the common people.
物語は一般の人々が直面する不正義を描いています。
B2 adjective /ˌɪnsəˈfɪʃənt/

insufficient

不十分
Meaning
Not enough; inadequate.
Example
His explanation was insufficient to clear the confusion.
彼の説明は混乱を解消するには不十分でした。
B2 adjective /ɪsˈlɑːmɪk/

islamic

イスラームの
Meaning
relating to Islam, its followers, or its teachings
Example
The city has many Islamic cultural centers.
その都市には多くのイスラーム文化センターがあります。
B2 noun ˌɪn.təˈven.ʃən

intervention

介入
Meaning
The action or process of intervening; involvement in a situation to improve or help it.
Example
The intervention of the UN was crucial in resolving the conflict.
国連の介入は紛争を解決する上で重要だった。
B2 noun /ɪnˈtɛnt/

intent

意図
Meaning
the purpose or reason behind an action; a strong determination to do something
Example
Her intent was to improve the quality of education in the community.
彼女の意図はコミュニティの教育の質を向上させることでした。
B2 noun ˈɪndɪkeɪtə

indicator

指標
Meaning
A thing that indicates the state or level of something.
Example
The unemployment rate is a key indicator of economic health.
失業率は経済の健康の重要な指標です。
B2 noun ˈɪn.frəˌstrʌk.tʃər

infrastructure

インフラストラクチャー
Meaning
The basic physical and organizational structures and facilities needed for the operation of a society or enterprise.
Example
Digital infrastructure is vital for future advancements.
デジタルインフラストラクチャーは将来の進歩にとって不可欠です。
B2 verb /ˌɪntərˈfɪər/

interfere

幸せ
Meaning
to become involved in something that is not your concern; to hinder or obstruct
Example
Parents should not interfere in their children’s personal choices.
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ませんでした。
B2 adjective /ɪnˈdɪf.ər.ənt/

indifferent

無関心
Meaning
having no particular interest or concern; not caring one way or another
Example
She was indifferent to the outcome of the match.
彼女は試合の結果に無関心だった。
B2 noun /ˌɪntərˈfɪərəns/

interference

干渉
Meaning
the action of interfering with something
Example
The radio signal was disrupted due to interference from nearby electronics.
近くの電子機器からの干渉で、ラジオ信号が途絶えました。
B2 adjective /ˌɪrɪˈzɪstəbəl/

Irresistible

抗し難い
Meaning
too attractive and tempting to be resisted; impossible to resist
Example
The chocolate cake was absolutely irresistible.
チョコレートケーキは絶対に抵抗できないほど魅力的だった。
B2 noun /ˌɪn.dɪˈkeɪ.ʃən/

Indication

指示; 合図
Meaning
a sign or piece of information that indicates something; a suggestion or hint
Example
The dark clouds were a clear indication that a storm was approaching the area.
暗い雲は嵐がその地域に近づいていることを示す明確な指示でした。
B2 adjective /ˌɪnɪˈfɪʃənt/

Inefficient

非効率的
Meaning
not achieving maximum productivity; wasteful of time or resources
Example
The old computer system was inefficient and wasted a lot of time.
古いコンピュータシステムは非効率的で、多くの時間を無駄にしました。
B2 adjective /ˈɪnfɪnɪt/

infinite

無限
Meaning
limitless or endless in space, extent, or number
Example
The universe is often described as infinite.
宇宙はしばしば無限だと説明されます。
B2 adjective /ˌɪntərˈmiːdiət/

intermediate

中級
Meaning
Coming between two things in time, place, or order; in the middle level or stage.
Example
She is taking an intermediate-level French course.
彼女は中級のフランス語コースを受講しています。
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。
B2 noun /ɪnˈvɛstɪˌɡeɪtər/

investigator

幸福
Meaning
a person who carries out a formal inquiry or investigation
Example
The investigator gathered evidence from the crime scene.
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ませんでした。
B2 noun ˈɪn.deks

index

インデックス
Meaning
An alphabetical list of names, subjects, etc. with references to the places where they occur, typically found at the end of a book; a sign or measure of something.
Example
An index organizes critical data.
インデックスは重要なデータを整理します。
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 /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。
B2 verb /ɪnˈsɜːrt/

insert

挿入する
Meaning
to put or place something into something else
Example
Please insert the key into the lock.
鍵をロックに挿入してください。
B2 noun /ɪnˈspɛktər/

inspector

検査官
Meaning
An official employed to ensure regulations are obeyed or standards are met.
Example
The inspector carefully checked the restaurant's kitchen for hygiene standards.
検査官はレストランのキッチンを衛生基準に従って慎重に確認しました。
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。
B2 noun /ɪnˈsen.tɪv/

Incentive

インセンティブ; 刺激
Meaning
a thing that motivates or encourages someone to do something; a reward or penalty that influences behavior
Example
The company offered a cash incentive to employees who exceeded their sales targets.
その会社は売上目標を達成した従業員に現金インセンティブを提供しました。
B2 verb /ˈɪntɪɡreɪt/

integrate

統合する
Meaning
To combine or bring together into a unified whole.
Example
The new system integrates data from multiple sources.
新しいシステムは複数のソースからデータを統合します。
B2 noun /ˈaɪkɒn/

icon

アイコン, 象徴
Meaning
A person or thing regarded as a symbol of something, or a graphic symbol on a screen.
Example
The singer became a cultural icon.
その歌手は文化的なアイコンとなった。
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 ˈɪn.tɪ.ɡreɪ.tɪd

integrated

統合された
Meaning
Combining or coordinating separate elements so as to provide a harmonious, interrelated whole.
Example
Integrated systems optimize efficiency.
統合されたシステムは効率を最適化します。
B2 verb /ɪnˈhæbɪt/

inhabit

住む
Meaning
to live in; to occupy as a dwelling
Example
Many animals inhabit the forest.
多くの動物が森に住んでいます。
B2 adjective /ˈɪɡ.nər.ənt/

Ignorant

無知
Meaning
lacking knowledge or awareness; uninformed
Example
She was ignorant about the new technology trends.
彼女は新しい技術のトレンドについて無知でした。
B2 noun /ˌaɪ.səˈleɪ.ʃən/

Isolation

隔離
Meaning
the process or fact of isolating or being isolated; separation from other people or things
Example
The patient was kept in isolation to prevent the spread of the infectious disease.
患者は感染症の拡大を防ぐために隔離されました。
B2 verb /ɪnˈherɪt/

inherit

相続する
Meaning
to receive money, property, or characteristics from someone when they die; to acquire from predecessors
Example
She inherited her grandmother's house.
彼女は祖母の家を相続しました。
B2 adjective /aɪˈrɒnɪk/

ironic

皮肉な、風刺的な
Meaning
happening in the opposite way to what is expected, often amusing or sarcastic
Example
It is ironic that the fire station burned down.
消防署が焼けるのは皮肉です。
B2 adjective /ɪnˈfɪə.ri.ər/

inferior

劣等
Meaning
Of lower quality, rank, or status.
Example
This material is inferior to the one we used before.
この素材は以前使ったものより劣っています。
B2 adjective ɪnˈdɪdʒɪnəs

indigenous

先住民の
Meaning
Originating or occurring naturally in a particular place; native.
Example
Indigenous plants are well adapted to the local environment.
先住民の植物は地元の環境にうまく適応しています。
B2 noun /ɪmˈpɒlɪtnəs/

impoliteness

無礼さ
Meaning
lack of good manners or courtesy; rude behavior
Example
His impoliteness towards the guests shocked everyone.
彼の客に対する無礼さは皆を驚かせた。
B2 verb ɪmˈpoʊz

imposes

課す
Meaning
To establish or apply by authority; to force something unwelcome or unfamiliar to be accepted or put in place.
Example
Pollution imposes harmful effects on the environment.
汚染は環境に有害な影響を課します。
B2 adjective /ˈɪmpæktfʊl/

impactful

インパクトがある
Meaning
Having a major impact or effect; powerful and forceful.
Example
Her impactful speech moved the audience to take action.
彼女のインパクトのあるスピーチは、聴衆を行動に駆り立てた。
B2 adjective /ɪˈmædʒ.ɪ.nər.i/

Imaginary

想像上の; 虚構の; 現実でない
Meaning
existing only in imagination; not real; fictional
Example
The child had an imaginary friend who she talked to every day.
その子は毎日話す想像上の友達がいました。
B2 verb /ɪnˈdʒɛkt/

inject

注射する
Meaning
To introduce a substance, especially a drug, into the body using a needle.
Example
The nurse will inject the vaccine into the patient's arm.
看護師は患者の腕にワクチンを注射します。
B2 noun /ɪnˈtɜː.prə.tər/

Interpreter

通訳者; 翻訳者;
Meaning
a person who translates orally from one language into another; someone who explains meaning
Example
The international conference hired professional interpreters to translate speeches in real time.
国際会議は、スピーチをリアルタイムで翻訳するためにプロの通訳者を雇いました。
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。
B2 noun /ˈɪnvənˌtɔːri/

inventory

インベントリ
Meaning
A complete list of items, such as goods in stock or property.
Example
The shopkeeper checked the inventory before opening the store.
店主は店を開店する前にインベントリを確認しました。
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。
B2 verb /ɪnˈʃʊər/

insure

保険をかける
Meaning
to provide insurance; to make certain
Example
I need to insure my new car.
私は新しい車を保険に入れる必要があります。
B2 adjective /ˌɪnsɪˈkjʊə/

insecure

不安定
Meaning
not confident or assured; uncertain and anxious
Example
She felt insecure about her performance in the exam.
彼女は試験での自分のパフォーマンスに不安を感じていました。
B2 adjective /ɪˈmjuːn/

immune

免疫の
Meaning
protected from disease or from the effects of something
Example
Children who are vaccinated are immune to many diseases.
予防接種を受けた子供たちは多くの病気に免疫があります。
B2 noun /ˈaɪrəni/

irony

皮肉
Meaning
a situation that is strange or amusing because it is the opposite of what is expected; the use of words to convey the opposite meaning
Example
The irony of the situation was that the winner forgot his own prize.
その状況の皮肉は、勝者が自分の賞を忘れたことでした。
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 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。
B2 adjective /ɪˈmens/

Immense

巨大な; 膨大な; 非常に大きい
Meaning
extremely large or great; huge
Example
The immense mountain range stretched across the horizon.
その巨大な山脈は地平線を越えて広がっていました。
B2 adverb /ɪmˈpeɪʃəntli/

impatiently

いらいらして
Meaning
in a manner showing annoyance or restlessness due to delay or waiting
Example
She tapped her fingers impatiently while waiting for the reply.
彼女は返事を待ちながらいらいらして指を叩いていた。
B2 noun /ˌɪntəˈrʌpʃən/

interruption

中断
Meaning
the act of stopping or breaking the continuity of something; a pause caused by an external action
Example
The meeting was delayed due to an unexpected interruption.
予期しない中断のため会議は遅れた。
B2 verb /ɪnˈheɪl/

inhale

吸う
Meaning
to breathe in; to draw air into the lungs
Example
Take a deep breath and inhale slowly.
深く息を吸い、ゆっくり吸い込みます。
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。
B2 noun /ɪˈluː.ʒən/

Illusion

幻想
Meaning
a thing that is or is likely to be wrongly perceived or interpreted; a false idea or belief
Example
The magician created a spectacular illusion that made the elephant appear to vanish.
魔術師は壮観な幻想を作り、象が消えるように見えました。
B2 verb ˈɪmplɪmentɪd

implemented

実施された
Meaning
Put a decision or plan into effect; carried out or executed.
Example
The master plans were partially implemented.
マスタープランは部分的に実施されました。
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。
B2 noun ˌɪr.ɪˈɡeɪ.ʃən

irrigation

灌漑
Meaning
The artificial application of water to land or soil.
Example
Irrigation systems improve crop yields in dry regions.
灌漑システムは乾燥した地域で作物の収穫量を増加させます。
B2 adjective /ɪnˈtækt/

intact

完全
Meaning
Remaining whole, complete, and undamaged.
Example
Despite the storm, the old house remained intact.
嵐にもかかわらず、古い家は完全な状態を保っていました。
B2 verb /ɪnˈfɜːr/

infer

Meaning
to conclude or deduce something from evidence and reasoning rather than from explicit statements
Example
From his silence, I inferred that he was not happy with the decision.
B2 noun, verb /ɪntʃ/

inch

インチ / ゆっくり動く
Meaning
A unit of length equal to 2.54 centimeters; or to move slowly and carefully in small amounts.
Example
She inched closer to the edge of the stage.
彼女はステージの端にゆっくり近づいた。
B2 noun /ˈɪm.pʌls/

Impulse

衝動; 突然の欲求
Meaning
a sudden strong and unreflective urge or desire to act; a driving force or motivation
Example
She bought the expensive dress on impulse and later regretted the purchase.
彼女は衝動で高価なドレスを買い、後でその購入を後悔しました。
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。
B2 adjective ˈaɪsəˌleɪtɪd

isolated

孤立した
Meaning
Alone or separated from others; having little or no contact with other people.
Example
Technological advancements often leave people isolated.
技術の進歩はしばしば人々を孤立させる。
B2 adjective /ˌɪnstɪˈtjuːʃənl/

institutional

制度的
Meaning
Relating to an organization or established practice.
Example
The government made several institutional reforms in education.
政府は教育においていくつかの制度的改革を実施しました。
B2 noun ɪˈmjuː.nɪ.ti

immunity

免疫力
Meaning
The ability of an organism to resist a particular infection or toxin by the action of specific antibodies.
Example
A strong immunity protects against infections.
強い免疫力は感染症から守ります。
B2 noun /ˈɪn.vɔɪs/

Invoice

請求書
Meaning
a list of goods sent or services provided, with a statement of the sum due for these
Example
The company sent an invoice for the office supplies delivered last week.
会社は先週配送されたオフィス用品の請求書を送付しました。
B2 noun, verb /ˈɪnstɪˌtjuːt/

institute

インスティチュート
Meaning
as a noun, an organization founded for a specific purpose; as a verb, to establish or initiate
Example
The university decided to institute new rules for the library.
大学は図書館のために新しいルールを設立することを決定しました。
B2 noun ˌɪn.tɪˈɡreɪ.ʃən

integration

統合。統一。
Meaning
The action or process of integrating; the process of combining or adding parts to make a unified whole.
Example
Integration of networks will improve global communication.
ネットワークの統合は、グローバルなコミュニケーションを改善します。
B2 noun /ˌɪm.ɪˈteɪ.ʃən/

Imitation

模倣; コピー; レプリカ
Meaning
the action of using someone or something as a model; a copy of something original
Example
His imitation of the famous actor was so good that everyone burst into laughter.
彼の有名な俳優のイミテーションはとても上手で、みんなが笑い出しました。
B2 noun /ˈɪntərfeɪs/

interface

インターフェイス
Meaning
a point where two systems, subjects, or organizations meet and interact
Example
The user interface is designed to be intuitive and user-friendly.
ユーザーインターフェイスは直感的で使いやすく設計されています。
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 adverb /ɪnˈɛvɪtəbli/

inevitably

避けられない
Meaning
in a way that cannot be avoided or prevented
Example
Inevitably, the team faced challenges during the project.
避けられないことに、チームはプロジェクト中に挑戦に直面しました。
B2 adjective /aɪˈdentɪkəl/

Identical

同一の; 全く同じ
Meaning
exactly the same; not different in any way
Example
The twins look completely identical to each other.
双子は完全に同じに見えます。
B2 verb ˈɪmplɪment

implement

実施する
Meaning
To put a decision or plan into effect; to execute or apply.
Example
Implementing educational policies is essential for progress.
教育政策を実施することは進歩にとって重要です。
B2 adjective /ˌɪnkəmˈpliːt/

incomplete

不完全
Meaning
Not finished, lacking some parts or not whole.
Example
Her report was incomplete and needed further details.
彼女の報告は不完全で、詳細が必要でした。
B2 adjective /ɪmˈpɪəriəl/

imperial

帝国の
Meaning
Relating to an empire or emperor; having supreme authority.
Example
The imperial palace was a symbol of the emperor's power.
インペリアル宮殿は皇帝の力の象徴でした。
B2 adjective /ɪmˈper.ə.tɪv/

imperative

命令形
Meaning
Of vital importance; crucial; giving or expressing a command.
Example
It is imperative to address the climate crisis immediately.
気候危機に直ちに対処することがインペラティブです。
B2 adverb /ɪmˈpɒlɪtli/

impolitely

無礼に
Meaning
in a rude or discourteous manner; without showing respect or proper manners
Example
He spoke impolitely to the waiter despite the polite service.
丁寧なサービスにもかかわらず、彼は無礼にウェイターに話した。
B2 noun /aɪˈdiː/

id

身分証明書
Meaning
identification; a document or number used to prove who someone is
Example
Please show your ID at the entrance.
入口で身分証明書を提示してください。
B2 noun ˌɪn.fləˈmeɪ.ʃən

inflammation

炎症
Meaning
A localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful.
Example
Chronic inflammation can lead to severe diseases.
慢性炎症は重篤な疾患を引き起こす可能性があります。
B2 verb /ɪnˈtriːɡ/

intrigue

魅了する
Meaning
to arouse curiosity or interest; to make someone fascinated
Example
The mystery novel will intrigue any reader.
ミステリー小説はすべての読者を魅了するでしょう。
B2 adjective ˌɪnstrəˈmɛntl

instrumental

重要な
Meaning
Serving as a crucial means, agent, or tool; having a part in bringing about a result.
Example
Children can be instrumental in building a better society.
子供たちは、より良い社会を作るために重要な役割を果たすことができます。
B2 noun /ˈɪnˌsaɪt/

insight

洞察力
Meaning
The ability to understand the true nature of something; deep understanding.
Example
Her insight into human behavior made her a successful psychologist.
彼女の人間行動に対する洞察力は、彼女を成功した心理学者にした。
B2 adjective /ɪˈrɛləvənt/

Irrelevant

無関係な
Meaning
not connected with or relevant to something; having no bearing on the matter
Example
Your past mistakes are irrelevant to this discussion.
あなたの過去の過ちはこの議論には無関係です。
B2 adjective /ˌɪnfluˈenʃəl/

Influential

影響力のある; 強力な
Meaning
having great influence on someone or something; powerful; persuasive
Example
She is an influential leader in the community.
彼女はコミュニティの中で影響力のあるリーダーです。
B2 adjective /ɪnˈstrʌkʃənəl/

instructional

教育的な
Meaning
providing knowledge or information; intended to teach
Example
The website offers many instructional videos for beginners.
このウェブサイトは初心者向けに多くの教育的なビデオを提供しています。
B2 noun /ˌɪnsɪˈkjʊərɪti/

insecurity

不安感
Meaning
lack of confidence or assurance; a state of uncertainty or vulnerability
Example
Her insecurity made her doubt her abilities despite her experience.
彼女の不安感は彼女に自分の能力を疑わせた。
B2 adjective ɪnˈev.ɪ.tə.bəl

inevitable

避けられない
Meaning
Certain to happen; unavoidable.
Example
Death is an inevitable part of life.
死は人生の避けられない一部です。
B2 adjective /aɪˈrɒnɪkəl/

ironical

皮肉な
Meaning
expressing irony; having the nature of irony
Example
Her ironical tone made everyone uncomfortable.
彼女の皮肉な口調は、皆を不快にさせました。
B2 adjective /ɪnˈklaɪnd/

inclined

傾向がある
Meaning
having a tendency or disposition toward something
Example
He is inclined to help those in need.
彼は困っている人々を助ける傾向がある。
B2 adjective /ɪnˈtɛns/

intense

強烈
Meaning
Of extreme force, degree, or strength.
Example
She felt intense pain after the accident.
事故後、彼女は強烈な痛みを感じました。
B2 adjective /ˈɪrɪteɪtɪd/

irritated

いらいらした
Meaning
feeling annoyed or impatient; having inflamed or sore physical condition
Example
She felt irritated by the constant noise outside her window.
窓の外の絶え間ない騒音に彼女はいらいらした。
B2 verb /ɪnˈkɔːrpəreɪt/

incorporate

組み込む
Meaning
to include something as part of a whole; to form a corporation
Example
The new design incorporates advanced technology.
新しいデザインは先進技術を組み込みます。
B2 noun /ˈɪnstɪŋkt/

instinct

本能
Meaning
A natural way of behaving or reacting that does not require learning.
Example
Birds build nests by instinct.
鳥は本能で巣を作ります。
B2 adjective ˈɪn.tɪ.ɡrəl

integral

不可欠
Meaning
Necessary to make a complete whole; essential or fundamental.
Example
Exercise is an integral part of a healthy lifestyle.
運動は健康的なライフスタイルの不可欠な部分です。
B2 adjective /ˈɪn.tɪ.mət/

Intimate

親密な; 個人的な; 詳細な知識
Meaning
close in friendship; private and personal; detailed knowledge
Example
They have an intimate friendship that has lasted for decades.
彼らは何十年にもわたる親密な友情を持っています。
B2 adjective /ɪmˈprɒp.ər/

Improper

不適切な; 不正確な; 不適当な
Meaning
inappropriate; incorrect; not suitable
Example
It would be improper to discuss personal matters in a business meeting.
ビジネス会議で個人的な事柄を議論するのは不適切です。
B2 noun ɪnˈtɛɡrɪti

integrity

誠実
Meaning
The quality of being honest and having strong moral principles; moral uprightness.
Example
Teachers' integrity fosters a positive learning environment.
教師のインテグリティは、積極的な学習環境を促進します。
B2 adjective /ˈaɪsi/

Icy

氷のような; 非常に冷たい; 敵対的
Meaning
extremely cold; covered with ice; unfriendly or hostile
Example
The icy wind made everyone shiver.
氷のような風が皆を震えさせた。
B2 verb /ˌɪntərˈviːn/

intervene

介入する
Meaning
To come between people, groups, or events, often to prevent conflict or improve a situation.
Example
The teacher had to intervene to stop the fight between the students.
教師は生徒たちの間で喧嘩を止めるために介入しなければならなかった。
B2 noun /ˈɪdɪət/

idiot

バカ
Meaning
a person who acts in a way that is considered very stupid or foolish
Example
He acted like an idiot at the party last night.
彼は昨晩のパーティーでイディオットのように振る舞った。
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。
B2 adjective /ɪnˈseɪn/

insane

狂気
Meaning
mentally ill; extremely foolish or unreasonable
Example
The idea of jumping off the cliff seemed insane.
崖から飛び降りる考えは狂気のように思えた。
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。
B2 adjective /ˌɪn.trəˈdʌk.tər.i/

introductory

導入の
Meaning
Serving as an introduction; preliminary or preparatory.
Example
The professor gave an introductory lecture on economics.
教授は経済学についての導入の講義を行いました。
B2 adjective /ˌɪnkənˈsɪstənt/

inconsistent

一貫性がない
Meaning
Not staying the same throughout; lacking harmony or regularity.
Example
His answers were inconsistent and confusing.
彼の答えは一貫性がなく、混乱を招いた。
B2 noun /ˌɪmpərˈfɛkʃən/

imperfection

不完全
Meaning
a flaw, defect, or weakness; the state of being imperfect
Example
She accepted her imperfection as part of being human.
彼女は人間であることの一部として自分の不完全さを受け入れた。
B2 noun /ˈɪnfənt/

infant

乳児
Meaning
A very young child or baby.
Example
The infant was sleeping peacefully in the cradle.
乳児はゆりかごで静かに眠っていました。
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。