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 /ˌaɪ.diˈɒl.ə.dʒi/

ideology

イデオロギー

Meaning

A system of ideas and ideals, especially one that forms the basis of economic or political theory and policy.

Example

Democracy is based on the ideology of freedom and equality.

民主主義は自由と平等のイデオロギーに基づいています。

B1 noun /ɪnˈʃʊərəns/

insurance

保険

Meaning

An arrangement by which a company provides compensation for loss, damage, or illness in return for a premium.

Example

He bought health insurance to cover medical expenses.

彼は医療費をカバーするために健康保険に加入しました。

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。

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。

C1 verb /ɪnˈkrɪmɪˌneɪt/

incriminate

有罪にする

Meaning

to make someone appear guilty of a crime or wrongdoing

Example

The new evidence could incriminate the suspect in the robbery case.

新しい証拠がロビー事件の容疑者を有罪にする可能性があります。

B1 noun /ˈɪnstəns/

instance

例

Meaning

An example or single occurrence of something.

Example

This is just one instance of his generosity.

これは彼の寛大さの一例です。

B2 noun /ɪnˈfek.ʃən/

Infection

感染

Meaning

the process of infecting or the state of being infected; a disease caused by germs

Example

The doctor prescribed antibiotics to treat the bacterial infection in her throat.

医師は彼女の喉の細菌感染を治療するために抗生物質を処方しました。

C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

許しがたい

Meaning

Too bad to be justified or overlooked; unforgivable.

Example

His rude behavior was inexcusable.

彼の無礼な行動は許しがたいものでした。

C2 noun /ɪnˈsaɪzər/

incisor

切歯

Meaning

a narrow-edged tooth at the front of the mouth, adapted for cutting

Example

The dentist noted that his upper left incisor was chipped.

歯科医は彼の上の左側の切歯が欠けていることに気づきました。

C1 adjective /ɪnˈstrʌktɪv/

instructive

教育的

Meaning

useful and informative; providing knowledge or instruction

Example

The lecture was highly instructive and engaging.

その講義は非常に教育的で魅力的でした。

C2 adjective /ˌɪnfəˈlɪsɪtəs/

infelicitous

不適切な

Meaning

not suitable or well chosen; awkward or unfortunate

Example

His infelicitous remark ruined the atmosphere of the meeting.

彼の不適切な発言は会議の雰囲気を台無しにしました。

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。

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。

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。

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。

A2 adverb /ˌɪnˈdɔːrz/

indoors

屋内で

Meaning

inside a building; within an enclosed space

Example

Because of the rain, everyone stayed indoors.

雨のため、みんな屋内で過ごしました。

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。

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。

B2 verb /ɪmˈplaɪ/

imply

暗示する

Meaning

To suggest something without directly stating it.

Example

Her tone seemed to imply that she was upset.

彼女の口調は、彼女が怒っていることを示唆しているようでした。

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 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。

C1 verb /ɪˈnɔːɡjʊreɪt/

inaugurate

Meaning

To formally begin or introduce something, especially with a ceremony.

Example

The mayor will inaugurate the new bridge tomorrow.

C2 verb /aɪˈtɪnəˌreɪt/

itinerate

旅行する

Meaning

To travel from place to place, usually for the purpose of work or preaching.

Example

The missionary itinerated throughout the region to spread the message.

伝道師は地域を巡り、メッセージを広めました。

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。

C1 noun ˌɪnsjʊˈleɪʃən

insulation

絶縁

Meaning

Material used to prevent heat, sound, or electricity from being transmitted from one area to another.

Example

Insulation of food storage areas can prevent pests from entering.

食品保管エリアの絶縁は、害虫が侵入するのを防ぐことができます。

B1 noun ˌɪn.stɪˈtjuː.ʃən

institution

機関

Meaning

An organization founded and united for a specific purpose; an established law, practice, or custom.

Example

Institutions play a crucial role in governance.

機関はガバナンスにおいて重要な役割を果たしています。

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。

C1 noun /ˈɪnkwest/

inquest

調査

Meaning

A legal or official inquiry, especially into the cause of a death.

Example

The inquest revealed the cause of the accident.

調査は事故の原因を明らかにしました。

C1 noun /ˌɪn.dɪˈsɪʒ.ən/

Indecision

優柔不断; 決断力の欠如; 迷い

Meaning

the inability to make decisions quickly; uncertainty about what to do

Example

Her indecision about which job offer to accept caused her to miss both opportunities.

どの仕事のオファーを受けるかについての優柔不断さが、両方のチャンスを逃す原因となった。

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 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。

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。

C2 adjective/noun /ɪnˈkɑːrnədiːn/

incarnadine

深紅

Meaning

a bright crimson or pinkish-red color

Example

The sky turned incarnadine at sunset.

太陽が沈むと空は深紅色に変わった。

A2 verb /ɪnˈvaɪt/

invite

招待する

Meaning

to ask someone to come to an event or to do something

Example

We should invite all our friends to the party.

パーティーに友達を招待するべきです。

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。

B1 adverb /ˈɪnstəntli/

instantly

すぐに

Meaning

immediately, without any delay

Example

He replied instantly to the message.

彼はすぐにメッセージに返事をした。

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。

B1 verb /ɪnˈkriːst/

increased

増加した

Meaning

became greater in size, amount, or degree

Example

The company's revenue increased last year.

会社の収益は昨年増加しました。

C1 noun /ˈɪnstɪˌɡeɪtər/

instigator

扇動者

Meaning

A person who brings about or initiates something, usually something bad.

Example

The police identified him as the instigator of the violence.

警察は彼を暴力の扇動者として特定しました。

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。

A1 conjunction /ɪf/

if

もし

Meaning

used to introduce a condition or supposition

Example

If it rains tomorrow, we will stay home.

もし明日雨が降ったら、私たちは家にいます。

C1 adjective /ɪnˈsɒlvənt/

insolvent

破産

Meaning

unable to pay debts owed

Example

The insolvent firm could not meet its financial obligations.

破産した企業は財務義務を果たせなかった。

C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

本質的でない

Meaning

not necessary or important; not essential

Example

The report removes all inessential details to stay focused.

その報告書は焦点を保つために本質的でない詳細を削除している。

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。

C1 noun /ˈɪnˌmeɪt/

inmate

囚人

Meaning

a person confined to an institution such as a prison or hospital

Example

The prison has over a thousand inmates.

刑務所には千人以上の囚人がいます。

C1 adjective /ˈɪnərmoʊst/

Innermost

最も深い; 最も個人的な

Meaning

most private and secret; deepest; most personal

Example

She shared her innermost feelings with her closest friend.

彼女は最も深い感情を最も親しい友人と共有しました。

B1 verb /ɪmˈprɛs/

impress

感動させる

Meaning

to cause someone to feel admiration or respect

Example

Her speech managed to impress the audience.

彼女のスピーチは聴衆を感動させました。

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 /ˌɪrɪˈdɛsənt/

iridescent

虹色の

Meaning

showing luminous colors that seem to change when seen from different angles

Example

She wore an iridescent dress that sparkled in the light.

彼女は光の中で輝く虹色のドレスを着ていました。

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 noun /ˈɪnˌteɪk/

intake

摂取

Meaning

the process of taking something in, especially food or drink

Example

He monitored his daily intake of calories to maintain a healthy diet.

彼は健康的な食事を維持するために毎日のカロリー摂取量を監視しました。

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。

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 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 /ˈɪmɪnənt/

imminent

差し迫った

Meaning

About to happen; likely to occur very soon.

Example

Dark clouds signaled that a storm was imminent.

暗い雲は嵐が迫っていることを示していた。

C1 adverb /ˌɪnsɪˈdɛntəli/

incidentally

ちなみに

Meaning

by the way; used to introduce a remark not directly related to the main subject

Example

Incidentally, did you know that she studied in Paris?

ちなみに、彼女がパリで勉強していたことを知っていましたか？

B2 noun ˌɪmplɪmenˈteɪʃən

implementation

実行

Meaning

The process of putting a decision or plan into effect; execution.

Example

Proper implementation of policies is crucial.

方針の適切な実行は重要です。

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。

C1 noun /ˈɪn.tə.lekt/

intellect

知能

Meaning

The ability to think, reason, and understand objectively.

Example

Her intellect is admired by all her colleagues.

彼女の知能はすべての同僚に賞賛されています。

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。

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。

A1 preposition /ɪn ˈfrʌnt əv/

in front of

〜の前に

Meaning

positioned before or ahead of something; facing or located at the forward side of a person or object

Example

She stood in front of the building.

彼女は建物の前に立っていた。

C1 noun /ˌɪn.səˌbɔːr.dɪˈneɪ.ʃən/

insubordination

反抗

Meaning

Defiance of authority; refusal to obey orders.

Example

The soldier was punished for insubordination during the mission.

その兵士はミッション中の反抗で罰せられました。

C1 noun /ˌɪnækˈtɪvɪti/

inactivity

不活動

Meaning

the state of not being active physically or mentally; lack of action

Example

Prolonged inactivity can negatively affect both physical and mental health.

長期間の不活動は身体的および精神的健康に悪影響を与えます。

A1 adjective /ɪmˈpɔː.tənt/

important

重要

Meaning

Of great significance or value; likely to have a profound effect on success, survival, or well-being.

Example

Important steps must be taken to address pollution.

汚染に対処するためには重要なステップを踏む必要があります。

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 /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。

C1 noun ɪnˈsɛpʃən

inception

始まり

Meaning

The establishment or starting point of an institution or activity.

Example

The inception of the company marked a new era in the industry.

その企業のインセプションは業界に新しい時代を築きました。

B1 adjective /ɪnˈvɑːlvd/

involved

関与した

Meaning

complicated or engaged in something

Example

She was deeply involved in community service.

彼女は地域社会の奉仕活動に深く関与していた。

C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

取り返しのつかない損害

Meaning

Harm or injury that cannot be undone or repaired.

Example

Climate change causes irreversible damage to ecosystems.

気候変動は生態系に取り返しのつかない損害を与えます。

C1 noun /ɪnˈfjuːʒən/

infusion

注入

Meaning

the act of introducing something into another; a drink made by steeping leaves or herbs in liquid

Example

She prepared a calming infusion of chamomile tea.

彼女はカモミールティーの落ち着く注入を準備しました。

A2 noun, verb /ˈɪʃuː/

issue

問題, 発行, 配布

Meaning

A problem, topic, or the act of supplying or distributing something.

Example

The magazine will issue a new edition next week.

雑誌は来週新しい版を発行します。

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。

C1 noun /ɪˈnɜː.ʃə/

Inertia

慣性; 活動の欠如

Meaning

a tendency to do nothing or remain unchanged; lack of activity or movement

Example

The team's inertia prevented them from adapting to the rapidly changing market conditions.

チームの慣性は、急速に変化する市場の状況に適応するのを妨げました。

B2 verb /ˈɪnəveɪt/

innovate

革新

Meaning

To introduce new methods, ideas, or products.

Example

The company must innovate to stay ahead of its competitors.

その企業は競争相手を追い越すために革新を続けなければならない。

B1 noun aɪˈdɛntɪti

identity

アイデンティティ

Meaning

The fact of being who or what a person or thing is; the characteristics determining who or what a person or thing is.

Example

The day reinforces our national identity.

その日は私たちの国民的アイデンティティを強化します。

C2 noun /ɪnˈfrækʃən/

infraction

違反

Meaning

A violation or breach of a rule, law, or agreement.

Example

The student was punished for a minor infraction of the school rules.

学生は学校の規則の軽微な違反で罰せられました。

C2 noun /ˌɪn.trəˈɡreʃ.ən/

introgression

遺伝子流入

Meaning

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

Example

Introgression plays a significant role in plant breeding.

イントログレッションは植物育種において重要な役割を果たします。

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。

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。

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。

C2 verb /ɪnˈhjuːm/

inhume

埋葬する

Meaning

to bury a dead body in the ground

Example

They inhumed the warrior with full honors.

彼らは戦士を完全な名誉を持って埋葬しました。

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。

B1 adjective /aɪˈdiːəl/

ideal

理想的な

Meaning

the best possible; perfect for a situation

Example

This place is ideal for a picnic.

この場所はピクニックに理想的です。

C2 adjective /ɪmˈprɛɡnəbl̩/

impregnable

攻略不可能

Meaning

Unable to be captured, broken into, or defeated.

Example

The fortress was considered impregnable by the enemy.

その要塞は敵によって攻略不可能と見なされていました。

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。

B2 verb /ɪnˈdjuːs/

induce

誘発する

Meaning

to cause or persuade someone to do something; to bring about a result

Example

The doctor induced sleep with a mild sedative.

医師は軽い鎮静剤で睡眠を引き起こしました。

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。

C1 adjective /ˌɪnɑːrˈtɪkjʊlət/

inarticulate

言葉が不明瞭

Meaning

Unable to express oneself clearly or effectively in speech or writing.

Example

She became inarticulate with emotion during the speech.

彼女はスピーチ中に感情で言葉が不明瞭になった。

C1 adjective /ɪmˈpɑːrʃəl/

Impartial

公正; 中立的

Meaning

treating all sides fairly; unbiased; neutral

Example

A good judge must remain impartial throughout the trial.

優れた裁判官は裁判中に公正を保たなければなりません。

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 noun /ˈɪd.i.ə.si/

Idiocy

愚かさ

Meaning

extremely stupid behavior or actions; foolishness

Example

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

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

C2 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.

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。

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。

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 noun /ˈaɪ.dəl/

Idol

偶像; 崇拝される人物

Meaning

an image or representation of a god used as an object of worship; a person who is greatly admired

Example

The singer became a teenage idol after her hit song topped the charts worldwide.

その歌手はヒットソングが世界中のチャートで1位に達した後、ティーンエイジャーのアイドルとなった。

C1 noun /ɪmˈpɒs.tər/

Impostor

詐欺師; 偽者

Meaning

a person who pretends to be someone else in order to deceive others; a fraud

Example

The impostor convinced everyone he was a doctor until his fake credentials were discovered.

詐欺師は医者だとみんなを納得させましたが、彼の偽の資格が発覚するまでそれが続きました。

B1 noun /ɪnˈɡriːdiənt/

ingredient

材料

Meaning

A component part or element of something, especially in a recipe.

Example

Flour is a key ingredient in baking bread.

小麦粉はパン作りにおける重要な材料です。

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。

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 /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 noun /ˈɪndələns/

indolence

怠惰

Meaning

Avoidance of activity or exertion; laziness.

Example

His indolence kept him from finishing the project on time.

彼の怠惰は彼が時間通りにプロジェクトを完成させるのを妨げました。

B1 verb /ɪnˈvɑːlv/

involve

関与する

Meaning

to include as a necessary part, or to engage someone in an activity

Example

The project will involve several departments working together.

このプロジェクトは、いくつかの部署が一緒に働くことを含むでしょう。

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 verb /ɪnˈveɪd/

invade

侵入する

Meaning

to enter a place or country forcefully, especially as an enemy

Example

The army invaded the neighboring country.

軍隊は隣国に侵入しました。

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 noun /ˌɪntərˈlɒkjətər/

interlocutor

対話者

Meaning

a person who takes part in a conversation or dialogue

Example

She was a skilled interlocutor during the debate.

彼女は討論中に優れた対話者でした。

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。

C1 adverb ɪnˈtrɪn.zɪ.kli

intrinsically

本質的に

Meaning

In a way that is naturally or inherently part of something's essential nature.

Example

Some people are intrinsically motivated to learn.

いくつかの人々は本質的に学ぶことに動機づけられている。

C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

無機の

Meaning

relating to substances that are not derived from living organisms; lacking organic structure or growth

Example

Inorganic compounds are commonly studied in chemistry labs.

無機化合物は化学の基本です。

C1 adjective /ɪnˈsteɪbəl/

instable

不安定な

Meaning

not stable; liable to change, collapse, or fail; lacking firmness or reliability

Example

The instable political situation worried foreign investors.

不安定な政治状況が外国の投資家を心配させた。

C2 noun /ɪnˈɡrætɪˌtjuːd/

ingratitude

恩知らず

Meaning

Lack of gratitude; failure to show thanks or appreciation.

Example

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

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

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。

A1 pronoun /ɪts/

its

それの

Meaning

Belonging to or associated with a thing previously mentioned.

Example

The company changed its logo last year.

会社は昨年そのロゴを変更しました。

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。

B2 noun /ɪnˈkluːʒən/

inclusion

インクルージョン

Meaning

the action or state of including or being included within a group or structure

Example

Diversity and inclusion are key values in modern workplaces.

多様性とインクルージョンは現代の職場における重要な価値観です。

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 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。