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B1 adjective /ˈɪnər/

inner

内在的
Meaning
Located inside or closer to the center; relating to one’s thoughts or feelings.
Example
She shared her inner thoughts with her best friend.
她与她最好的朋友分享了她的内心想法。
A2 verb /ɪmˈpruːv/

improve

改善
Meaning
to make or become better; to enhance quality or condition
Example
Practice helps improve your skills.
练习帮助提高你的技能。
C2 adjective /ɪˈnɪm.ɪ.tə.bəl/

inimitable

无可比拟
Meaning
So good or unusual as to be impossible to copy; unique.
Example
His inimitable writing style made him a literary legend.
他那无可比拟的写作风格使他成为了文学传奇。
B2 verb /ˌɪntərˈviːn/

intervene

介入
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.
老师不得不介入，阻止学生之间的打架。
C1 adjective; noun /ɪˈmɔːrtl/

immortal

不朽的
Meaning
living forever; never dying; lasting forever in fame or memory
Example
Legends often describe heroes as immortal beings who never die.
传说中英雄是不朽的存在。
C2 adjective /ɪˈrædɪkəbəl/

irradicable

不可根除的
Meaning
not able to be eradicated; impossible to destroy or remove completely
Example
The love of a mother for her child is irradicable.
母亲对孩子的爱是不可根除的。
B2 noun ˌɪm.plɪˈkeɪ.ʃən

implication

暗示
Meaning
A conclusion that can be drawn from something although it is not explicitly stated; a likely consequence.
Example
The implication of climate change is severe.
气候变化的暗示意义是严重的。
C2 noun /ˈaɪdlər/

idler

懒汉
Meaning
A person who avoids work or spends time lazily.
Example
He was known as an idler who wasted his days.
他被称为一个懒汉，浪费了他的日子。
C2 noun /ˈaɪ.kɒn/

ikon

宗教图像或符号
Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
教堂展示了美丽的圣母玛利亚圣像。
C2 noun /ˌɪntərˈrɛɡnəm/

interregnum

过渡期
Meaning
A period between rulers or governments when normal leadership is suspended.
Example
The country faced instability during the interregnum after the king’s death.
在国王去世后的过渡期，该国经历了不稳定。
C2 noun /ɪnˈvɛstɪtʃər/

investiture

授职仪式
Meaning
the formal ceremony of conferring authority, rank, or office
Example
The king held an investiture ceremony for the new knight.
国王为新骑士举行了授职仪式。
C1 adjective /ɪnˈsʌf.ər.ə.bəl/

insufferable

无法忍受
Meaning
Too extreme to bear; intolerable.
Example
The heat during the summer was insufferable.
夏天的炎热是无法忍受的。
B2 noun /ɪnˈspekʃən/

inspection

检查
Meaning
a careful examination of something, especially to check that it is correct or safe
Example
The building passed the safety inspection last week.
该建筑上周通过了安全检查。
B2 noun /ˈɪɡ.nər.əns/

Ignorance

无知
Meaning
lack of knowledge or information; the state of being uninformed about something
Example
His ignorance about basic computer skills made it difficult for him to find a job.
他对基本计算机技能的无知使他很难找到工作。
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

不可能性
Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
两次赢得彩票的可能性几乎为零，但她仍然买了票。
C1 noun /ɪmˈpɛd.ɪ.mənt/

impediment

障碍
Meaning
A hindrance or obstruction in doing something; something that prevents progress.
Example
Lack of funds is a major impediment to the project.
资金不足是项目的主要障碍。
C2 adjective /ɪmˈpælpəbəl/

impalpable

难以触及的
Meaning
unable to be felt by touch; difficult to grasp or understand
Example
There was an impalpable sense of fear in the room.
房间里有一种难以触及的恐惧感。
C2 adjective /ɪnˈkoʊ.ɪt/ or /ɪnˈkoʊ.eɪt/

inchoate

未完成的
Meaning
Just begun and not fully formed; rudimentary.
Example
His inchoate ideas needed more research to be developed.
他的未完成的想法需要更多的研究才能发展。
C2 adjective /ˌɪnkəmˈprɛsəbl/

incompressible

不可压缩
Meaning
Not able to be pressed or squeezed into a smaller space.
Example
Liquids are generally considered incompressible.
液体通常被认为是不可压缩的。
A2 adverb /ɪnˈdiːd/

indeed

确实
Meaning
used to emphasize or confirm a statement
Example
It was a long journey indeed.
这是一次漫长的旅行，确实。
C1 verb /ɪmˈpɜːrsəneɪt/

impersonate

假扮
Meaning
to pretend to be another person in order to entertain or deceive
Example
He was arrested for trying to impersonate a police officer.
他因尝试冒充一名警察而被逮捕。
C1 noun /ɪnˈdjuːsmənt/

inducement

诱因
Meaning
something that persuades or encourages someone to do something
Example
The company offered a bonus as an inducement to employees.
公司提供了奖金作为员工的诱因。
C1 noun /ˈɪn.tə.mə.si/

Intimacy

亲密; 亲近
Meaning
close familiarity or friendship; closeness; a private cozy atmosphere
Example
The couple valued the emotional intimacy they shared more than material possessions.
这对情侣比物质财富更珍视他们分享的情感亲密。
B2 adjective /ɪnˈækjərət/

Inaccurate

不正确; 错误的; 错误的
Meaning
not correct; containing errors; wrong
Example
The weather forecast was inaccurate yesterday.
昨天的天气预报不准确。
B2 adjective /ɪˈmædʒɪnəbl/

imaginable

可想象的
Meaning
Capable of being imagined or conceived.
Example
They offered every imaginable type of food at the festival.
他们在节日上提供了所有可以想象的食物类型。
C1 adjective /ɪmˈpɜːrtɪnənt/

impertinent

无礼的
Meaning
rude and showing a lack of respect
Example
It was impertinent of him to question the manager's decision.
他质疑经理的决定是无礼的。
B2 noun /ɪnˈtɛnsəti/

intensity

强度
Meaning
The quality of being extreme, strong, or forceful in degree.
Example
The intensity of the storm frightened the villagers.
风暴的强度吓坏了村民。
C2 adjective /ˌɪɡ.nəˈmɪn.i.əs/

ignominious

可耻的
Meaning
Marked by shame, disgrace, or humiliation.
Example
The team suffered an ignominious defeat in the finals.
队伍在决赛中遭遇了可耻的失败。
C1 noun /ˌɪntərˈmiːdiˌɛri/

intermediary

中介
Meaning
A person who acts as a link between people in order to try to bring about an agreement; a mediator.
Example
The diplomat served as an intermediary between the two conflicting nations.
外交官作为两国冲突中的中介起到了作用。
C2 adjective /aɪˈtɪnərənt/

itinerant

流动的
Meaning
Traveling from place to place, especially for work or duty.
Example
The itinerant teacher moved from village to village to educate children.
这位流动的教师从一个村庄到另一个村庄，教育孩子们。
C1 noun (plural) /ˈɪndɪˌsiːz/

indices

指数
Meaning
plural form of index; statistical measures or reference points used for comparison
Example
Stock market indices fell sharply after the announcement.
公告后，股市指数急剧下跌。
C1 adjective /ˌɪnkəʊˈhɪərənt/

incoherent

不连贯
Meaning
Not clear or easy to understand; lacking logical connection.
Example
His explanation was so incoherent that nobody could follow it.
他的解释如此不连贯，以至于没有人能理解。
C1 adjective /ˌɪnɑːrˈtɪkjʊlət/

inarticulate

含糊不清
Meaning
Unable to express oneself clearly or effectively in speech or writing.
Example
She became inarticulate with emotion during the speech.
她在演讲中因为情绪而变得含糊不清。
C2 noun /ˌɪn.ʌnˈdeɪ.ʃən/

inundation

洪水
Meaning
The act of flooding or overwhelming with water or things.
Example
The town suffered from a severe inundation after the heavy rains.
该市在暴雨后遭受了严重的洪水。
C1 verb ɪˈnɔː.ɡjə.reɪ.tɪd

inaugurated

开幕
Meaning
Begin or introduce (a system, policy, or period) formally.
Example
The organization was inaugurated officially.
该组织已正式开幕。
C1 adjective /ɪnˈdiːsənt/

indecent

不雅的
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.
他因为说了不雅的话而受到警告。
C2 verb /ɜːrk/

irk

激怒
Meaning
to annoy or irritate someone
Example
It irks me when people are late without calling.
当人们没有打电话就迟到时，我感到很生气。
B1 noun /ɪnˌvɛs.tɪˈɡeɪ.ʃən/

investigation

调查
Meaning
the process of inquiring into or examining something carefully to find the truth
Example
The investigation revealed new evidence about the fraud.
调查揭示了有关欺诈的新证据。
C1 adverb /ˌɪnsɪˈdɛntəli/

incidentally

顺便
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?
顺便问一下，你知道她曾经在巴黎学习吗？
C1 adjective /ɪnˈsɪstənt/

insistent

坚持的
Meaning
demanding something firmly and refusing to accept no
Example
The child was insistent on getting a new toy.
孩子坚持要得到一个新玩具。
C1 adjective /ˌɪndɪˈskrɪmɪnət/

indiscriminate

不加区分的
Meaning
Done without careful judgment; random or haphazard.
Example
The indiscriminate use of pesticides harms the environment.
滥用杀虫剂对环境造成了伤害。
B2 noun /ɪnˈfɪnɪti/

infinity

无限
Meaning
A concept describing something without any limit or end.
Example
The universe seems to stretch into infinity.
宇宙似乎无限延伸。
B2 noun ˌɪn.təˈven.ʃən

intervention

干预
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.
联合国的干预对解决冲突至关重要。
B2 verb /ɪmˈprɪzən/

imprison

囚禁
Meaning
to put someone in prison; to confine or restrict someone's freedom
Example
The judge imprisoned the criminal for five years.
法官把罪犯囚禁了五年。
C1 adjective /ɪnˈfɜːm/

infirm

虚弱
Meaning
Weak, especially due to old age or illness.
Example
The infirm old man needed assistance to walk.
那位虚弱的老人需要帮助才能走路。
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.
会议因为一次意外的中断而被推迟。
C1 adjective /ɪmˈpɛn.ɪ.trə.bəl/

impenetrable

Meaning
Impossible to pass through or enter; impossible to understand.
Example
The dense forest was nearly impenetrable.
B2 verb /ɪnˈfɛkt/

infect

传染
Meaning
To contaminate with a disease-causing organism.
Example
The virus can infect healthy people quickly.
病毒可以迅速传染健康的人。
C1 noun /ˈɪntərˌpleɪ/

interplay

相互作用
Meaning
The way in which two or more things have an effect on each other.
Example
The interplay between culture and technology shapes modern life.
文化与技术之间的相互作用塑造了现代生活。
C1 verb /ɪnˈkɜːr/

incur

遭受
Meaning
To bring upon oneself something undesirable, usually as a result of actions.
Example
He incurred a fine for parking in the wrong place.
他因在错误的地方停车而被罚款。
B2 adjective /ɪnˈfɔːrmətɪv/

Informative

有教育意义的
Meaning
giving or providing useful information; educational; instructive
Example
The documentary was very informative and educational.
这部纪录片信息量很大，具有教育意义。
C1 adjective /ɪnˈflæməˌtɔːri/

inflammatory

幸福
Meaning
causing inflammation in the body; arousing anger, hostility, or strong emotion
Example
His inflammatory speech triggered protests across the city.
她在收到奖项时无法隐藏自己的幸福感。
C1 noun /ɪnˈsaɪtmənt/

incitement

煽动
Meaning
the action of provoking unlawful or violent behavior
Example
He was arrested for incitement to riot.
他因煽动暴乱被逮捕。
C2 adjective /ˌɪrɪˈdjuːsəbl/

irreducible

不可约的
Meaning
impossible to reduce or simplify further
Example
The fraction 3/7 is irreducible.
分数 3/7 是不可约的。
B2 verb /ɪnˈherɪt/

inherit

继承
Meaning
to receive money, property, or characteristics from someone when they die; to acquire from predecessors
Example
She inherited her grandmother's house.
她继承了她祖母的房子。
B2 verb /ˈɪl.ə.streɪt/

illustrate

插图
Meaning
to explain or make something clear by using examples, pictures, or comparisons
Example
The teacher used diagrams to illustrate the concept.
老师用图表来说明这个概念。
C2 adjective /ɪnˈsɪpiənt/

incipient

初期的
Meaning
in an initial stage; beginning to develop
Example
The incipient storm made the sky turn dark and heavy.
初期的风暴使天空变得阴暗而沉重。
C1 noun /ɪnˈhɛrɪtər/

inheritor

继承人
Meaning
a person who receives money, property, or a title when someone dies
Example
She became the inheritor of her family's estate.
她成为了家族财产的继承人。
A1 noun /aɪs/

Ice

冰
Meaning
water that has frozen and become solid
Example
The ice in my drink melted quickly in the hot weather.
我饮料中的冰在热天气下很快融化了。
C1 noun /ˈɪrɪtənt/

irritant

刺激物
Meaning
something that causes irritation or discomfort
Example
Dust is a common irritant for people with allergies.
灰尘是过敏者常见的刺激物。
C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

不可争辩的; 不容否认的; 确定的
Meaning
impossible to deny or argue against; undeniable; certain
Example
The evidence against him was indisputable.
反对他的证据是不可争辩的。
B2 noun /ɪnˈhæbɪtənt/

inhabitant

居民
Meaning
a person or animal that lives in a particular place
Example
The inhabitants of the village rely on farming for their livelihood.
村庄的居民依靠农业为生。
C2 adjective /ɪnˈɡreɪʃiˌeɪtɪŋ/

ingratiating

奉承的
Meaning
Charming or flattering in a way intended to gain favor.
Example
His ingratiating smile made everyone trust him quickly.
他的奉承笑容让每个人都迅速信任了他。
B2 noun ɪnˈdʒʌstɪs

injustice

不公正
Meaning
Lack of fairness or justice; the practice of being unjust or unfair.
Example
The story portrays the injustices faced by the common people.
故事描绘了普通人面临的不公正。
C2 adverb /ˈaɪsɪli/

icily

冷漠地
Meaning
In a very cold, unfriendly, or hostile manner.
Example
She replied icily to his question.
她冷漠地回答了他的问题。
A1 preposition/adverb/adjective/noun /ˌɪnˈsaɪd/

inside

幸福
Meaning
Situated within something; the inner part of something.
Example
She waited inside the house until the rain stopped.
当她收到奖项时，她无法掩饰自己的幸福。
C1 noun /ɪnˈdɪf.ər.əns/

Indifference

冷漠; 漠视; 冷淡
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.
他对学业的冷漠导致了整个学期的成绩很差。
C1 verb ɪˈnɪʃɪeɪtɪd

initiated

启动
Meaning
Caused a process or action to begin; started something.
Example
The project was initiated to enhance marine biodiversity.
该项目已启动以促进海洋生物多样性。
C1 adjective /ɪmˈpæsəbəl/

impassable

无法通行
Meaning
Impossible to travel along or over.
Example
The road became impassable after the heavy snowfall.
这条路在大雪过后变得无法通行。
C1 noun /ɪnˈɛk.wɪ.ti/

inequity

不公平
Meaning
Lack of fairness or justice; unequal distribution or treatment.
Example
Social inequity continues to be a global issue.
社会不公平仍然是一个全球性问题。
C1 noun /ɪmˈpɛdɪmənt/

impediments

障碍
Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
经济障碍常常阻碍社会发展。
C1 adjective /ɪnˈfæləbl̩/

infallible

无懈可击
Meaning
incapable of making mistakes or being wrong
Example
Her judgment seemed infallible in matters of finance.
她的判断在财务问题上似乎无懈可击。
C1 verb /ˈɪrɪˌɡeɪt/

irrigate

灌溉
Meaning
to supply water to land or crops; to wash out a wound with water
Example
Farmers irrigate their fields during dry seasons.
农民在干旱季节灌溉他们的田地。
C2 noun /ɪˈnɪkwɪti/

iniquity

不公
Meaning
Immoral or grossly unfair behavior.
Example
The dictator's regime was marked by corruption and iniquity.
独裁者的政权因腐败和不公而闻名。
C2 adjective /ˈɪnfəntaɪl/

infantile

婴儿式
Meaning
characteristic of an infant; childish
Example
His infantile behavior embarrassed everyone at the meeting.
他那种婴儿式的行为让会议上的每个人都感到尴尬。
C2 adjective /ɪnˈfɜːrnəl/

infernal

地狱的
Meaning
relating to hell; extremely troublesome or annoying
Example
The workers complained about the infernal noise from the construction site.
工人们抱怨施工现场的地狱般噪音。
B1 verb ɪnˈkriːsɪŋ

increasing

增加
Meaning
Becoming or making greater in size, amount, intensity, or degree; growing.
Example
Increasing awareness about education is necessary.
提高对教育的意识是必要的。
B2 adjective /ɪnˈstrʌkʃənəl/

instructional

教学的
Meaning
providing knowledge or information; intended to teach
Example
The website offers many instructional videos for beginners.
该网站提供许多教学视频，适合初学者。
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.
这位僧侣被认为是慈悲的化身。
C1 adjective, noun /ɪnˈdɪkətɪv/

indicative

指示性
Meaning
Serving as a sign or expression of something; in grammar, a mood used to make factual statements.
Example
His tone was indicative of his frustration.
他的语气表明了他的沮丧。
B2 adjective /ɪˈmætʃʊr/

Immature

不成熟; 未完全发展; 幼稚
Meaning
not fully developed; lacking emotional or intellectual development; childish
Example
His immature behavior during the meeting disappointed everyone.
他在会议中的不成熟行为让大家都很失望。
B2 verb /ɪnˈdjuːs/

induce

引起
Meaning
to cause or persuade someone to do something; to bring about a result
Example
The doctor induced sleep with a mild sedative.
医生用轻度镇静剂引起了睡眠。
C1 adjective /ɪnˈveɪsɪv/

invasive

侵入性的
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
医生解释说，该程序是最小的侵入性。
C2 adjective /ˌɪrɪˈlɪdʒəs/

irreligious

不信教的
Meaning
Indifferent or hostile to religion
Example
Some people in the community consider him irreligious because he never attends religious services.
社区中的一些人认为他不信教，因为他从不参加宗教服务。
C1 adjective /ɪˈræʃənəl/

irrational

非理性
Meaning
not logical or reasonable; lacking clear thought
Example
His fear of the dark was completely irrational.
他对黑暗的恐惧完全是非理性的。
C1 adjective /ˈɪnbɔːrn/

Inborn

与生俱来的; 天生的; 内在的
Meaning
existing from birth; natural; inherent
Example
She has an inborn talent for music.
她有天生的音乐才能。
C1 noun /ɪnˈfɜːməri/

infirmary

医务室
Meaning
A hospital or place where the sick or injured are cared for.
Example
The school had an infirmary for minor injuries.
学校为轻微受伤提供了医务室。
B2 verb /ɪmˈpoʊz/

impose

强加
Meaning
to force someone to accept something; to establish or apply by authority
Example
The government imposed new taxes on luxury goods.
政府对奢侈品征收了新税。
C1 adjective /ɪˈrɛfjʊtəbəl/

Irrefutable

不可反驳的
Meaning
impossible to deny or disprove; undeniable
Example
The evidence against him was irrefutable.
对他的证据是不可反驳的。
C1 adjective /ˌɪndɪˈskriːt/

indiscreet

不谨慎
Meaning
Not careful in what one says or does, likely to reveal secrets or offend.
Example
It was indiscreet of him to mention the plan in public.
他在公众场合提到计划是不谨慎的。
B1 adjective /ɪmˈpeɪʃənt/

impatient

不耐烦
Meaning
Not able to wait calmly; restless and eager for something to happen.
Example
She grew impatient while waiting in the long queue.
她在长队中等得不耐烦。
C2 adjective /ɪnˈkɒnstənt/

inconstant

不稳定的
Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
他的情绪不稳定使得与他合作变得困难。
C2 noun /ˈɪmpjʊdəns/

impudence

无礼
Meaning
Rude and disrespectful behavior.
Example
The student's impudence shocked the entire class.
学生的无礼行为让全班震惊。
C1 noun ɪnˈsɛpʃən

inception

开端
Meaning
The establishment or starting point of an institution or activity.
Example
The inception of the company marked a new era in the industry.
公司的创始标志着行业的新纪元。
C2 noun /ɪnˈtɜːrstɪs/

interstice

缝隙
Meaning
a small space that lies between things
Example
Light filtered through the narrow interstices of the wall.
光线透过墙壁的狭窄缝隙照射进来。
C2 noun /ɪnˈvɛktɪv/

invective

侮辱性语言
Meaning
Insulting, abusive, or highly critical language.
Example
The politician’s speech was filled with invective against his opponents.
政治家的演讲充满了对对手的侮辱性语言。
C2 adjective /ˌɪnkəmˈbʌstəbl/

incombustible

不燃烧
Meaning
Not capable of catching fire or burning.
Example
This material is incombustible and safe for construction.
这种材料是防火的，适合建筑使用。
C1 noun /ɪnˈædɪkwəsi/

inadequacy

不足
Meaning
lack of sufficient ability, quality, or strength; a feeling of not being good enough
Example
She struggled with feelings of inadequacy at work despite her strong qualifications.
尽管资历很强，她在工作中仍感到不足。
C1 noun /ɪnˈdʌstriəsnəs/

industriousness

勤奋
Meaning
The quality of being hardworking and diligent.
Example
His industriousness earned him a promotion at work.
他的勤奋为他在工作中赢得了晋升。
C2 verb /ˈɪməleɪt/

immolate

自焚
Meaning
To kill or sacrifice, especially by burning.
Example
The protesters threatened to immolate themselves in front of the building.
抗议者威胁要在建筑物前自焚。
C2 noun /ˈænʒənuː/

ingenue

天真无邪的年轻女性
Meaning
an innocent, naïve young woman, especially as represented in literature or theater
Example
She played the role of the ingénue in the play with great charm.
她在剧中扮演了那个天真无邪的年轻女性，展现了极大的魅力。
B2 noun /ˈɪnvənˌtɔːri/

inventory

清单
Meaning
A complete list of items, such as goods in stock or property.
Example
The shopkeeper checked the inventory before opening the store.
店主在开店前检查了清单。
C2 adjective /ɪnˈɛksərəbl/

inexorable

不可阻挡
Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
技术的不可阻挡的崛起正在改变生活的方方面面。
C1 noun ˌɪndɪˈspensəbl səˈpɔːrt

indispensable support

不可或缺的支持
Meaning
Essential assistance that cannot be done without; absolutely necessary help.
Example
Volunteers provide indispensable support to communities.
志愿者为社区提供不可或缺的支持。
C1 adjective /ɪmˈpɜːrviəs/

impervious

不透水的
Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
这件夹克不透水。
C2 noun /ˌɪmpəˈtjuːəsəti/

impetuosity

冲动性
Meaning
The quality of being rash or impulsive.
Example
His impetuosity often got him into trouble.
他的冲动性常常让他陷入麻烦。
B2 noun /ˈɪn.flu.ən.sər/

Influencer

网红, 社交媒体影响者
Meaning
A person with the ability to influence potential buyers of a product or service by promoting or recommending the items on social media.
Example
Social media influencers shape consumer preferences.
社交媒体上的网红塑造了消费者的偏好。
B2 noun /ˌɪnəˈbɪləti/

inability

无能
Meaning
the state of being unable to do something
Example
His inability to make decisions affected his career.
他无法做决定，这影响了他的职业生涯。
B2 adjective aɪˈkɒnɪk

iconic

标志性的
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.
那句 "这是最美好的时光..." 是标志性的。
C1 adjective /ɪnˈtɒl.ər.ə.bəl/

Intolerable

难以忍受的
Meaning
unable to be endured; extremely unpleasant or painful
Example
The noise from the construction site was intolerable.
建筑工地的噪音让人无法忍受。
C1 noun /ˌɪmɔːrˈtæləti/

immortality

不朽
Meaning
the state of living forever; eternal life or lasting fame beyond death
Example
Many ancient cultures believed that heroes could achieve immortality through great deeds.
许多古代文化相信英雄可以通过伟大的事迹获得不朽。
B2 adjective /ˌɪnsɪˈkjʊə/

insecure

不安全的
Meaning
not confident or assured; uncertain and anxious
Example
She felt insecure about her performance in the exam.
她在考试中对自己的表现感到不安。
B2 noun /ˈɪm.pʌls/

Impulse

冲动; 突然的欲望
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.
她冲动购买了那件昂贵的衣服，后来对这笔购买感到后悔。
B2 noun /ɪnˈveɪʒən/

invasion

入侵
Meaning
An instance of invading a country, region, or personal space with armed force or unwelcome presence.
Example
The army prepared for the possibility of an invasion.
军队为可能的入侵做了准备。
C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

无机的
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.
无机化合物是化学的重要部分。
C2 noun /ɪnˈtræn.sɪ.dʒəns/

intransigence

固执
Meaning
Refusal to change one's views or to agree about something.
Example
The negotiations failed due to the intransigence of both parties.
由于双方的固执，谈判失败了。
C2 adjective /ˌɪrɪˈdɛsənt/

iridescent

彩虹色
Meaning
showing luminous colors that seem to change when seen from different angles
Example
She wore an iridescent dress that sparkled in the light.
她穿了一件在光线下闪闪发光的彩虹色裙子。
C2 noun /ˈɪn.tɪ.ɡreɪ.tɪv dɪˈpləʊ.mə.si/

integrative diplomacy

综合外交
Meaning
A diplomatic approach that seeks to combine or coordinate different elements, interests, or parties into a unified whole.
Example
Integrative diplomacy strengthens alliances.
综合外交增强了联盟。
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.
慢性炎症可能导致严重的疾病。
C1 adjective /ɪnˈdefɪnət/

Indefinite

不确定的
Meaning
not clearly defined; uncertain; vague; unlimited in time
Example
The meeting has been postponed for an indefinite period.
会议被推迟到一个不确定的时期。
C1 verb /ɪnˈhɪbɪt/

inhibit

抑制
Meaning
to prevent or restrain someone or something from acting freely; to hinder
Example
Fear can inhibit personal growth.
恐惧可能会抑制个人成长。