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C1 adjective /ɪnˈɛlɪdʒəbəl/

Ineligible

不適格; 無資格; 選ばれない
Meaning
not qualified or entitled to participate or be chosen; unsuitable
Example
Students with poor grades are ineligible for the scholarship program.
成績が悪い学生は奨学金プログラムに応募できません。
A2 noun /ˌɪnvɪˈteɪʃən/

invitation

幸せ
Meaning
a written or spoken request to attend an event or to participate in something
Example
She sent me an invitation to her wedding.
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。
C2 verb /ˌɪntərˈsiːd/

intercede

Meaning
to act or plead on behalf of someone in difficulty or trouble; to intervene between parties to help resolve a dispute
Example
She interceded with the teacher to give her brother another chance.
C1 adjective /ɪnˈstɪŋk.tɪv/

instinctive

本能的, 自然な, 自動的
Meaning
Based on instinct; done without conscious thought; natural and automatic.
Example
His instinctive reaction saved his life.
彼の本能的な反応は彼の命を救った。
C2 verb /ˌɪntərˈpoʊz/

interpose

Meaning
To place or insert between one thing and another; to intervene in a situation.
Example
He quickly interposed himself between the fighters to stop the quarrel.
A2 noun /ˈɪn.sekt/

Insect

昆虫
Meaning
a small invertebrate animal with six legs and usually one or two pairs of wings
Example
The butterfly is a beautiful insect that flies from flower to flower.
蝶は花から花へと飛ぶ美しい昆虫です。
C1 adjective /ɪmˈpɜːrviəs/

impervious

透過しない
Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
ジャケットは雨に透過しません。
C2 adjective /ɪˈnjʊərd/

inured

慣れた
Meaning
Accustomed to something, especially something unpleasant.
Example
After years of hardship, she was inured to suffering.
長年の苦しみの後、彼女は苦しみに慣れていた。
C2 adjective /ˌaɪdəˈlɑːtrɪəs/

idolatrious

偶像崇拝的な
Meaning
Excessively devoted or reverent towards idols or false gods.
Example
The ancient tribe was known for its idolatrious practices.
その古代の部族は偶像崇拝的な習慣で知られていました。
C1 noun /ɪnˈdɪf.ər.əns/

Indifference

無関心; 無関心さ; アパシー
Meaning
lack of interest, concern, or sympathy; the state of not caring about something
Example
His indifference to his studies resulted in poor grades throughout the semester.
彼の学業に対する無関心さが、学期中ずっと悪い成績をもたらした。
C1 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。
B1 adjective /ɪmˈpres.ɪv/

Impressive

印象的な
Meaning
striking; remarkable; having the ability to impress
Example
Her impressive performance earned her a standing ovation.
彼女の印象的な演技はスタンディングオベーションを受けた。
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。
C1 verb /ɪmˈplɔːr/

implore

Meaning
To beg someone earnestly or desperately to do something.
Example
She implored him to stay with her.
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。
C1 adjective ˈɪn.lənd

Inland

内陸
Meaning
Situated in the interior of a country; away from the coast.
Example
Inland transport boosts local trade.
内陸輸送は地元の貿易を促進します。
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 adjective /ɪnˈtɛnsɪv/

intensive

集中的
Meaning
Involving a lot of effort, energy, or concentration in a short period of time.
Example
She attended an intensive English course before moving abroad.
彼女は海外に引っ越す前に、集中的な英語コースを受講しました。
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。
A1 noun /ˈaɪs kriːm/

Ice-cream

アイスクリーム
Meaning
a frozen sweet dessert made from dairy products, usually served cold
Example
Children love to eat ice-cream on hot summer days.
子供たちは暑い夏の日にアイスクリームを食べるのが好きです。
C1 adjective /ɪnˈveɪsɪv/

invasive

侵襲的
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
医者は、その手順が最小限の侵襲的であることを説明しました。
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。
A2 adverb /ɪnˈstɛd/

instead

代わりに
Meaning
As an alternative or substitute.
Example
She didn’t buy the dress; instead, she chose a pair of shoes.
彼女はドレスを買わなかった。代わりに、彼女は靴を選んだ。
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。
C1 noun /ˌɪndɪɡˈneɪʃən/

indignation

憤慨
Meaning
Strong displeasure or anger caused by something unjust, offensive, or insulting.
Example
Public indignation grew after the unfair verdict.
不公平な判決の後で、公衆の憤慨が高まった。
C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

不規則性
Meaning
lack of regularity or consistency; a deviation from what is normal, expected, or orderly
Example
The audit revealed several financial irregularities in the company’s records.
監査により、その会社の記録にいくつかの財務上の不規則性が明らかになった。
B2 adjective aɪˈkɒnɪk

iconic

象徴的な
Meaning
Very famous or popular, especially being considered to represent particular opinions or a particular time.
Example
The line "It was the best of times..." is iconic.
"それは最良の時代だった…"というセリフは象徴的です。
C2 noun /ˈɪndɪkənt/

indicant

指標
Meaning
Something that indicates or points to a fact or condition.
Example
High fever is often an indicant of infection.
高熱はしばしば感染の指標となります。
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。
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 /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 verb /ˈaɪdəlaɪz/

idolize

偶像視する
Meaning
To admire or worship someone excessively.
Example
Fans often idolize celebrities for their talent and lifestyle.
ファンはしばしばその才能とライフスタイルのために有名人を偶像視します。
C1 adjective ɪnˈsaɪ.sɪv

incisive

鋭い
Meaning
Intelligently analytical and clear-thinking; showing clear thought and good understanding of what is important.
Example
His incisive comments revealed the core issues.
彼の鋭いコメントは核心的な問題を明らかにしました。
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 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 ɪnˈfiː.zə.bəl

infeasible

不可能
Meaning
Not possible to do easily or conveniently; impracticable.
Example
Restoring the forest may become infeasible if destruction continues.
森林の回復は、破壊が続くと不可能になる可能性があります。
C1 adjective /ˈɪntrɪkət/

intricate

複雑
Meaning
very detailed, complex, and difficult to understand
Example
The artist created an intricate pattern on the wall.
アーティストは壁に複雑な模様を作り出しました。
C2 verb /ɪnˈsɪnəˌreɪt/

incinerate

焼却する
Meaning
to burn something completely until it is reduced to ashes
Example
The city decided to incinerate the medical waste for safety.
その都市は安全のために医療廃棄物を焼却することを決定しました。
C1 noun /ɪnˌtɪmɪˈdeɪʃən/

intimidation

威圧
Meaning
The action of frightening or threatening someone to make them do something.
Example
The workers reported cases of intimidation by the management.
労働者たちは経営陣による威圧の事例を報告しました。
C1 noun ɪmˈpɛə(r)mənt

impairment

損傷、障害
Meaning
The state of being damaged or weakened; a disability or handicap.
Example
Hearing impairment can be caused by long-term exposure to loud noise.
聴力障害は長期間の大きな音への曝露によって引き起こされる可能性があります。
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。
C2 adjective /ɪnˈsɛnseɪt/

insensate

無感情な
Meaning
lacking physical sensation or empathy; without feeling or sensitivity
Example
The dictator's insensate cruelty shocked the world.
独裁者の無感情な残虐さは世界を驚かせた。
C1 adjective ˌɪn.trəˈspek.tɪv

introspective

内省的
Meaning
Characterized by or given to introspection; examining one's own thoughts and feelings.
Example
Writers tend to be highly introspective individuals.
作家はしばしば非常に内省的な人々である。
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。
B2 verb /ɪnˈflɪkt/

inflict

加える
Meaning
to cause something unpleasant or painful to be suffered by someone or something
Example
The storm inflicted considerable damage to the city.
嵐は都市にかなりの被害を与えました。
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。
C1 noun /ɪˈmɜː.ʃən/

immersion

没入
Meaning
Complete engagement in an environment or experience.
Example
Immersion in VR games makes users feel like they are inside the virtual world.
VRゲームへの没入は、ユーザーが仮想世界にいるように感じさせます。
C1 verb /ɪmˈpɛər/

impair

損なう
Meaning
to weaken or damage something, especially a function or ability
Example
Smoking can impair your lung capacity.
喫煙は肺活量を害する可能性があります。
A2 noun /ˈɪlnəs/

illness

病気
Meaning
A condition of being unwell or suffering from a disease.
Example
She missed school due to a serious illness.
彼女は深刻な病気のため学校を休んだ。
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。
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.
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。
C1 noun /ˌɪnkəmˌpætəˈbɪlɪti/

incompatibility

非互換性
Meaning
the state of being unable to exist or work together harmoniously; lack of compatibility
Example
The project failed because of incompatibility between the two software systems.
2つのソフトウェアシステムの非互換性のため、そのプロジェクトは失敗した。
C1 noun /ɪmˈpɛdɪmənt/

impediments

障害
Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
経済的な障害はしばしば社会的発展を妨げる。
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 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 /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。
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。
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 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。
C1 noun /ˌɪnkjʊˈbeɪʃən/

incubation

卵、細胞、または生物を適切な条件で発展させるプロセス
Meaning
the process of keeping eggs, cells, or organisms in the right conditions for development
Example
The incubation of the eggs lasted for three weeks.
卵のインキュベーションは三週間続きました。
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 verb /ɪmˈpeɪl/

impale

突き刺す
Meaning
to pierce or fix something with a sharp object
Example
The knight was impaled by the enemy’s spear.
騎士は敵の槍で突き刺さった。
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。
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 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。
A1 preposition/adverb/adjective/noun /ˌɪnˈsaɪd/

inside

幸せ
Meaning
Situated within something; the inner part of something.
Example
She waited inside the house until the rain stopped.
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。
C1 adjective /ɪˈnɔːrdənət/

inordinate

過度の
Meaning
Excessive or unusually large in degree.
Example
She spent an inordinate amount of time on her phone.
彼女は電話に過度の時間を費やしました。
C1 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。
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 /ɪnˈtɜːr/

inter

埋葬する
Meaning
To bury a dead body in the ground.
Example
They decided to inter the soldier with full honors.
彼らは兵士を全ての名誉を持って埋葬することに決めた。
A2 adjective /ˈɪntrəstɪd/

interested

興味がある
Meaning
Showing curiosity or concern about something.
Example
She is very interested in learning new languages.
彼女は新しい言語を学ぶことにとても興味がある。
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。
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。
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。
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。
B2 noun ˌɪnɪˈkwɒlɪti

inequality

不平等
Meaning
Difference in size, degree, circumstances, etc.; lack of equality.
Example
The theme of inequality is prominent throughout the story.
不平等のテーマは物語全体にわたって顕著です。
A2 preposition /ɪnˈkluːdɪŋ/

including

含む
Meaning
used to show that someone or something is part of a larger group
Example
Many people attended the event, including students and teachers.
多くの人々がイベントに参加しました、学生や教師を含む。
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 ɪˈneɪt

Innate

生まれつきのまたは自然の
Meaning
Existing from birth or natural
Example
She has an innate talent for music.
彼女は音楽において生まれつきの才能を持っている。
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.
C1 noun ˌɪn.fɪlˈtreɪ.ʃən

infiltration

浸透、秘密のアクセス
Meaning
The process of entering or gaining access to an organization or place surreptitiously.
Example
Cybersecurity prevents infiltration into sensitive data.
サイバーセキュリティは、機密データへの浸透を防ぎます。
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。
C1 adjective /ɪnˈsɪdiəs/

insidious

陰険な
Meaning
Proceeding in a gradual, subtle way but with harmful effects.
Example
The insidious spread of misinformation can damage trust.
誤った情報の陰険な広がりは信頼を傷つける可能性がある。
C1 noun ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

先住民の伝統
Meaning
Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.
Example
Indigenous traditions in the Chittagong Hill Tracts are unique.
チッタゴン丘陵地帯の先住民の伝統はユニークです。
C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

輸入
Meaning
The act of bringing goods or services into a country from abroad
Example
The importation of luxury goods is strictly regulated.
高級品の輸入は厳しく規制されています。
B1 noun /ɪnˈstrʌkʃənz/

instructions

指示
Meaning
Detailed information on how something should be done or operated.
Example
Please follow the instructions on the box.
箱に書かれた指示に従ってください。
C1 noun /ɪmˈbæl.əns/

Imbalance

不均衡
Meaning
lack of proportion or relation between corresponding things; unequal distribution
Example
The doctor said the patient's dizziness was caused by an inner ear imbalance.
医者は患者のめまいが内耳の不均衡によって引き起こされたと言いました。
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。
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。
C2 noun /ɪnˈvɛstɪtʃər/

investiture

任命式
Meaning
the formal ceremony of conferring authority, rank, or office
Example
The king held an investiture ceremony for the new knight.
王は新しい騎士のために任命式を開催しました。
B1 noun ˈɪmpækt

impact

影響
Meaning
A strong effect or influence; the action of one object coming forcibly into contact with another.
Example
The decision had great impact.
その決定は大きな影響を与えた。
C2 adjective /ˌɪndɪˈtɜːrmənət/

indeterminate

不確定
Meaning
Not exactly known, defined, or established; vague or uncertain.
Example
The project was delayed for an indeterminate amount of time.
プロジェクトは不確定な期間に延期されました。
C2 adjective /ˌɪnsəˈpɔːrtəbl̩/

insupportable

耐えられない
Meaning
Too extreme or difficult to be endured.
Example
The heat was insupportable during the long journey.
長い旅の間、暑さは耐えられなかった。
C1 adjective /ɪˈluː.sɪv/

Illusive

幻想的な; 存在しているように見えるが実際には存在しない; 騙すような
Meaning
deceptive; appearing to exist but not real; misleading
Example
The promise of easy money proved to be illusive and misleading.
簡単なお金の約束は幻想的であり、誤解を招くものでした。
B1 adjective /ˌɪmpəˈlaɪt/

impolite

無礼
Meaning
Not showing good manners; rude.
Example
It is impolite to interrupt someone while they are speaking.
誰かが話しているときに邪魔をするのは失礼です。
C1 adjective /ɪnˈtɜːrmənəbl/

interminable

終わりのない
Meaning
Seemingly endless; having no apparent end.
Example
The meeting felt interminable and exhausting.
会議は終わりのない疲れるもののように感じた。
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 /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。
B2 verb /ɪnˈsʌlt/

insult

侮辱する
Meaning
to speak or act in a way that hurts someone's feelings or shows disrespect
Example
He felt insulted by her rude comments.
彼は彼女の失礼なコメントで侮辱されたと感じた。
C1 noun /ɪmˌpɒsəˈbɪlɪti/

impossibility

不可能性
Meaning
the state or fact of being impossible; something that cannot be done or achieved
Example
Finishing the project in one day was an impossibility.
一日でそのプロジェクトを終えるのは不可能だった。
C1 adverb /ˈɪnwərdli/

inwardly

内面的に
Meaning
In the mind or spirit; not outwardly visible.
Example
She smiled outwardly but inwardly she was worried.
彼女は外見では微笑んだが、内心では心配していた。
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。
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。
C2 verb /ˌɪmpɔːrˈtuːn/

importune

しつこく頼む
Meaning
To ask someone persistently or pressingly for something
Example
The child importuned his mother for a new toy.
その子供は新しいおもちゃを欲しがって母親にしつこく頼んだ。
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。
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。
C1 adjective /ˈɜːrksəm/

irksome

迷惑的
Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
長い列に並んでいるのは、最も迷惑な作業の一つです。
C1 verb /ɪmˈbɛd/

imbed

埋め込む
Meaning
To fix firmly or deeply in a surrounding mass.
Example
The journalist imbedded himself with the troops to report firsthand.
ジャーナリストは部隊に埋め込まれて、最前線から報告を行った。
C2 adjective /ɪnˈkɒŋɡruənt/

incongruent

不一致な
Meaning
Not in harmony or keeping with the surroundings or other aspects.
Example
His casual outfit looked incongruent at the formal dinner.
彼のカジュアルな服装は正式なディナーで不一致に見えた。
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。
C1 noun ɪnˌten.sɪ.fɪˈkeɪ.ʃən

intensification

強化
Meaning
The process of becoming or making something more intense or extreme.
Example
The intensification of climate change requires urgent action.
気候変動の強化は緊急の行動を必要とします。
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 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。
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。
C1 noun /ˌɪnkɑːrˈneɪʃən/

incarnation

化身
Meaning
the embodiment of a deity, spirit, or quality in a physical form
Example
The monk was considered the incarnation of compassion.
その僧侶は慈悲の化身と見なされていた。
C1 verb /ɪnˈsɪnjueɪt/

insinuate

Meaning
To suggest or hint something indirectly and often unpleasantly.
Example
He insinuated that she had lied about her qualifications.
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。
C1 adjective /ɪˈnɒkjuəs/

innocuous

無害な
Meaning
Not harmful or offensive.
Example
His remark was completely innocuous and not meant to offend anyone.
彼の発言は完全に無害で、誰かを傷つける意図はなかった。
C1 noun /ɪmˈpjʊərəti/

impurity

不純物
Meaning
the state of being unclean or contaminated; a substance that makes something impure
Example
The scientist removed every impurity from the water sample.
科学者は水のサンプルからすべての不純物を取り除いた。
B2 verb /ɪmˈpoʊz/

impose

課す
Meaning
to force someone to accept something; to establish or apply by authority
Example
The government imposed new taxes on luxury goods.
政府は高級品に新しい税を課した。